diff --git a/modules/mono/SCsub b/modules/mono/SCsub
new file mode 100644
index 00000000000..0af2056c5cb
--- /dev/null
+++ b/modules/mono/SCsub
@@ -0,0 +1,120 @@
+#!/usr/bin/env python
+
+Import('env')
+
+
+def make_cs_files_header(src, dst):
+    with open(dst, 'wb') as header:
+        header.write('/* This is an automatically generated file; DO NOT EDIT! OK THX */\n')
+        header.write('#ifndef _CS_FILES_DATA_H\n')
+        header.write('#define _CS_FILES_DATA_H\n\n')
+        header.write('#include "map.h"\n')
+        header.write('#include "ustring.h"\n')
+        inserted_files = ''
+        import os
+        for file in os.listdir(src):
+            if file.endswith('.cs'):
+                with open(os.path.join(src, file), 'rb') as f:
+                    buf = f.read()
+                    decomp_size = len(buf)
+                    import zlib
+                    buf = zlib.compress(buf)
+                    name = os.path.splitext(file)[0]
+                    header.write('\nstatic const int _cs_' + name + '_compressed_size = ' + str(len(buf)) + ';\n')
+                    header.write('static const int _cs_' + name + '_uncompressed_size = ' + str(decomp_size) + ';\n')
+                    header.write('static const unsigned char _cs_' + name + '_compressed[] = { ')
+                    for i, buf_idx in enumerate(range(len(buf))):
+                        if i > 0:
+                            header.write(', ')
+                        header.write(str(ord(buf[buf_idx])))
+                    inserted_files += '\tr_files.insert(\"' + file + '\", ' \
+                                        'CompressedFile(_cs_' + name + '_compressed_size, ' \
+                                        '_cs_' + name + '_uncompressed_size, ' \
+                                        '_cs_' + name + '_compressed));\n'
+                    header.write(' };\n')
+        header.write('\nstruct CompressedFile\n' '{\n'
+            '\tint compressed_size;\n' '\tint uncompressed_size;\n' '\tconst unsigned char* data;\n'
+            '\n\tCompressedFile(int p_comp_size, int p_uncomp_size, const unsigned char* p_data)\n'
+            '\t{\n' '\t\tcompressed_size = p_comp_size;\n' '\t\tuncompressed_size = p_uncomp_size;\n'
+            '\t\tdata = p_data;\n' '\t}\n' '\n\tCompressedFile() {}\n' '};\n'
+            '\nvoid get_compressed_files(Map<String, CompressedFile>& r_files)\n' '{\n' + inserted_files + '}\n'
+            )
+        header.write('#endif // _CS_FILES_DATA_H')
+
+
+env.add_source_files(env.modules_sources, '*.cpp')
+env.add_source_files(env.modules_sources, 'mono_gd/*.cpp')
+env.add_source_files(env.modules_sources, 'utils/*.cpp')
+
+if env['tools']:
+    env.add_source_files(env.modules_sources, 'editor/*.cpp')
+    make_cs_files_header('glue/cs_files', 'glue/cs_compressed.gen.h')
+
+vars = Variables()
+vars.Add(BoolVariable('mono_glue', 'Build with the mono glue sources', True))
+vars.Update(env)
+
+# Glue sources
+if env['mono_glue']:
+    env.add_source_files(env.modules_sources, 'glue/*.cpp')
+else:
+    env.Append(CPPDEFINES = [ 'MONO_GLUE_DISABLED' ])
+
+if ARGUMENTS.get('yolo_copy', False):
+    env.Append(CPPDEFINES = [ 'YOLO_COPY' ])
+
+# Build GodotSharpTools solution
+
+import os
+import subprocess
+import mono_reg_utils as monoreg
+
+
+def mono_build_solution(source, target, env):
+    if os.name == 'nt':
+        msbuild_tools_path = monoreg.find_msbuild_tools_path_reg()
+        if not msbuild_tools_path:
+            raise RuntimeError('Cannot find MSBuild Tools Path in the registry')
+        msbuild_path = os.path.join(msbuild_tools_path, 'MSBuild.exe')
+    else:
+        msbuild_path = 'msbuild'
+
+    output_path = os.path.abspath(os.path.join(str(target[0]), os.pardir))
+
+    msbuild_args = [
+        msbuild_path,
+        os.path.abspath(str(source[0])),
+        '/p:Configuration=Release',
+        '/p:OutputPath=' + output_path
+    ]
+
+    msbuild_env = os.environ.copy()
+
+    # Needed when running from Developer Command Prompt for VS
+    if 'PLATFORM' in msbuild_env:
+        del msbuild_env['PLATFORM']
+
+    msbuild_alt_paths = [ 'xbuild' ]
+
+    while True:
+        try:
+            subprocess.check_call(msbuild_args, env = msbuild_env)
+            break
+        except subprocess.CalledProcessError:
+            raise RuntimeError('GodotSharpTools build failed')
+        except OSError:
+            if os.name != 'nt':
+                if not msbuild_alt_paths:
+                    raise RuntimeError('Could not find commands msbuild or xbuild')
+                # Try xbuild
+                msbuild_args[0] = msbuild_alt_paths.pop(0)
+            else:
+                raise RuntimeError('Could not find command MSBuild.exe')
+
+
+mono_sln_builder = Builder(action = mono_build_solution)
+env.Append(BUILDERS = { 'MonoBuildSolution' : mono_sln_builder })
+env.MonoBuildSolution(
+    os.path.join(Dir('#bin').abspath, 'GodotSharpTools.dll'),
+    'editor/GodotSharpTools/GodotSharpTools.sln'
+)
diff --git a/modules/mono/config.py b/modules/mono/config.py
new file mode 100644
index 00000000000..9de199bb5a5
--- /dev/null
+++ b/modules/mono/config.py
@@ -0,0 +1,143 @@
+
+import imp
+import os
+import sys
+from shutil import copyfile
+
+from SCons.Script import BoolVariable, Environment, Variables
+
+
+monoreg = imp.load_source('mono_reg_utils', 'modules/mono/mono_reg_utils.py')
+
+
+def find_file_in_dir(directory, files, prefix='', extension=''):
+    if not extension.startswith('.'):
+        extension = '.' + extension
+    for curfile in files:
+        if os.path.isfile(os.path.join(directory, prefix + curfile + extension)):
+            return curfile
+
+    return None
+
+
+def can_build(platform):
+    if platform in ["javascript"]:
+        return False # Not yet supported
+    return True
+
+
+def is_enabled():
+    # The module is disabled by default. Use module_mono_enabled=yes to enable it.
+    return False
+
+
+def configure(env):
+    env.use_ptrcall = True
+
+    envvars = Variables()
+    envvars.Add(BoolVariable('mono_static', 'Statically link mono', False))
+    envvars.Update(env)
+
+    mono_static = env['mono_static']
+
+    mono_lib_names = ['mono-2.0-sgen', 'monosgen-2.0']
+
+    if env['platform'] == 'windows':
+        if mono_static:
+            raise RuntimeError('mono-static: Not supported on Windows')
+
+        if env['bits'] == '32':
+            if os.getenv('MONO32_PREFIX'):
+                mono_root = os.getenv('MONO32_PREFIX')
+            elif os.name == 'nt':
+                mono_root = monoreg.find_mono_root_dir()
+        else:
+            if os.getenv('MONO64_PREFIX'):
+                mono_root = os.getenv('MONO64_PREFIX')
+            elif os.name == 'nt':
+                mono_root = monoreg.find_mono_root_dir()
+
+        if mono_root is None:
+            raise RuntimeError('Mono installation directory not found')
+
+        mono_lib_path = os.path.join(mono_root, 'lib')
+
+        env.Append(LIBPATH=mono_lib_path)
+        env.Append(CPPPATH=os.path.join(mono_root, 'include', 'mono-2.0'))
+
+        mono_lib_name = find_file_in_dir(mono_lib_path, mono_lib_names, extension='.lib')
+
+        if mono_lib_name is None:
+            raise RuntimeError('Could not find mono library in: ' + mono_lib_path)
+
+        if os.getenv('VCINSTALLDIR'):
+            env.Append(LINKFLAGS=mono_lib_name + Environment()['LIBSUFFIX'])
+        else:
+            env.Append(LIBS=mono_lib_name)
+
+        mono_bin_path = os.path.join(mono_root, 'bin')
+
+        mono_dll_name = find_file_in_dir(mono_bin_path, mono_lib_names, extension='.dll')
+
+        mono_dll_src = os.path.join(mono_bin_path, mono_dll_name + '.dll')
+        mono_dll_dst = os.path.join('bin', mono_dll_name + '.dll')
+        copy_mono_dll = True
+
+        if not os.path.isdir('bin'):
+            os.mkdir('bin')
+        elif os.path.exists(mono_dll_dst):
+            copy_mono_dll = False
+
+        if copy_mono_dll:
+            copyfile(mono_dll_src, mono_dll_dst)
+    else:
+        mono_root = None
+
+        if env['bits'] == '32':
+            if os.getenv('MONO32_PREFIX'):
+                mono_root = os.getenv('MONO32_PREFIX')
+        else:
+            if os.getenv('MONO64_PREFIX'):
+                mono_root = os.getenv('MONO64_PREFIX')
+
+        if mono_root is not None:
+            mono_lib_path = os.path.join(mono_root, 'lib')
+
+            env.Append(LIBPATH=mono_lib_path)
+            env.Append(CPPPATH=os.path.join(mono_root, 'include', 'mono-2.0'))
+
+            mono_lib = find_file_in_dir(mono_lib_path, mono_lib_names, prefix='lib', extension='.a')
+
+            if mono_lib is None:
+                raise RuntimeError('Could not find mono library in: ' + mono_lib_path)
+
+            env.Append(CPPFLAGS=['-D_REENTRANT'])
+
+            if mono_static:
+                mono_lib_file = os.path.join(mono_lib_path, 'lib' + mono_lib + '.a')
+
+                if sys.platform == "darwin":
+                    env.Append(LINKFLAGS=['-Wl,-force_load,' + mono_lib_file])
+                elif sys.platform == "linux" or sys.platform == "linux2":
+                    env.Append(LINKFLAGS=['-Wl,-whole-archive', mono_lib_file, '-Wl,-no-whole-archive'])
+                else:
+                    raise RuntimeError('mono-static: Not supported on this platform')
+            else:
+                env.Append(LIBS=[mono_lib])
+
+            env.Append(LIBS=['m', 'rt', 'dl', 'pthread'])
+        else:
+            if mono_static:
+                raise RuntimeError('mono-static: Not supported with pkg-config. Specify a mono prefix manually')
+
+            env.ParseConfig('pkg-config mono-2 --cflags --libs')
+
+        env.Append(LINKFLAGS='-rdynamic')
+
+
+def get_doc_classes():
+    return ["@C#", "CSharpScript", "GodotSharp"]
+
+
+def get_doc_path():
+    return "doc_classes"
diff --git a/modules/mono/csharp_script.cpp b/modules/mono/csharp_script.cpp
new file mode 100644
index 00000000000..67b4e67e2b9
--- /dev/null
+++ b/modules/mono/csharp_script.cpp
@@ -0,0 +1,1853 @@
+/*************************************************************************/
+/*  csharp_script.cpp                                                    */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2017 Godot Engine contributors (cf. AUTHORS.md)    */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+#include "csharp_script.h"
+
+#include <mono/metadata/threads.h>
+
+#include "os/file_access.h"
+#include "os/os.h"
+#include "os/thread.h"
+#include "project_settings.h"
+
+#ifdef TOOLS_ENABLED
+#include "editor/bindings_generator.h"
+#include "editor/csharp_project.h"
+#include "editor/editor_node.h"
+#include "editor/godotsharp_editor.h"
+#endif
+
+#include "godotsharp_dirs.h"
+#include "mono_gd/gd_mono_class.h"
+#include "mono_gd/gd_mono_marshal.h"
+#include "signal_awaiter_utils.h"
+
+#define CACHED_STRING_NAME(m_var) (CSharpLanguage::get_singleton()->string_names.m_var)
+
+CSharpLanguage *CSharpLanguage::singleton = NULL;
+
+String CSharpLanguage::get_name() const {
+
+	return "C#";
+}
+
+String CSharpLanguage::get_type() const {
+
+	return "CSharpScript";
+}
+
+String CSharpLanguage::get_extension() const {
+
+	return "cs";
+}
+
+Error CSharpLanguage::execute_file(const String &p_path) {
+
+	// ??
+	return OK;
+}
+
+#ifdef TOOLS_ENABLED
+void gdsharp_editor_init_callback() {
+
+	EditorNode *editor = EditorNode::get_singleton();
+	editor->add_child(memnew(GodotSharpEditor(editor)));
+}
+#endif
+
+void CSharpLanguage::init() {
+
+	gdmono = memnew(GDMono);
+	gdmono->initialize();
+
+#ifdef MONO_GLUE_DISABLED
+	WARN_PRINT("This binary is built with `mono_glue=no` and cannot be used for scripting");
+#endif
+
+#if defined(TOOLS_ENABLED) && defined(DEBUG_METHODS_ENABLED)
+	if (gdmono->get_editor_tools_assembly() != NULL) {
+		List<String> cmdline_args = OS::get_singleton()->get_cmdline_args();
+		BindingsGenerator::handle_cmdline_args(cmdline_args);
+	}
+#endif
+
+#ifdef TOOLS_ENABLED
+	EditorNode::add_init_callback(&gdsharp_editor_init_callback);
+#endif
+}
+
+void CSharpLanguage::finish() {
+
+	if (gdmono) {
+		memdelete(gdmono);
+		gdmono = NULL;
+	}
+}
+
+void CSharpLanguage::get_reserved_words(List<String> *p_words) const {
+
+	static const char *_reserved_words[] = {
+		// Reserved keywords
+		"abstract",
+		"as",
+		"base",
+		"bool",
+		"break",
+		"byte",
+		"case",
+		"catch",
+		"char",
+		"checked",
+		"class",
+		"const",
+		"continue",
+		"decimal",
+		"default",
+		"delegate",
+		"do",
+		"double",
+		"else",
+		"enum",
+		"event",
+		"explicit",
+		"extern",
+		"false",
+		"finally",
+		"fixed",
+		"float",
+		"for",
+		"forech",
+		"goto",
+		"if",
+		"implicit",
+		"in",
+		"int",
+		"interface",
+		"internal",
+		"is",
+		"lock",
+		"long",
+		"namespace",
+		"new",
+		"null",
+		"object",
+		"operator",
+		"out",
+		"override",
+		"params",
+		"private",
+		"protected",
+		"public",
+		"readonly",
+		"ref",
+		"return",
+		"sbyte",
+		"sealed",
+		"short",
+		"sizeof",
+		"stackalloc",
+		"static",
+		"string",
+		"struct",
+		"switch",
+		"this",
+		"throw",
+		"true",
+		"try",
+		"typeof",
+		"uint",
+		"ulong",
+		"unchecked",
+		"unsafe",
+		"ushort",
+		"using",
+		"virtual",
+		"volatile",
+		"void",
+		"while",
+
+		// Contextual keywords. Not reserved words, but I guess we should include
+		// them because this seems to be used only for syntax highlighting.
+		"add",
+		"ascending",
+		"by",
+		"descending",
+		"dynamic",
+		"equals",
+		"from",
+		"get",
+		"global",
+		"group",
+		"in",
+		"into",
+		"join",
+		"let",
+		"on",
+		"orderby",
+		"partial",
+		"remove",
+		"select",
+		"set",
+		"value",
+		"var",
+		"where",
+		"yield",
+		0
+	};
+
+	const char **w = _reserved_words;
+
+	while (*w) {
+		p_words->push_back(*w);
+		w++;
+	}
+}
+
+void CSharpLanguage::get_comment_delimiters(List<String> *p_delimiters) const {
+
+	p_delimiters->push_back("//"); // single-line comment
+	p_delimiters->push_back("/* */"); // delimited comment
+}
+
+void CSharpLanguage::get_string_delimiters(List<String> *p_delimiters) const {
+
+	p_delimiters->push_back("' '"); // character literal
+	p_delimiters->push_back("\" \""); // regular string literal
+	p_delimiters->push_back("@\" \""); // verbatim string literal
+}
+
+Ref<Script> CSharpLanguage::get_template(const String &p_class_name, const String &p_base_class_name) const {
+
+	String script_template = "using " BINDINGS_NAMESPACE ";\n"
+							 "using System;\n"
+							 "\n"
+							 "public class %CLASS_NAME% : %BASE_CLASS_NAME%\n"
+							 "{\n"
+							 "    // Member variables here, example:\n"
+							 "    // private int a = 2;\n"
+							 "    // private string b = \"textvar\";\n"
+							 "\n"
+							 "    public override void _Ready()\n"
+							 "    {\n"
+							 "        // Called every time the node is added to the scene.\n"
+							 "        // Initialization here\n"
+							 "        \n"
+							 "    }\n"
+							 "}\n";
+
+	script_template = script_template.replace("%BASE_CLASS_NAME%", p_base_class_name).replace("%CLASS_NAME%", p_class_name);
+
+	Ref<CSharpScript> script;
+	script.instance();
+	script->set_source_code(script_template);
+
+	return script;
+}
+
+Script *CSharpLanguage::create_script() const {
+
+	return memnew(CSharpScript);
+}
+
+bool CSharpLanguage::has_named_classes() const {
+
+	return true;
+}
+
+String CSharpLanguage::make_function(const String &p_class, const String &p_name, const PoolStringArray &p_args) const {
+
+	// FIXME
+	// Due to Godot's API limitation this just appends the function to the end of the file
+	// Another limitation is that the parameter types are not specified, so we must use System.Object
+	String s = "private void " + p_name + "(";
+	for (int i = 0; i < p_args.size(); i++) {
+		if (i > 0)
+			s += ", ";
+		s += "object " + p_args[i];
+	}
+	s += ")\n{\n    // Replace with function body\n}\n";
+
+	return s;
+}
+
+void CSharpLanguage::frame() {
+
+	const Ref<MonoGCHandle> &task_scheduler_handle = GDMonoUtils::mono_cache.task_scheduler_handle;
+
+	if (task_scheduler_handle.is_valid()) {
+		MonoObject *task_scheduler = task_scheduler_handle->get_target();
+
+		if (task_scheduler) {
+			GDMonoUtils::GodotTaskScheduler_Activate thunk = CACHED_METHOD_THUNK(GodotTaskScheduler, Activate);
+
+			ERR_FAIL_NULL(thunk);
+
+			MonoObject *ex;
+			thunk(task_scheduler, &ex);
+
+			if (ex) {
+				mono_print_unhandled_exception(ex);
+				ERR_FAIL();
+			}
+		}
+	}
+}
+
+struct CSharpScriptDepSort {
+
+	// must support sorting so inheritance works properly (parent must be reloaded first)
+	bool operator()(const Ref<CSharpScript> &A, const Ref<CSharpScript> &B) const {
+		if (A == B)
+			return false; // shouldn't happen but..
+		GDMonoClass *I = B->base;
+		while (I) {
+			if (I == A->script_class) {
+				// A is a base of B
+				return true;
+			}
+
+			I = I->get_parent_class();
+		}
+
+		return false; // not a base
+	}
+};
+
+void CSharpLanguage::reload_all_scripts() {
+
+#ifdef DEBUG_ENABLED
+
+#ifndef NO_THREADS
+	lock->lock();
+#endif
+
+	List<Ref<CSharpScript> > scripts;
+
+	SelfList<CSharpScript> *elem = script_list.first();
+	while (elem) {
+		if (elem->self()->get_path().is_resource_file()) {
+			scripts.push_back(Ref<CSharpScript>(elem->self())); //cast to gdscript to avoid being erased by accident
+		}
+		elem = elem->next();
+	}
+
+#ifndef NO_THREADS
+	lock->unlock();
+#endif
+
+	//as scripts are going to be reloaded, must proceed without locking here
+
+	scripts.sort_custom<CSharpScriptDepSort>(); //update in inheritance dependency order
+
+	for (List<Ref<CSharpScript> >::Element *E = scripts.front(); E; E = E->next()) {
+		E->get()->load_source_code(E->get()->get_path());
+		E->get()->reload(true);
+	}
+#endif
+}
+
+void CSharpLanguage::reload_tool_script(const Ref<Script> &p_script, bool p_soft_reload) {
+
+	(void)p_script; // UNUSED
+
+#ifdef TOOLS_ENABLED
+	reload_assemblies_if_needed(p_soft_reload);
+#endif
+}
+
+#ifdef TOOLS_ENABLED
+void CSharpLanguage::reload_assemblies_if_needed(bool p_soft_reload) {
+
+	if (gdmono->is_runtime_initialized()) {
+
+		GDMonoAssembly *proj_assembly = gdmono->get_project_assembly();
+
+		if (proj_assembly) {
+			String proj_asm_path = proj_assembly->get_path();
+
+			if (!FileAccess::exists(proj_assembly->get_path())) {
+				// Maybe it wasn't loaded from the default path, so check this as well
+				String proj_asm_name = ProjectSettings::get_singleton()->get("application/config/name");
+				proj_asm_path = GodotSharpDirs::get_res_temp_assemblies_dir().plus_file(proj_asm_name);
+				if (!FileAccess::exists(proj_asm_path))
+					return; // No assembly to load
+			}
+
+			if (FileAccess::get_modified_time(proj_asm_path) <= proj_assembly->get_modified_time())
+				return; // Already up to date
+		} else {
+			String proj_asm_name = ProjectSettings::get_singleton()->get("application/config/name");
+			if (!FileAccess::exists(GodotSharpDirs::get_res_temp_assemblies_dir().plus_file(proj_asm_name)))
+				return; // No assembly to load
+		}
+	}
+
+#ifndef NO_THREADS
+	lock->lock();
+#endif
+
+	List<Ref<CSharpScript> > scripts;
+
+	SelfList<CSharpScript> *elem = script_list.first();
+	while (elem) {
+		if (elem->self()->get_path().is_resource_file()) {
+
+			scripts.push_back(Ref<CSharpScript>(elem->self())); //cast to CSharpScript to avoid being erased by accident
+		}
+		elem = elem->next();
+	}
+
+#ifndef NO_THREADS
+	lock->unlock();
+#endif
+
+	//when someone asks you why dynamically typed languages are easier to write....
+
+	Map<Ref<CSharpScript>, Map<ObjectID, List<Pair<StringName, Variant> > > > to_reload;
+
+	//as scripts are going to be reloaded, must proceed without locking here
+
+	scripts.sort_custom<CSharpScriptDepSort>(); //update in inheritance dependency order
+
+	for (List<Ref<CSharpScript> >::Element *E = scripts.front(); E; E = E->next()) {
+
+		to_reload.insert(E->get(), Map<ObjectID, List<Pair<StringName, Variant> > >());
+
+		if (!p_soft_reload) {
+
+			//save state and remove script from instances
+			Map<ObjectID, List<Pair<StringName, Variant> > > &map = to_reload[E->get()];
+
+			while (E->get()->instances.front()) {
+				Object *obj = E->get()->instances.front()->get();
+				//save instance info
+				List<Pair<StringName, Variant> > state;
+				if (obj->get_script_instance()) {
+
+					obj->get_script_instance()->get_property_state(state);
+
+					Ref<MonoGCHandle> gchandle = CAST_CSHARP_INSTANCE(obj->get_script_instance())->gchandle;
+					if (gchandle.is_valid())
+						gchandle->release();
+
+					map[obj->get_instance_id()] = state;
+					obj->set_script(RefPtr());
+				}
+			}
+
+			//same thing for placeholders
+			while (E->get()->placeholders.size()) {
+
+				Object *obj = E->get()->placeholders.front()->get()->get_owner();
+				//save instance info
+				List<Pair<StringName, Variant> > state;
+				if (obj->get_script_instance()) {
+					obj->get_script_instance()->get_property_state(state);
+					map[obj->get_instance_id()] = state;
+					obj->set_script(RefPtr());
+				}
+			}
+
+			for (Map<ObjectID, List<Pair<StringName, Variant> > >::Element *F = E->get()->pending_reload_state.front(); F; F = F->next()) {
+				map[F->key()] = F->get(); //pending to reload, use this one instead
+			}
+
+			E->get()->_clear();
+		}
+	}
+
+	if (gdmono->reload_scripts_domain() != OK)
+		return;
+
+	for (Map<Ref<CSharpScript>, Map<ObjectID, List<Pair<StringName, Variant> > > >::Element *E = to_reload.front(); E; E = E->next()) {
+
+		Ref<CSharpScript> scr = E->key();
+		scr->exports_invalidated = true;
+		scr->reload(p_soft_reload);
+		scr->update_exports();
+
+		//restore state if saved
+		for (Map<ObjectID, List<Pair<StringName, Variant> > >::Element *F = E->get().front(); F; F = F->next()) {
+
+			Object *obj = ObjectDB::get_instance(F->key());
+			if (!obj)
+				continue;
+
+			if (!p_soft_reload) {
+				//clear it just in case (may be a pending reload state)
+				obj->set_script(RefPtr());
+			}
+			obj->set_script(scr.get_ref_ptr());
+			if (!obj->get_script_instance()) {
+				//failed, save reload state for next time if not saved
+				if (!scr->pending_reload_state.has(obj->get_instance_id())) {
+					scr->pending_reload_state[obj->get_instance_id()] = F->get();
+				}
+				continue;
+			}
+
+			for (List<Pair<StringName, Variant> >::Element *G = F->get().front(); G; G = G->next()) {
+				obj->get_script_instance()->set(G->get().first, G->get().second);
+			}
+
+			scr->pending_reload_state.erase(obj->get_instance_id()); //as it reloaded, remove pending state
+		}
+
+		//if instance states were saved, set them!
+	}
+}
+#endif
+
+void CSharpLanguage::get_recognized_extensions(List<String> *p_extensions) const {
+
+	p_extensions->push_back("cs");
+}
+
+#ifdef TOOLS_ENABLED
+Error CSharpLanguage::open_in_external_editor(const Ref<Script> &p_script, int p_line, int p_col) {
+
+	return GodotSharpEditor::get_singleton()->open_in_external_editor(p_script, p_line, p_col);
+}
+
+bool CSharpLanguage::overrides_external_editor() {
+
+	return GodotSharpEditor::get_singleton()->overrides_external_editor();
+}
+#endif
+
+void CSharpLanguage::thread_enter() {
+
+#if 0
+	if (mono->is_runtime_initialized()) {
+		GDMonoUtils::attach_current_thread();
+	}
+#endif
+}
+
+void CSharpLanguage::thread_exit() {
+
+#if 0
+	if (mono->is_runtime_initialized()) {
+		GDMonoUtils::detach_current_thread();
+	}
+#endif
+}
+
+bool CSharpLanguage::debug_break_parse(const String &p_file, int p_line, const String &p_error) {
+
+	// Break because of parse error
+	if (ScriptDebugger::get_singleton() && Thread::get_caller_id() == Thread::get_main_id()) {
+		// TODO
+		//_debug_parse_err_line = p_line;
+		//_debug_parse_err_file = p_file;
+		//_debug_error = p_error;
+		ScriptDebugger::get_singleton()->debug(this, false);
+		return true;
+	} else {
+		return false;
+	}
+}
+
+bool CSharpLanguage::debug_break(const String &p_error, bool p_allow_continue) {
+
+	if (ScriptDebugger::get_singleton() && Thread::get_caller_id() == Thread::get_main_id()) {
+		// TODO
+		//_debug_parse_err_line = -1;
+		//_debug_parse_err_file = "";
+		//_debug_error = p_error;
+		ScriptDebugger::get_singleton()->debug(this, p_allow_continue);
+		return true;
+	} else {
+		return false;
+	}
+}
+
+void CSharpLanguage::set_language_index(int p_idx) {
+
+	ERR_FAIL_COND(lang_idx != -1);
+	lang_idx = p_idx;
+}
+
+CSharpLanguage::CSharpLanguage() {
+
+	ERR_FAIL_COND(singleton);
+	singleton = this;
+
+	gdmono = NULL;
+
+#ifdef NO_THREADS
+	lock = NULL;
+	gchandle_bind_lock = NULL;
+#else
+	lock = Mutex::create();
+	script_bind_lock = Mutex::create();
+#endif
+
+	lang_idx = -1;
+}
+
+CSharpLanguage::~CSharpLanguage() {
+
+	finish();
+
+	if (lock) {
+		memdelete(lock);
+		lock = NULL;
+	}
+
+	if (script_bind_lock) {
+		memdelete(script_bind_lock);
+		script_bind_lock = NULL;
+	}
+
+	singleton = NULL;
+}
+
+void *CSharpLanguage::alloc_instance_binding_data(Object *p_object) {
+
+#ifdef DEBUG_ENABLED
+	// I don't trust you
+	if (p_object->get_script_instance())
+		CRASH_COND(NULL != CAST_CSHARP_INSTANCE(p_object->get_script_instance()));
+#endif
+
+	StringName type_name = p_object->get_class_name();
+
+	GDMonoClass *type_class = GDMonoUtils::type_get_proxy_class(type_name);
+
+	ERR_FAIL_NULL_V(type_class, NULL);
+
+	MonoObject *mono_object = GDMonoUtils::create_managed_for_godot_object(type_class, type_name, p_object);
+
+	ERR_FAIL_NULL_V(mono_object, NULL);
+
+	// Tie managed to unmanaged
+	bool strong_handle = true;
+	Reference *ref = Object::cast_to<Reference>(p_object);
+
+	if (ref) {
+		strong_handle = false;
+
+		// Unsafe refcount increment. The managed instance also counts as a reference.
+		// This way if the unmanaged world has no references to our owner
+		// but the managed instance is alive, the refcount will be 1 instead of 0.
+		// See: _GodotSharp::_dispose_object(Object *p_object)
+
+		ref->reference();
+	}
+
+	Ref<MonoGCHandle> gchandle = strong_handle ? MonoGCHandle::create_strong(mono_object) :
+												 MonoGCHandle::create_weak(mono_object);
+
+#ifndef NO_THREADS
+	script_bind_lock->lock();
+#endif
+
+	void *data = (void *)gchandle_bindings.insert(p_object, gchandle);
+
+#ifndef NO_THREADS
+	script_bind_lock->unlock();
+#endif
+
+	return data;
+}
+
+void CSharpLanguage::free_instance_binding_data(void *p_data) {
+
+#ifndef NO_THREADS
+	script_bind_lock->lock();
+#endif
+
+	gchandle_bindings.erase((Map<Object *, Ref<MonoGCHandle> >::Element *)p_data);
+
+#ifndef NO_THREADS
+	script_bind_lock->unlock();
+#endif
+}
+
+void CSharpInstance::_ml_call_reversed(GDMonoClass *klass, const StringName &p_method, const Variant **p_args, int p_argcount) {
+
+	GDMonoClass *base = klass->get_parent_class();
+	if (base && base != script->native)
+		_ml_call_reversed(base, p_method, p_args, p_argcount);
+
+	GDMonoMethod *method = klass->get_method(p_method, p_argcount);
+
+	if (method) {
+		method->invoke(get_mono_object(), p_args);
+	}
+}
+
+CSharpInstance *CSharpInstance::create_for_managed_type(Object *p_owner, CSharpScript *p_script, const Ref<MonoGCHandle> &p_gchandle) {
+
+	CSharpInstance *instance = memnew(CSharpInstance);
+
+	Reference *ref = Object::cast_to<Reference>(p_owner);
+
+	instance->base_ref = ref != NULL;
+	instance->script = Ref<CSharpScript>(p_script);
+	instance->owner = p_owner;
+	instance->gchandle = p_gchandle;
+
+	if (instance->base_ref)
+		instance->_reference_owner_unsafe();
+
+	p_script->instances.insert(p_owner);
+
+	return instance;
+}
+
+MonoObject *CSharpInstance::get_mono_object() const {
+#ifdef DEBUG_ENABLED
+	CRASH_COND(gchandle.is_null());
+#endif
+	return gchandle->get_target();
+}
+
+bool CSharpInstance::set(const StringName &p_name, const Variant &p_value) {
+
+	ERR_FAIL_COND_V(!script.is_valid(), false);
+
+	GDMonoClass *top = script->script_class;
+
+	while (top && top != script->native) {
+		GDMonoField *field = script->script_class->get_field(p_name);
+
+		if (field) {
+			MonoObject *mono_object = get_mono_object();
+
+			ERR_EXPLAIN("Reference has been garbage collected?");
+			ERR_FAIL_NULL_V(mono_object, false);
+
+			field->set_value(mono_object, p_value);
+
+			return true;
+		}
+
+		top = top->get_parent_class();
+	}
+
+	// Call _set
+
+	Variant name = p_name;
+	const Variant *args[2] = { &name, &p_value };
+
+	MonoObject *mono_object = get_mono_object();
+	top = script->script_class;
+
+	while (top && top != script->native) {
+		GDMonoMethod *method = top->get_method(CACHED_STRING_NAME(_set), 2);
+
+		if (method) {
+			MonoObject *ret = method->invoke(mono_object, args);
+
+			if (ret && UNBOX_BOOLEAN(ret))
+				return true;
+		}
+
+		top = top->get_parent_class();
+	}
+
+	return false;
+}
+
+bool CSharpInstance::get(const StringName &p_name, Variant &r_ret) const {
+
+	ERR_FAIL_COND_V(!script.is_valid(), false);
+
+	GDMonoClass *top = script->script_class;
+
+	while (top && top != script->native) {
+		GDMonoField *field = top->get_field(p_name);
+
+		if (field) {
+			MonoObject *mono_object = get_mono_object();
+
+			ERR_EXPLAIN("Reference has been garbage collected?");
+			ERR_FAIL_NULL_V(mono_object, false);
+
+			MonoObject *value = field->get_value(mono_object);
+			r_ret = GDMonoMarshal::mono_object_to_variant(value, field->get_type());
+			return true;
+		}
+
+		// Call _get
+
+		GDMonoMethod *method = top->get_method(CACHED_STRING_NAME(_get), 1);
+
+		if (method) {
+			Variant name = p_name;
+			const Variant *args[1] = { &name };
+
+			MonoObject *ret = method->invoke(get_mono_object(), args);
+
+			if (ret) {
+				r_ret = GDMonoMarshal::mono_object_to_variant(ret);
+				return true;
+			}
+		}
+
+		top = top->get_parent_class();
+	}
+
+	return false;
+}
+
+void CSharpInstance::get_property_list(List<PropertyInfo> *p_properties) const {
+
+	for (Map<StringName, PropertyInfo>::Element *E = script->member_info.front(); E; E = E->next()) {
+		p_properties->push_back(E->value());
+	}
+}
+
+Variant::Type CSharpInstance::get_property_type(const StringName &p_name, bool *r_is_valid) const {
+
+	if (script->member_info.has(p_name)) {
+		if (r_is_valid)
+			*r_is_valid = true;
+		return script->member_info[p_name].type;
+	}
+
+	if (r_is_valid)
+		*r_is_valid = false;
+
+	return Variant::NIL;
+}
+
+bool CSharpInstance::has_method(const StringName &p_method) const {
+
+	if (!script.is_valid())
+		return false;
+
+	GDMonoClass *top = script->script_class;
+
+	while (top && top != script->native) {
+		if (top->has_method(p_method)) {
+			return true;
+		}
+
+		top = top->get_parent_class();
+	}
+
+	return false;
+}
+
+Variant CSharpInstance::call(const StringName &p_method, const Variant **p_args, int p_argcount, Variant::CallError &r_error) {
+
+	MonoObject *mono_object = get_mono_object();
+
+	ERR_EXPLAIN("Reference has been garbage collected?");
+	ERR_FAIL_NULL_V(mono_object, Variant());
+
+	if (!script.is_valid())
+		return Variant();
+
+	GDMonoClass *top = script->script_class;
+
+	while (top && top != script->native) {
+		GDMonoMethod *method = top->get_method(p_method, p_argcount);
+
+		if (method) {
+			MonoObject *return_value = method->invoke(mono_object, p_args);
+
+			if (return_value) {
+				return GDMonoMarshal::mono_object_to_variant(return_value, method->get_return_type());
+			} else {
+				return Variant();
+			}
+		} else if (p_method == CACHED_STRING_NAME(_awaited_signal_callback)) {
+			// shitty hack..
+			// TODO move to its own function, thx
+
+			if (p_argcount < 1) {
+				r_error.error = Variant::CallError::CALL_ERROR_TOO_FEW_ARGUMENTS;
+				r_error.argument = 1;
+				return Variant();
+			}
+
+			Ref<SignalAwaiterHandle> awaiter = *p_args[p_argcount - 1];
+
+			if (awaiter.is_null()) {
+				r_error.error = Variant::CallError::CALL_ERROR_INVALID_ARGUMENT;
+				r_error.argument = p_argcount - 1;
+				r_error.expected = Variant::OBJECT;
+				return Variant();
+			}
+
+			awaiter->set_completed(true);
+
+			int extra_argc = p_argcount - 1;
+			MonoArray *extra_args = mono_array_new(SCRIPTS_DOMAIN, CACHED_CLASS_RAW(MonoObject), extra_argc);
+
+			for (int i = 0; i < extra_argc; i++) {
+				MonoObject *boxed = GDMonoMarshal::variant_to_mono_object(*p_args[i]);
+				mono_array_set(extra_args, MonoObject *, i, boxed);
+			}
+
+			GDMonoUtils::GodotObject__AwaitedSignalCallback thunk = CACHED_METHOD_THUNK(GodotObject, _AwaitedSignalCallback);
+
+			MonoObject *ex = NULL;
+			thunk(mono_object, &extra_args, awaiter->get_target(), &ex);
+
+			if (ex) {
+				mono_print_unhandled_exception(ex);
+				ERR_FAIL_V(Variant());
+			}
+
+			return Variant();
+		}
+
+		top = top->get_parent_class();
+	}
+
+	r_error.error = Variant::CallError::CALL_ERROR_INVALID_METHOD;
+
+	return Variant();
+}
+
+void CSharpInstance::call_multilevel(const StringName &p_method, const Variant **p_args, int p_argcount) {
+
+	if (script.is_valid()) {
+		MonoObject *mono_object = get_mono_object();
+
+		GDMonoClass *top = script->script_class;
+
+		while (top && top != script->native) {
+			GDMonoMethod *method = top->get_method(p_method, p_argcount);
+
+			if (method)
+				method->invoke(mono_object, p_args);
+
+			top = top->get_parent_class();
+		}
+	}
+}
+
+void CSharpInstance::call_multilevel_reversed(const StringName &p_method, const Variant **p_args, int p_argcount) {
+
+	if (script.is_valid()) {
+		_ml_call_reversed(script->script_class, p_method, p_args, p_argcount);
+	}
+}
+
+void CSharpInstance::_reference_owner_unsafe() {
+
+#ifdef DEBUG_ENABLED
+	CRASH_COND(!base_ref);
+#endif
+
+	// Unsafe refcount increment. The managed instance also counts as a reference.
+	// This way if the unmanaged world has no references to our owner
+	// but the managed instance is alive, the refcount will be 1 instead of 0.
+	// See: _unreference_owner_unsafe()
+
+	// May not me referenced yet, so we must use init_ref() instead of reference()
+	Object::cast_to<Reference>(owner)->init_ref();
+}
+
+void CSharpInstance::_unreference_owner_unsafe() {
+
+#ifdef DEBUG_ENABLED
+	CRASH_COND(!base_ref);
+#endif
+
+	// Called from CSharpInstance::mono_object_disposed() or ~CSharpInstance()
+
+	// Unsafe refcount decrement. The managed instance also counts as a reference.
+	// See: _reference_owner_unsafe()
+
+	if (Object::cast_to<Reference>(owner)->unreference()) {
+		memdelete(owner);
+		owner = NULL;
+	}
+}
+
+void CSharpInstance::mono_object_disposed() {
+
+	if (base_ref)
+		_unreference_owner_unsafe();
+}
+
+void CSharpInstance::refcount_incremented() {
+
+	CRASH_COND(!base_ref);
+
+	Reference *ref_owner = Object::cast_to<Reference>(owner);
+
+	if (ref_owner->reference_get_count() > 1) { // Remember the managed side holds a reference, hence 1 instead of 0 here
+		// The reference count was increased after the managed side was the only one referencing our owner.
+		// This means the owner is being referenced again by the unmanaged side,
+		// so the owner must hold the managed side alive again to avoid it from being GCed.
+
+		// Release the current weak handle and replace it with a strong handle.
+		uint32_t strong_gchandle = MonoGCHandle::make_strong_handle(gchandle->get_target());
+		gchandle->release();
+		gchandle->set_handle(strong_gchandle);
+	}
+}
+
+bool CSharpInstance::refcount_decremented() {
+
+	CRASH_COND(!base_ref);
+
+	Reference *ref_owner = Object::cast_to<Reference>(owner);
+
+	int refcount = ref_owner->reference_get_count();
+
+	if (refcount == 1) { // Remember the managed side holds a reference, hence 1 instead of 0 here
+		// If owner owner is no longer referenced by the unmanaged side,
+		// the managed instance takes responsibility of deleting the owner when GCed.
+
+		// Release the current strong handle and replace it with a weak handle.
+		uint32_t weak_gchandle = MonoGCHandle::make_weak_handle(gchandle->get_target());
+		gchandle->release();
+		gchandle->set_handle(weak_gchandle);
+
+		return false;
+	}
+
+	ref_dying = (refcount == 0);
+
+	return ref_dying;
+}
+
+ScriptInstance::RPCMode CSharpInstance::get_rpc_mode(const StringName &p_method) const {
+
+	GDMonoClass *top = script->script_class;
+
+	while (top && top != script->native) {
+		GDMonoMethod *method = top->get_method(p_method);
+
+		if (method) { // TODO should we reject static methods?
+			// TODO cache result
+			if (method->has_attribute(CACHED_CLASS(RemoteAttribute)))
+				return RPC_MODE_REMOTE;
+			if (method->has_attribute(CACHED_CLASS(SyncAttribute)))
+				return RPC_MODE_SYNC;
+			if (method->has_attribute(CACHED_CLASS(MasterAttribute)))
+				return RPC_MODE_MASTER;
+			if (method->has_attribute(CACHED_CLASS(SlaveAttribute)))
+				return RPC_MODE_SLAVE;
+		}
+
+		top = top->get_parent_class();
+	}
+
+	return RPC_MODE_DISABLED;
+}
+
+ScriptInstance::RPCMode CSharpInstance::get_rset_mode(const StringName &p_variable) const {
+
+	GDMonoClass *top = script->script_class;
+
+	while (top && top != script->native) {
+		GDMonoField *field = top->get_field(p_variable);
+
+		if (field) { // TODO should we reject static fields?
+			// TODO cache result
+			if (field->has_attribute(CACHED_CLASS(RemoteAttribute)))
+				return RPC_MODE_REMOTE;
+			if (field->has_attribute(CACHED_CLASS(SyncAttribute)))
+				return RPC_MODE_SYNC;
+			if (field->has_attribute(CACHED_CLASS(MasterAttribute)))
+				return RPC_MODE_MASTER;
+			if (field->has_attribute(CACHED_CLASS(SlaveAttribute)))
+				return RPC_MODE_SLAVE;
+		}
+
+		top = top->get_parent_class();
+	}
+
+	return RPC_MODE_DISABLED;
+}
+
+void CSharpInstance::notification(int p_notification) {
+
+	Variant value = p_notification;
+	const Variant *args[1] = { &value };
+
+	call_multilevel(CACHED_STRING_NAME(_notification), args, 1);
+}
+
+Ref<Script> CSharpInstance::get_script() const {
+
+	return script;
+}
+
+ScriptLanguage *CSharpInstance::get_language() {
+
+	return CSharpLanguage::get_singleton();
+}
+
+CSharpInstance::CSharpInstance() {
+
+	owner = NULL;
+	base_ref = false;
+	ref_dying = false;
+}
+
+CSharpInstance::~CSharpInstance() {
+
+	if (gchandle.is_valid()) {
+		gchandle->release(); // Make sure it's released
+	}
+
+	if (base_ref && !ref_dying) { // it may be called from the owner's destructor
+#ifdef DEBUG_ENABLED
+		CRASH_COND(!owner); // dunno, just in case
+#endif
+		_unreference_owner_unsafe();
+	}
+
+	if (script.is_valid() && owner) {
+#ifndef NO_THREADS
+		CSharpLanguage::singleton->lock->lock();
+#endif
+
+#ifdef DEBUG_ENABLED
+		// CSharpInstance must not be created unless it's going to be added to the list for sure
+		Set<Object *>::Element *match = script->instances.find(owner);
+		CRASH_COND(!match);
+		script->instances.erase(match);
+#else
+		script->instances.erase(owner);
+#endif
+
+#ifndef NO_THREADS
+		CSharpLanguage::singleton->lock->unlock();
+#endif
+	}
+}
+
+#ifdef TOOLS_ENABLED
+void CSharpScript::_placeholder_erased(PlaceHolderScriptInstance *p_placeholder) {
+
+	placeholders.erase(p_placeholder);
+}
+#endif
+
+#ifdef TOOLS_ENABLED
+void CSharpScript::_update_exports_values(Map<StringName, Variant> &values, List<PropertyInfo> &propnames) {
+
+	if (base_cache.is_valid()) {
+		base_cache->_update_exports_values(values, propnames);
+	}
+
+	for (Map<StringName, Variant>::Element *E = exported_members_defval_cache.front(); E; E = E->next()) {
+		values[E->key()] = E->get();
+	}
+
+	for (List<PropertyInfo>::Element *E = exported_members_cache.front(); E; E = E->next()) {
+		propnames.push_back(E->get());
+	}
+}
+#endif
+
+bool CSharpScript::_update_exports() {
+
+#ifdef TOOLS_ENABLED
+	if (!valid)
+		return false;
+
+	bool changed = false;
+
+	if (exports_invalidated) {
+		exports_invalidated = false;
+
+		changed = true;
+
+		member_info.clear();
+		exported_members_cache.clear();
+		exported_members_defval_cache.clear();
+
+		const Vector<GDMonoField *> &fields = script_class->get_all_fields();
+
+		// We are creating a temporary new instance of the class here to get the default value
+		// TODO Workaround. Should be replaced with IL opcodes analysis
+
+		MonoObject *tmp_object = mono_object_new(SCRIPTS_DOMAIN, script_class->get_raw());
+
+		if (tmp_object) {
+			CACHED_FIELD(GodotObject, ptr)->set_value_raw(tmp_object, tmp_object); // FIXME WTF is this workaround
+
+			GDMonoMethod *ctor = script_class->get_method(CACHED_STRING_NAME(dotctor), 0);
+			MonoObject *ex = NULL;
+			ctor->invoke(tmp_object, NULL, &ex);
+
+			if (ex) {
+				ERR_PRINT("Exception thrown from constructor of temporary MonoObject:");
+				mono_print_unhandled_exception(ex);
+				tmp_object = NULL;
+				ERR_FAIL_V(false);
+			}
+		} else {
+			ERR_PRINT("Failed to create temporary MonoObject");
+			return false;
+		}
+
+		for (int i = 0; i < fields.size(); i++) {
+			GDMonoField *field = fields[i];
+
+			if (field->is_static() || field->get_visibility() != GDMono::PUBLIC)
+				continue;
+
+			String name = field->get_name();
+			StringName cname = name;
+
+			Variant::Type type = GDMonoMarshal::managed_to_variant_type(field->get_type());
+
+			if (field->has_attribute(CACHED_CLASS(ExportAttribute))) {
+				MonoObject *attr = field->get_attribute(CACHED_CLASS(ExportAttribute));
+
+				// Field has Export attribute
+				int hint = CACHED_FIELD(ExportAttribute, hint)->get_int_value(attr);
+				String hint_string = CACHED_FIELD(ExportAttribute, hint_string)->get_string_value(attr);
+				int usage = CACHED_FIELD(ExportAttribute, usage)->get_int_value(attr);
+
+				PropertyInfo prop_info = PropertyInfo(type, name, PropertyHint(hint), hint_string, PropertyUsageFlags(usage));
+
+				member_info[cname] = prop_info;
+				exported_members_cache.push_back(prop_info);
+
+				if (tmp_object) {
+					exported_members_defval_cache[cname] = GDMonoMarshal::mono_object_to_variant(field->get_value(tmp_object));
+				}
+			} else {
+				member_info[cname] = PropertyInfo(type, name, PROPERTY_HINT_NONE, "", PROPERTY_USAGE_SCRIPT_VARIABLE);
+			}
+		}
+	}
+
+	if (placeholders.size()) {
+		// Update placeholders if any
+		Map<StringName, Variant> values;
+		List<PropertyInfo> propnames;
+		_update_exports_values(values, propnames);
+
+		for (Set<PlaceHolderScriptInstance *>::Element *E = placeholders.front(); E; E = E->next()) {
+			E->get()->update(propnames, values);
+		}
+	}
+
+	return changed;
+#endif
+	return false;
+}
+
+void CSharpScript::_clear() {
+
+	tool = false;
+	valid = false;
+
+	base = NULL;
+	native = NULL;
+	script_class = NULL;
+}
+
+Variant CSharpScript::call(const StringName &p_method, const Variant **p_args, int p_argcount, Variant::CallError &r_error) {
+
+	GDMonoClass *top = script_class;
+
+	while (top && top != native) {
+		GDMonoMethod *method = top->get_method(p_method, p_argcount);
+
+		if (method && method->is_static()) {
+			MonoObject *result = method->invoke(NULL, p_args);
+
+			if (result) {
+				return GDMonoMarshal::mono_object_to_variant(result, method->get_return_type());
+			} else {
+				return Variant();
+			}
+		}
+
+		top = top->get_parent_class();
+	}
+
+	// No static method found. Try regular instance calls
+	return Script::call(p_method, p_args, p_argcount, r_error);
+}
+
+void CSharpScript::_resource_path_changed() {
+
+	String path = get_path();
+
+	if (!path.empty()) {
+		name = get_path().get_file().get_basename();
+	}
+}
+
+void CSharpScript::_bind_methods() {
+
+	ClassDB::bind_vararg_method(METHOD_FLAGS_DEFAULT, "new", &CSharpScript::_new, MethodInfo(Variant::OBJECT, "new"));
+}
+
+Ref<CSharpScript> CSharpScript::create_for_managed_type(GDMonoClass *p_class) {
+
+	// This method should not fail
+
+	CRASH_COND(!p_class);
+
+	Ref<CSharpScript> script = memnew(CSharpScript);
+
+	script->name = p_class->get_name();
+	script->script_class = p_class;
+	script->native = GDMonoUtils::get_class_native_base(script->script_class);
+
+	CRASH_COND(script->native == NULL);
+
+	GDMonoClass *base = script->script_class->get_parent_class();
+
+	if (base != script->native)
+		script->base = base;
+
+#ifdef DEBUG_ENABLED
+	// For debug builds, we must fetch from all native base methods as well.
+	// Native base methods must be fetched before the current class.
+	// Not needed if the script class itself is a native class.
+
+	if (script->script_class != script->native) {
+		GDMonoClass *native_top = script->native;
+		while (native_top) {
+			native_top->fetch_methods_with_godot_api_checks(script->native);
+
+			if (native_top == CACHED_CLASS(GodotObject))
+				break;
+
+			native_top = native_top->get_parent_class();
+		}
+	}
+#endif
+
+	script->script_class->fetch_methods_with_godot_api_checks(script->native);
+
+	// Need to fetch method from base classes as well
+	GDMonoClass *top = script->script_class;
+	while (top && top != script->native) {
+		top->fetch_methods_with_godot_api_checks(script->native);
+		top = top->get_parent_class();
+	}
+
+	return script;
+}
+
+bool CSharpScript::can_instance() const {
+
+	// TODO does the second condition even make sense?
+	return valid || (!tool && !ScriptServer::is_scripting_enabled());
+}
+
+StringName CSharpScript::get_instance_base_type() const {
+
+	if (native)
+		return native->get_name();
+	else
+		return StringName();
+}
+
+CSharpInstance *CSharpScript::_create_instance(const Variant **p_args, int p_argcount, Object *p_owner, bool p_isref, Variant::CallError &r_error) {
+
+	/* STEP 1, CREATE */
+
+	CSharpInstance *instance = memnew(CSharpInstance);
+	instance->base_ref = p_isref;
+	instance->script = Ref<CSharpScript>(this);
+	instance->owner = p_owner;
+	instance->owner->set_script_instance(instance);
+
+	if (instance->base_ref)
+		instance->_reference_owner_unsafe();
+
+	/* STEP 2, INITIALIZE AND CONSTRUCT */
+
+	MonoObject *mono_object = mono_object_new(SCRIPTS_DOMAIN, script_class->get_raw());
+
+	if (!mono_object) {
+		instance->script = Ref<CSharpScript>();
+		instance->owner->set_script_instance(NULL);
+		r_error.error = Variant::CallError::CALL_ERROR_INSTANCE_IS_NULL;
+		ERR_EXPLAIN("Failed to allocate memory for the object");
+		ERR_FAIL_V(NULL);
+	}
+
+#ifndef NO_THREADS
+	CSharpLanguage::singleton->lock->lock();
+#endif
+
+	instances.insert(instance->owner);
+
+#ifndef NO_THREADS
+	CSharpLanguage::singleton->lock->unlock();
+#endif
+
+	CACHED_FIELD(GodotObject, ptr)->set_value_raw(mono_object, instance->owner);
+
+	// Construct
+	GDMonoMethod *ctor = script_class->get_method(CACHED_STRING_NAME(dotctor), p_argcount);
+	ctor->invoke(mono_object, p_args, NULL);
+
+	// Tie managed to unmanaged
+	instance->gchandle = MonoGCHandle::create_strong(mono_object);
+
+	/* STEP 3, PARTY */
+
+	//@TODO make thread safe
+	return instance;
+}
+
+Variant CSharpScript::_new(const Variant **p_args, int p_argcount, Variant::CallError &r_error) {
+
+	if (!valid) {
+		r_error.error = Variant::CallError::CALL_ERROR_INVALID_METHOD;
+		return Variant();
+	}
+
+	r_error.error = Variant::CallError::CALL_OK;
+	REF ref;
+	Object *owner = NULL;
+
+	ERR_FAIL_NULL_V(native, Variant());
+
+	owner = ClassDB::instance(NATIVE_GDMONOCLASS_NAME(native));
+
+	Reference *r = Object::cast_to<Reference>(owner);
+	if (r) {
+		ref = REF(r);
+	}
+
+	CSharpInstance *instance = _create_instance(p_args, p_argcount, owner, r != NULL, r_error);
+	if (!instance) {
+		if (ref.is_null()) {
+			memdelete(owner); //no owner, sorry
+		}
+		return Variant();
+	}
+
+	if (ref.is_valid()) {
+		return ref;
+	} else {
+		return owner;
+	}
+}
+
+ScriptInstance *CSharpScript::instance_create(Object *p_this) {
+
+	if (!valid)
+		return NULL;
+
+	if (!tool && !ScriptServer::is_scripting_enabled()) {
+#ifdef TOOLS_ENABLED
+		PlaceHolderScriptInstance *si = memnew(PlaceHolderScriptInstance(CSharpLanguage::get_singleton(), Ref<Script>(this), p_this));
+		placeholders.insert(si);
+		_update_exports();
+		return si;
+#else
+		return NULL;
+#endif
+	}
+
+	if (native) {
+		String native_name = native->get_name();
+		if (!ClassDB::is_parent_class(p_this->get_class_name(), native_name)) {
+			if (ScriptDebugger::get_singleton()) {
+				CSharpLanguage::get_singleton()->debug_break_parse(get_path(), 0, "Script inherits from native type '" + native_name + "', so it can't be instanced in object of type: '" + p_this->get_class() + "'");
+			}
+			ERR_EXPLAIN("Script inherits from native type '" + native_name + "', so it can't be instanced in object of type: '" + p_this->get_class() + "'");
+			ERR_FAIL_V(NULL);
+		}
+	}
+
+	Variant::CallError unchecked_error;
+	return _create_instance(NULL, 0, p_this, Object::cast_to<Reference>(p_this), unchecked_error);
+}
+
+bool CSharpScript::instance_has(const Object *p_this) const {
+
+#ifndef NO_THREADS
+	CSharpLanguage::singleton->lock->lock();
+#endif
+
+	bool ret = instances.has((Object *)p_this);
+
+#ifndef NO_THREADS
+	CSharpLanguage::singleton->lock->unlock();
+#endif
+
+	return ret;
+}
+
+bool CSharpScript::has_source_code() const {
+
+	return !source.empty();
+}
+
+String CSharpScript::get_source_code() const {
+
+	return source;
+}
+
+void CSharpScript::set_source_code(const String &p_code) {
+
+	if (source == p_code)
+		return;
+	source = p_code;
+#ifdef TOOLS_ENABLED
+	source_changed_cache = true;
+#endif
+}
+
+bool CSharpScript::has_method(const StringName &p_method) const {
+
+	return script_class->has_method(p_method);
+}
+
+Error CSharpScript::reload(bool p_keep_state) {
+
+#ifndef NO_THREADS
+	CSharpLanguage::singleton->lock->lock();
+#endif
+
+	bool has_instances = instances.size();
+
+#ifndef NO_THREADS
+	CSharpLanguage::singleton->lock->unlock();
+#endif
+
+	ERR_FAIL_COND_V(!p_keep_state && has_instances, ERR_ALREADY_IN_USE);
+
+	GDMonoAssembly *project_assembly = GDMono::get_singleton()->get_project_assembly();
+
+	if (project_assembly) {
+		script_class = project_assembly->get_object_derived_class(name);
+		valid = script_class != NULL;
+
+		if (script_class) {
+			tool = script_class->has_attribute(CACHED_CLASS(ToolAttribute));
+
+			native = GDMonoUtils::get_class_native_base(script_class);
+
+			CRASH_COND(native == NULL);
+
+			GDMonoClass *base_class = script_class->get_parent_class();
+
+			if (base_class != native)
+				base = base_class;
+
+#ifdef DEBUG_ENABLED
+			// For debug builds, we must fetch from all native base methods as well.
+			// Native base methods must be fetched before the current class.
+			// Not needed if the script class itself is a native class.
+
+			if (script_class != native) {
+				GDMonoClass *native_top = native;
+				while (native_top) {
+					native_top->fetch_methods_with_godot_api_checks(native);
+
+					if (native_top == CACHED_CLASS(GodotObject))
+						break;
+
+					native_top = native_top->get_parent_class();
+				}
+			}
+#endif
+
+			script_class->fetch_methods_with_godot_api_checks(native);
+
+			// Need to fetch method from base classes as well
+			GDMonoClass *top = script_class;
+			while (top && top != native) {
+				top->fetch_methods_with_godot_api_checks(native);
+				top = top->get_parent_class();
+			}
+		}
+
+		return OK;
+	}
+
+	return ERR_FILE_MISSING_DEPENDENCIES;
+}
+
+String CSharpScript::get_node_type() const {
+
+	return ""; // ?
+}
+
+ScriptLanguage *CSharpScript::get_language() const {
+
+	return CSharpLanguage::get_singleton();
+}
+
+bool CSharpScript::get_property_default_value(const StringName &p_property, Variant &r_value) const {
+
+#ifdef TOOLS_ENABLED
+
+	const Map<StringName, Variant>::Element *E = exported_members_defval_cache.find(p_property);
+	if (E) {
+		r_value = E->get();
+		return true;
+	}
+
+	if (base_cache.is_valid()) {
+		return base_cache->get_property_default_value(p_property, r_value);
+	}
+
+#endif
+	return false;
+}
+
+void CSharpScript::update_exports() {
+
+#ifdef TOOLS_ENABLED
+	_update_exports();
+
+	if (placeholders.size()) {
+		Map<StringName, Variant> values;
+		List<PropertyInfo> propnames;
+		_update_exports_values(values, propnames);
+
+		for (Set<PlaceHolderScriptInstance *>::Element *E = placeholders.front(); E; E = E->next()) {
+			E->get()->update(propnames, values);
+		}
+	}
+#endif
+}
+
+Ref<Script> CSharpScript::get_base_script() const {
+
+	// TODO search in metadata file once we have it, not important any way?
+	return Ref<Script>();
+}
+
+void CSharpScript::get_script_property_list(List<PropertyInfo> *p_list) const {
+
+	for (Map<StringName, PropertyInfo>::Element *E = member_info.front(); E; E = E->next()) {
+		p_list->push_back(E->value());
+	}
+}
+
+int CSharpScript::get_member_line(const StringName &p_member) const {
+
+	// TODO omnisharp
+	return -1;
+}
+
+Error CSharpScript::load_source_code(const String &p_path) {
+
+	PoolVector<uint8_t> sourcef;
+	Error err;
+	FileAccess *f = FileAccess::open(p_path, FileAccess::READ, &err);
+	ERR_FAIL_COND_V(err != OK, err);
+
+	int len = f->get_len();
+	sourcef.resize(len + 1);
+	PoolVector<uint8_t>::Write w = sourcef.write();
+	int r = f->get_buffer(w.ptr(), len);
+	f->close();
+	memdelete(f);
+	ERR_FAIL_COND_V(r != len, ERR_CANT_OPEN);
+	w[len] = 0;
+
+	String s;
+	if (s.parse_utf8((const char *)w.ptr())) {
+
+		ERR_EXPLAIN("Script '" + p_path + "' contains invalid unicode (utf-8), so it was not loaded. Please ensure that scripts are saved in valid utf-8 unicode.");
+		ERR_FAIL_V(ERR_INVALID_DATA);
+	}
+
+	source = s;
+
+#ifdef TOOLS_ENABLED
+	source_changed_cache = true;
+#endif
+
+	return OK;
+}
+
+StringName CSharpScript::get_script_name() const {
+
+	return name;
+}
+
+CSharpScript::CSharpScript()
+	: script_list(this) {
+
+	_clear();
+
+#ifdef TOOLS_ENABLED
+	source_changed_cache = false;
+	exports_invalidated = true;
+#endif
+
+	_resource_path_changed();
+
+#ifdef DEBUG_ENABLED
+
+#ifndef NO_THREADS
+	CSharpLanguage::get_singleton()->lock->lock();
+#endif
+
+	CSharpLanguage::get_singleton()->script_list.add(&script_list);
+
+#ifndef NO_THREADS
+	CSharpLanguage::get_singleton()->lock->unlock();
+#endif
+
+#endif // DEBUG_ENABLED
+}
+
+CSharpScript::~CSharpScript() {
+
+#ifdef DEBUG_ENABLED
+
+#ifndef NO_THREADS
+	CSharpLanguage::get_singleton()->lock->lock();
+#endif
+
+	CSharpLanguage::get_singleton()->script_list.remove(&script_list);
+
+#ifndef NO_THREADS
+	CSharpLanguage::get_singleton()->lock->unlock();
+#endif
+
+#endif // DEBUG_ENABLED
+}
+
+/*************** RESOURCE ***************/
+
+RES ResourceFormatLoaderCSharpScript::load(const String &p_path, const String &p_original_path, Error *r_error) {
+
+	if (r_error)
+		*r_error = ERR_FILE_CANT_OPEN;
+
+	// TODO ignore anything inside bin/ and obj/ in tools builds?
+
+	CSharpScript *script = memnew(CSharpScript);
+
+	Ref<CSharpScript> scriptres(script);
+
+#if defined(DEBUG_ENABLED) || defined(TOOLS_ENABLED)
+	Error err = script->load_source_code(p_path);
+	ERR_FAIL_COND_V(err != OK, RES());
+#endif
+
+	script->set_path(p_original_path);
+	script->reload();
+
+	if (r_error)
+		*r_error = OK;
+
+	return scriptres;
+}
+
+void ResourceFormatLoaderCSharpScript::get_recognized_extensions(List<String> *p_extensions) const {
+
+	p_extensions->push_back("cs");
+}
+
+bool ResourceFormatLoaderCSharpScript::handles_type(const String &p_type) const {
+
+	return p_type == "Script" || p_type == CSharpLanguage::get_singleton()->get_type();
+}
+
+String ResourceFormatLoaderCSharpScript::get_resource_type(const String &p_path) const {
+
+	return p_path.get_extension().to_lower() == "cs" ? CSharpLanguage::get_singleton()->get_type() : "";
+}
+
+Error ResourceFormatSaverCSharpScript::save(const String &p_path, const RES &p_resource, uint32_t p_flags) {
+
+	Ref<CSharpScript> sqscr = p_resource;
+	ERR_FAIL_COND_V(sqscr.is_null(), ERR_INVALID_PARAMETER);
+
+	String source = sqscr->get_source_code();
+
+#ifdef TOOLS_ENABLED
+	if (!FileAccess::exists(p_path)) {
+		// The file does not yet exists, let's assume the user just created this script
+
+		String sln_path = GodotSharpDirs::get_project_sln_path();
+		String csproj_path = GodotSharpDirs::get_project_csproj_path();
+
+		if (!FileAccess::exists(sln_path) || !FileAccess::exists(csproj_path)) {
+			// A solution does not yet exist, create a new one
+
+			CRASH_COND(GodotSharpEditor::get_singleton() == NULL);
+			GodotSharpEditor::get_singleton()->call("_create_project_solution");
+		}
+
+		// Add the file to the C# project
+		if (FileAccess::exists(csproj_path)) {
+			CSharpProject::add_item(csproj_path, "Compile", ProjectSettings::get_singleton()->globalize_path(p_path));
+		} else {
+			ERR_PRINT("C# project not found!");
+		}
+	}
+#endif
+
+	Error err;
+	FileAccess *file = FileAccess::open(p_path, FileAccess::WRITE, &err);
+	ERR_FAIL_COND_V(err, err);
+
+	file->store_string(source);
+
+	if (file->get_error() != OK && file->get_error() != ERR_FILE_EOF) {
+		memdelete(file);
+		return ERR_CANT_CREATE;
+	}
+
+	file->close();
+	memdelete(file);
+
+	if (ScriptServer::is_reload_scripts_on_save_enabled()) {
+		CSharpLanguage::get_singleton()->reload_tool_script(p_resource, false);
+	}
+
+	return OK;
+}
+
+void ResourceFormatSaverCSharpScript::get_recognized_extensions(const RES &p_resource, List<String> *p_extensions) const {
+
+	if (Object::cast_to<CSharpScript>(p_resource.ptr())) {
+		p_extensions->push_back("cs");
+	}
+}
+
+bool ResourceFormatSaverCSharpScript::recognize(const RES &p_resource) const {
+
+	return Object::cast_to<CSharpScript>(p_resource.ptr()) != NULL;
+}
+
+CSharpLanguage::StringNameCache::StringNameCache() {
+
+	_awaited_signal_callback = StaticCString::create("_AwaitedSignalCallback");
+	_set = StaticCString::create("_set");
+	_get = StaticCString::create("_get");
+	_notification = StaticCString::create("_notification");
+	dotctor = StaticCString::create(".ctor");
+}
diff --git a/modules/mono/csharp_script.h b/modules/mono/csharp_script.h
new file mode 100644
index 00000000000..3fcc3bdf047
--- /dev/null
+++ b/modules/mono/csharp_script.h
@@ -0,0 +1,338 @@
+/*************************************************************************/
+/*  csharp_script.h                                                      */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2017 Godot Engine contributors (cf. AUTHORS.md)    */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+#ifndef CSHARP_SCRIPT_H
+#define CSHARP_SCRIPT_H
+
+#include "io/resource_loader.h"
+#include "io/resource_saver.h"
+#include "script_language.h"
+#include "self_list.h"
+
+#include "mono_gc_handle.h"
+#include "mono_gd/gd_mono.h"
+#include "mono_gd/gd_mono_header.h"
+#include "mono_gd/gd_mono_internals.h"
+
+class CSharpScript;
+class CSharpInstance;
+class CSharpLanguage;
+
+#ifdef NO_SAFE_CAST
+template <typename TScriptInstance, typename TScriptLanguage>
+TScriptInstance *cast_script_instance(ScriptInstance *p_inst) {
+	return p_inst->get_language() == TScriptLanguage::get_singleton() ? static_cast<TScriptInstance *>(p_inst) : NULL;
+}
+#else
+template <typename TScriptInstance, typename TScriptLanguage>
+TScriptInstance *cast_script_instance(ScriptInstance *p_inst) {
+	return dynamic_cast<TScriptInstance *>(p_inst);
+}
+#endif
+
+#define CAST_CSHARP_INSTANCE(m_inst) (cast_script_instance<CSharpInstance, CSharpLanguage>(m_inst))
+
+class CSharpScript : public Script {
+
+	GDCLASS(CSharpScript, Script)
+
+	friend class CSharpInstance;
+	friend class CSharpLanguage;
+	friend class CSharpScriptDepSort;
+
+	bool tool;
+	bool valid;
+
+	bool builtin;
+
+	GDMonoClass *base;
+	GDMonoClass *native;
+	GDMonoClass *script_class;
+
+	Ref<CSharpScript> base_cache; // TODO what's this for?
+
+	Set<Object *> instances;
+
+	String source;
+	StringName name;
+
+	SelfList<CSharpScript> script_list;
+
+#ifdef TOOLS_ENABLED
+	List<PropertyInfo> exported_members_cache; // members_cache
+	Map<StringName, Variant> exported_members_defval_cache; // member_default_values_cache
+	Set<PlaceHolderScriptInstance *> placeholders;
+	bool source_changed_cache;
+	bool exports_invalidated;
+
+	void _update_exports_values(Map<StringName, Variant> &values, List<PropertyInfo> &propnames);
+	virtual void _placeholder_erased(PlaceHolderScriptInstance *p_placeholder);
+#endif
+
+#ifdef DEBUG_ENABLED
+	Map<ObjectID, List<Pair<StringName, Variant> > > pending_reload_state;
+#endif
+
+	Map<StringName, PropertyInfo> member_info;
+
+	void _clear();
+
+	bool _update_exports();
+	CSharpInstance *_create_instance(const Variant **p_args, int p_argcount, Object *p_owner, bool p_isref, Variant::CallError &r_error);
+	Variant _new(const Variant **p_args, int p_argcount, Variant::CallError &r_error);
+
+	// Do not use unless you know what you are doing
+	friend void GDMonoInternals::tie_managed_to_unmanaged(MonoObject *, Object *);
+	static Ref<CSharpScript> create_for_managed_type(GDMonoClass *p_class);
+
+protected:
+	static void _bind_methods();
+
+	Variant call(const StringName &p_method, const Variant **p_args, int p_argcount, Variant::CallError &r_error);
+	virtual void _resource_path_changed();
+
+public:
+	virtual bool can_instance() const;
+	virtual StringName get_instance_base_type() const;
+	virtual ScriptInstance *instance_create(Object *p_this);
+	virtual bool instance_has(const Object *p_this) const;
+
+	virtual bool has_source_code() const;
+	virtual String get_source_code() const;
+	virtual void set_source_code(const String &p_code);
+
+	virtual Error reload(bool p_keep_state = false);
+
+	/* TODO */ virtual bool has_script_signal(const StringName &p_signal) const { return false; }
+	/* TODO */ virtual void get_script_signal_list(List<MethodInfo> *r_signals) const {}
+
+	/* TODO */ virtual bool get_property_default_value(const StringName &p_property, Variant &r_value) const;
+	virtual void get_script_property_list(List<PropertyInfo> *p_list) const;
+	virtual void update_exports();
+
+	virtual bool is_tool() const { return tool; }
+	virtual Ref<Script> get_base_script() const;
+	virtual String get_node_type() const;
+	virtual ScriptLanguage *get_language() const;
+
+	/* TODO */ virtual void get_script_method_list(List<MethodInfo> *p_list) const {}
+	bool has_method(const StringName &p_method) const;
+	/* TODO */ MethodInfo get_method_info(const StringName &p_method) const { return MethodInfo(); }
+
+	virtual int get_member_line(const StringName &p_member) const;
+
+	Error load_source_code(const String &p_path);
+
+	StringName get_script_name() const;
+
+	CSharpScript();
+	~CSharpScript();
+};
+
+class CSharpInstance : public ScriptInstance {
+
+	friend class CSharpScript;
+	friend class CSharpLanguage;
+	Object *owner;
+	Ref<CSharpScript> script;
+	Ref<MonoGCHandle> gchandle;
+	bool base_ref;
+	bool ref_dying;
+
+	void _ml_call_reversed(GDMonoClass *klass, const StringName &p_method, const Variant **p_args, int p_argcount);
+
+	void _reference_owner_unsafe();
+	void _unreference_owner_unsafe();
+
+	// Do not use unless you know what you are doing
+	friend void GDMonoInternals::tie_managed_to_unmanaged(MonoObject *, Object *);
+	static CSharpInstance *create_for_managed_type(Object *p_owner, CSharpScript *p_script, const Ref<MonoGCHandle> &p_gchandle);
+
+public:
+	MonoObject *get_mono_object() const;
+
+	virtual bool set(const StringName &p_name, const Variant &p_value);
+	virtual bool get(const StringName &p_name, Variant &r_ret) const;
+	virtual void get_property_list(List<PropertyInfo> *p_properties) const;
+	virtual Variant::Type get_property_type(const StringName &p_name, bool *r_is_valid) const;
+
+	/* TODO */ virtual void get_method_list(List<MethodInfo> *p_list) const {}
+	virtual bool has_method(const StringName &p_method) const;
+	virtual Variant call(const StringName &p_method, const Variant **p_args, int p_argcount, Variant::CallError &r_error);
+	virtual void call_multilevel(const StringName &p_method, const Variant **p_args, int p_argcount);
+	virtual void call_multilevel_reversed(const StringName &p_method, const Variant **p_args, int p_argcount);
+
+	void mono_object_disposed();
+
+	void refcount_incremented();
+	bool refcount_decremented();
+
+	RPCMode get_rpc_mode(const StringName &p_method) const;
+	RPCMode get_rset_mode(const StringName &p_variable) const;
+
+	virtual void notification(int p_notification);
+
+	virtual Ref<Script> get_script() const;
+
+	virtual ScriptLanguage *get_language();
+
+	CSharpInstance();
+	~CSharpInstance();
+};
+
+class CSharpLanguage : public ScriptLanguage {
+
+	friend class CSharpScript;
+	friend class CSharpInstance;
+
+	static CSharpLanguage *singleton;
+
+	GDMono *gdmono;
+	SelfList<CSharpScript>::List script_list;
+
+	Mutex *lock;
+	Mutex *script_bind_lock;
+
+	Map<Ref<CSharpScript>, Map<ObjectID, List<Pair<StringName, Variant> > > > to_reload;
+
+	Map<Object *, Ref<MonoGCHandle> > gchandle_bindings;
+
+	struct StringNameCache {
+
+		StringName _awaited_signal_callback;
+		StringName _set;
+		StringName _get;
+		StringName _notification;
+		StringName dotctor; // .ctor
+
+		StringNameCache();
+	};
+
+	StringNameCache string_names;
+
+	int lang_idx;
+
+public:
+	_FORCE_INLINE_ int get_language_index() { return lang_idx; }
+	void set_language_index(int p_idx);
+
+	_FORCE_INLINE_ static CSharpLanguage *get_singleton() { return singleton; }
+
+	bool debug_break(const String &p_error, bool p_allow_continue = true);
+	bool debug_break_parse(const String &p_file, int p_line, const String &p_error);
+
+#ifdef TOOLS_ENABLED
+	void reload_assemblies_if_needed(bool p_soft_reload);
+#endif
+
+	virtual String get_name() const;
+
+	/* LANGUAGE FUNCTIONS */
+	virtual String get_type() const;
+	virtual String get_extension() const;
+	virtual Error execute_file(const String &p_path);
+	virtual void init();
+	virtual void finish();
+
+	/* EDITOR FUNCTIONS */
+	virtual void get_reserved_words(List<String> *p_words) const;
+	virtual void get_comment_delimiters(List<String> *p_delimiters) const;
+	virtual void get_string_delimiters(List<String> *p_delimiters) const;
+	virtual Ref<Script> get_template(const String &p_class_name, const String &p_base_class_name) const;
+	/* TODO */ virtual bool validate(const String &p_script, int &r_line_error, int &r_col_error, String &r_test_error, const String &p_path, List<String> *r_functions) const { return true; }
+	virtual Script *create_script() const;
+	virtual bool has_named_classes() const;
+	/* TODO? */ virtual int find_function(const String &p_function, const String &p_code) const { return -1; }
+	virtual String make_function(const String &p_class, const String &p_name, const PoolStringArray &p_args) const;
+	/* TODO? */ Error complete_code(const String &p_code, const String &p_base_path, Object *p_owner, List<String> *r_options, String &r_call_hint) { return ERR_UNAVAILABLE; }
+	/* TODO? */ virtual void auto_indent_code(String &p_code, int p_from_line, int p_to_line) const {}
+	/* TODO */ virtual void add_global_constant(const StringName &p_variable, const Variant &p_value) {}
+
+	/* DEBUGGER FUNCTIONS */
+	/* TODO */ virtual String debug_get_error() const { return ""; }
+	/* TODO */ virtual int debug_get_stack_level_count() const { return 1; }
+	/* TODO */ virtual int debug_get_stack_level_line(int p_level) const { return 1; }
+	/* TODO */ virtual String debug_get_stack_level_function(int p_level) const { return ""; }
+	/* TODO */ virtual String debug_get_stack_level_source(int p_level) const { return ""; }
+	/* TODO */ virtual void debug_get_stack_level_locals(int p_level, List<String> *p_locals, List<Variant> *p_values, int p_max_subitems, int p_max_depth) {}
+	/* TODO */ virtual void debug_get_stack_level_members(int p_level, List<String> *p_members, List<Variant> *p_values, int p_max_subitems, int p_max_depth) {}
+	/* TODO */ virtual void debug_get_globals(List<String> *p_locals, List<Variant> *p_values, int p_max_subitems, int p_max_depth) {}
+	/* TODO */ virtual String debug_parse_stack_level_expression(int p_level, const String &p_expression, int p_max_subitems, int p_max_depth) { return ""; }
+	/* TODO */ virtual Vector<StackInfo> debug_get_current_stack_info() { return Vector<StackInfo>(); }
+
+	/* PROFILING FUNCTIONS */
+	/* TODO */ virtual void profiling_start() {}
+	/* TODO */ virtual void profiling_stop() {}
+	/* TODO */ virtual int profiling_get_accumulated_data(ProfilingInfo *p_info_arr, int p_info_max) { return 0; }
+	/* TODO */ virtual int profiling_get_frame_data(ProfilingInfo *p_info_arr, int p_info_max) { return 0; }
+
+	virtual void frame();
+
+	/* TODO? */ virtual void get_public_functions(List<MethodInfo> *p_functions) const {}
+	/* TODO? */ virtual void get_public_constants(List<Pair<String, Variant> > *p_constants) const {}
+
+	virtual void reload_all_scripts();
+	virtual void reload_tool_script(const Ref<Script> &p_script, bool p_soft_reload);
+
+	/* LOADER FUNCTIONS */
+	virtual void get_recognized_extensions(List<String> *p_extensions) const;
+
+#ifdef TOOLS_ENABLED
+	virtual Error open_in_external_editor(const Ref<Script> &p_script, int p_line, int p_col);
+	virtual bool overrides_external_editor();
+#endif
+
+	/* THREAD ATTACHING */
+	virtual void thread_enter();
+	virtual void thread_exit();
+
+	// Don't use these. I'm watching you
+	virtual void *alloc_instance_binding_data(Object *p_object);
+	virtual void free_instance_binding_data(void *p_data);
+
+	CSharpLanguage();
+	~CSharpLanguage();
+};
+
+class ResourceFormatLoaderCSharpScript : public ResourceFormatLoader {
+public:
+	virtual RES load(const String &p_path, const String &p_original_path = "", Error *r_error = NULL);
+	virtual void get_recognized_extensions(List<String> *p_extensions) const;
+	virtual bool handles_type(const String &p_type) const;
+	virtual String get_resource_type(const String &p_path) const;
+};
+
+class ResourceFormatSaverCSharpScript : public ResourceFormatSaver {
+public:
+	virtual Error save(const String &p_path, const RES &p_resource, uint32_t p_flags = 0);
+	virtual void get_recognized_extensions(const RES &p_resource, List<String> *p_extensions) const;
+	virtual bool recognize(const RES &p_resource) const;
+};
+
+#endif // CSHARP_SCRIPT_H
diff --git a/modules/mono/doc_classes/@C#.xml b/modules/mono/doc_classes/@C#.xml
new file mode 100644
index 00000000000..487ba9835fc
--- /dev/null
+++ b/modules/mono/doc_classes/@C#.xml
@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<class name="@C#" category="Core" version="3.0.alpha.custom_build">
+	<brief_description>
+	</brief_description>
+	<description>
+	</description>
+	<tutorials>
+	</tutorials>
+	<demos>
+	</demos>
+	<methods>
+	</methods>
+	<constants>
+	</constants>
+</class>
diff --git a/modules/mono/doc_classes/CSharpScript.xml b/modules/mono/doc_classes/CSharpScript.xml
new file mode 100644
index 00000000000..5f21c9774dd
--- /dev/null
+++ b/modules/mono/doc_classes/CSharpScript.xml
@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<class name="CSharpScript" inherits="Script" category="Core" version="3.0.alpha.custom_build">
+	<brief_description>
+	</brief_description>
+	<description>
+	</description>
+	<tutorials>
+	</tutorials>
+	<demos>
+	</demos>
+	<methods>
+		<method name="new" qualifiers="vararg">
+			<return type="Object">
+			</return>
+			<description>
+			</description>
+		</method>
+	</methods>
+	<constants>
+	</constants>
+</class>
diff --git a/modules/mono/doc_classes/GodotSharp.xml b/modules/mono/doc_classes/GodotSharp.xml
new file mode 100644
index 00000000000..e7e06ddd8f5
--- /dev/null
+++ b/modules/mono/doc_classes/GodotSharp.xml
@@ -0,0 +1,43 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<class name="GodotSharp" inherits="Object" category="Core" version="3.0.alpha.custom_build">
+	<brief_description>
+	</brief_description>
+	<description>
+	</description>
+	<tutorials>
+	</tutorials>
+	<demos>
+	</demos>
+	<methods>
+		<method name="attach_thread">
+			<return type="void">
+			</return>
+			<description>
+				Attaches the current thread to the mono runtime.
+			</description>
+		</method>
+		<method name="detach_thread">
+			<return type="void">
+			</return>
+			<description>
+				Detaches the current thread from the mono runtime.
+			</description>
+		</method>
+		<method name="is_domain_loaded">
+			<return type="bool">
+			</return>
+			<description>
+				Returns whether the scripts domain is loaded.
+			</description>
+		</method>
+		<method name="is_finalizing_domain">
+			<return type="bool">
+			</return>
+			<description>
+				Returns whether the scripts domain is being finalized.
+			</description>
+		</method>
+	</methods>
+	<constants>
+	</constants>
+</class>
diff --git a/modules/mono/editor/GodotSharpTools/Build/BuildSystem.cs b/modules/mono/editor/GodotSharpTools/Build/BuildSystem.cs
new file mode 100644
index 00000000000..256e64dddef
--- /dev/null
+++ b/modules/mono/editor/GodotSharpTools/Build/BuildSystem.cs
@@ -0,0 +1,335 @@
+using System;
+using System.Collections.Generic;
+using System.Collections.Specialized;
+using System.Diagnostics;
+using System.IO;
+using System.Runtime.CompilerServices;
+using System.Security;
+using Microsoft.Build.Framework;
+
+namespace GodotSharpTools.Build
+{
+    public class BuildInstance : IDisposable
+    {
+        [MethodImpl(MethodImplOptions.InternalCall)]
+        internal extern static void godot_icall_BuildInstance_ExitCallback(string solution, string config, int exitCode);
+
+        [MethodImpl(MethodImplOptions.InternalCall)]
+        internal extern static string godot_icall_BuildInstance_get_MSBuildPath();
+
+        private static string MSBuildPath
+        {
+            get { return godot_icall_BuildInstance_get_MSBuildPath(); }
+        }
+
+        private string solution;
+        private string config;
+
+        private Process process;
+
+        private int exitCode;
+        public int ExitCode { get { return exitCode; } }
+
+        public bool IsRunning { get { return process != null && !process.HasExited; } }
+
+        public BuildInstance(string solution, string config)
+        {
+            this.solution = solution;
+            this.config = config;
+        }
+
+        public bool Build(string loggerAssemblyPath, string loggerOutputDir, string[] customProperties = null)
+        {
+            string compilerArgs = BuildArguments(loggerAssemblyPath, loggerOutputDir, customProperties);
+
+            ProcessStartInfo startInfo = new ProcessStartInfo(MSBuildPath, compilerArgs);
+
+            // No console output, thanks
+            startInfo.RedirectStandardOutput = true;
+            startInfo.RedirectStandardError = true;
+            startInfo.UseShellExecute = false;
+
+            // Needed when running from Developer Command Prompt for VS
+            RemovePlatformVariable(startInfo.EnvironmentVariables);
+
+            using (Process process = new Process())
+            {
+                process.StartInfo = startInfo;
+
+                process.Start();
+
+                process.BeginOutputReadLine();
+                process.BeginErrorReadLine();
+
+                process.WaitForExit();
+
+                exitCode = process.ExitCode;
+            }
+
+            return true;
+        }
+
+        public bool BuildAsync(string loggerAssemblyPath, string loggerOutputDir, string[] customProperties = null)
+        {
+            if (process != null)
+                throw new InvalidOperationException("Already in use");
+
+            string compilerArgs = BuildArguments(loggerAssemblyPath, loggerOutputDir, customProperties);
+
+            ProcessStartInfo startInfo = new ProcessStartInfo("msbuild", compilerArgs);
+
+            // No console output, thanks
+            startInfo.RedirectStandardOutput = true;
+            startInfo.RedirectStandardError = true;
+            startInfo.UseShellExecute = false;
+
+            // Needed when running from Developer Command Prompt for VS
+            RemovePlatformVariable(startInfo.EnvironmentVariables);
+
+            process = new Process();
+            process.StartInfo = startInfo;
+            process.EnableRaisingEvents = true;
+            process.Exited += new EventHandler(BuildProcess_Exited);
+
+            process.Start();
+
+            return true;
+        }
+
+        private string BuildArguments(string loggerAssemblyPath, string loggerOutputDir, string[] customProperties)
+        {
+            string arguments = string.Format("{0} /v:normal /t:Build /p:{1} /l:{2},{3};{4}",
+                solution,
+                "Configuration=" + config,
+                typeof(GodotBuildLogger).FullName,
+                loggerAssemblyPath,
+                loggerOutputDir
+            );
+
+            if (customProperties != null)
+            {
+                foreach (string customProperty in customProperties)
+                {
+                    arguments += " /p:" + customProperty;
+                }
+            }
+
+            return arguments;
+        }
+
+        private void RemovePlatformVariable(StringDictionary environmentVariables)
+        {
+            // EnvironmentVariables is case sensitive? Seriously?
+
+            List<string> platformEnvironmentVariables = new List<string>();
+
+            foreach (string env in environmentVariables.Keys)
+            {
+                if (env.ToUpper() == "PLATFORM")
+                    platformEnvironmentVariables.Add(env);
+            }
+
+            foreach (string env in platformEnvironmentVariables)
+                environmentVariables.Remove(env);
+        }
+
+        private void BuildProcess_Exited(object sender, System.EventArgs e)
+        {
+            exitCode = process.ExitCode;
+
+            godot_icall_BuildInstance_ExitCallback(solution, config, exitCode);
+
+            Dispose();
+        }
+
+        public void Dispose()
+        {
+            if (process != null)
+            {
+                process.Dispose();
+                process = null;
+            }
+        }
+    }
+
+    public class GodotBuildLogger : ILogger
+    {
+        public string Parameters { get; set; }
+        public LoggerVerbosity Verbosity { get; set; }
+
+        public void Initialize(IEventSource eventSource)
+        {
+            if (null == Parameters)
+                throw new LoggerException("Log directory was not set.");
+
+            string[] parameters = Parameters.Split(';');
+
+            string logDir = parameters[0];
+
+            if (String.IsNullOrEmpty(logDir))
+                throw new LoggerException("Log directory was not set.");
+
+            if (parameters.Length > 1)
+                throw new LoggerException("Too many parameters passed.");
+
+            string logFile = Path.Combine(logDir, "msbuild_log.txt");
+            string issuesFile = Path.Combine(logDir, "msbuild_issues.csv");
+
+            try
+            {
+                if (!Directory.Exists(logDir))
+                    Directory.CreateDirectory(logDir);
+
+                this.logStreamWriter = new StreamWriter(logFile);
+                this.issuesStreamWriter = new StreamWriter(issuesFile);
+            }
+            catch (Exception ex)
+            {
+                if
+                (
+                    ex is UnauthorizedAccessException
+                    || ex is ArgumentNullException
+                    || ex is PathTooLongException
+                    || ex is DirectoryNotFoundException
+                    || ex is NotSupportedException
+                    || ex is ArgumentException
+                    || ex is SecurityException
+                    || ex is IOException
+                )
+                {
+                    throw new LoggerException("Failed to create log file: " + ex.Message);
+                }
+                else
+                {
+                    // Unexpected failure
+                    throw;
+                }
+            }
+
+            eventSource.ProjectStarted += new ProjectStartedEventHandler(eventSource_ProjectStarted);
+            eventSource.TaskStarted += new TaskStartedEventHandler(eventSource_TaskStarted);
+            eventSource.MessageRaised += new BuildMessageEventHandler(eventSource_MessageRaised);
+            eventSource.WarningRaised += new BuildWarningEventHandler(eventSource_WarningRaised);
+            eventSource.ErrorRaised += new BuildErrorEventHandler(eventSource_ErrorRaised);
+            eventSource.ProjectFinished += new ProjectFinishedEventHandler(eventSource_ProjectFinished);
+        }
+
+        void eventSource_ErrorRaised(object sender, BuildErrorEventArgs e)
+        {
+            string line = String.Format("{0}({1},{2}): error {3}: {4}", e.File, e.LineNumber, e.ColumnNumber, e.Code, e.Message);
+
+            if (e.ProjectFile.Length > 0)
+                line += string.Format(" [{0}]", e.ProjectFile);
+
+            WriteLine(line);
+
+            string errorLine = String.Format(@"error,{0},{1},{2},{3},{4},{5}",
+                                    e.File.CsvEscape(), e.LineNumber, e.ColumnNumber,
+                                    e.Code.CsvEscape(), e.Message.CsvEscape(), e.ProjectFile.CsvEscape());
+            issuesStreamWriter.WriteLine(errorLine);
+        }
+
+        void eventSource_WarningRaised(object sender, BuildWarningEventArgs e)
+        {
+            string line = String.Format("{0}({1},{2}): warning {3}: {4}", e.File, e.LineNumber, e.ColumnNumber, e.Code, e.Message, e.ProjectFile);
+
+            if (e.ProjectFile != null && e.ProjectFile.Length > 0)
+                line += string.Format(" [{0}]", e.ProjectFile);
+
+            WriteLine(line);
+
+            string warningLine = String.Format(@"warning,{0},{1},{2},{3},{4},{5}",
+                                    e.File.CsvEscape(), e.LineNumber, e.ColumnNumber,
+                                    e.Code.CsvEscape(), e.Message.CsvEscape(), e.ProjectFile != null ? e.ProjectFile.CsvEscape() : string.Empty);
+            issuesStreamWriter.WriteLine(warningLine);
+        }
+
+        void eventSource_MessageRaised(object sender, BuildMessageEventArgs e)
+        {
+            // BuildMessageEventArgs adds Importance to BuildEventArgs
+            // Let's take account of the verbosity setting we've been passed in deciding whether to log the message
+            if ((e.Importance == MessageImportance.High && IsVerbosityAtLeast(LoggerVerbosity.Minimal))
+                || (e.Importance == MessageImportance.Normal && IsVerbosityAtLeast(LoggerVerbosity.Normal))
+                || (e.Importance == MessageImportance.Low && IsVerbosityAtLeast(LoggerVerbosity.Detailed))
+                )
+            {
+                WriteLineWithSenderAndMessage(String.Empty, e);
+            }
+        }
+
+        void eventSource_TaskStarted(object sender, TaskStartedEventArgs e)
+        {
+            // TaskStartedEventArgs adds ProjectFile, TaskFile, TaskName
+            // To keep this log clean, this logger will ignore these events.
+        }
+
+        void eventSource_ProjectStarted(object sender, ProjectStartedEventArgs e)
+        {
+            WriteLine(e.Message);
+            indent++;
+        }
+
+        void eventSource_ProjectFinished(object sender, ProjectFinishedEventArgs e)
+        {
+            indent--;
+            WriteLine(e.Message);
+        }
+
+        /// <summary>
+        /// Write a line to the log, adding the SenderName
+        /// </summary>
+        private void WriteLineWithSender(string line, BuildEventArgs e)
+        {
+            if (0 == String.Compare(e.SenderName, "MSBuild", true /*ignore case*/))
+            {
+                // Well, if the sender name is MSBuild, let's leave it out for prettiness
+                WriteLine(line);
+            }
+            else
+            {
+                WriteLine(e.SenderName + ": " + line);
+            }
+        }
+
+        /// <summary>
+        /// Write a line to the log, adding the SenderName and Message
+        /// (these parameters are on all MSBuild event argument objects)
+        /// </summary>
+        private void WriteLineWithSenderAndMessage(string line, BuildEventArgs e)
+        {
+            if (0 == String.Compare(e.SenderName, "MSBuild", true /*ignore case*/))
+            {
+                // Well, if the sender name is MSBuild, let's leave it out for prettiness
+                WriteLine(line + e.Message);
+            }
+            else
+            {
+                WriteLine(e.SenderName + ": " + line + e.Message);
+            }
+        }
+
+        private void WriteLine(string line)
+        {
+            for (int i = indent; i > 0; i--)
+            {
+                logStreamWriter.Write("\t");
+            }
+            logStreamWriter.WriteLine(line);
+        }
+
+        public void Shutdown()
+        {
+            logStreamWriter.Close();
+            issuesStreamWriter.Close();
+        }
+
+        public bool IsVerbosityAtLeast(LoggerVerbosity checkVerbosity)
+        {
+            return this.Verbosity >= checkVerbosity;
+        }
+
+        private StreamWriter logStreamWriter;
+        private StreamWriter issuesStreamWriter;
+        private int indent;
+    }
+}
diff --git a/modules/mono/editor/GodotSharpTools/Editor/MonoDevelopInstance.cs b/modules/mono/editor/GodotSharpTools/Editor/MonoDevelopInstance.cs
new file mode 100644
index 00000000000..303be3b732b
--- /dev/null
+++ b/modules/mono/editor/GodotSharpTools/Editor/MonoDevelopInstance.cs
@@ -0,0 +1,58 @@
+using System;
+using System.IO;
+using System.Collections.Generic;
+using System.Diagnostics;
+
+namespace GodotSharpTools.Editor
+{
+    public class MonoDevelopInstance
+    {
+        private Process process;
+        private string solutionFile;
+
+        public void Execute(string[] files)
+        {
+            bool newWindow = process == null || process.HasExited;
+
+            List<string> args = new List<string>();
+
+            args.Add("--ipc-tcp");
+
+            if (newWindow)
+                args.Add("\"" + Path.GetFullPath(solutionFile) + "\"");
+
+            foreach (var file in files)
+            {
+                int semicolonIndex = file.IndexOf(';');
+
+                string filePath = semicolonIndex < 0 ? file : file.Substring(0, semicolonIndex);
+                string cursor = semicolonIndex < 0 ? string.Empty : file.Substring(semicolonIndex);
+
+                args.Add("\"" + Path.GetFullPath(filePath.NormalizePath()) + cursor + "\"");
+            }
+
+            if (newWindow)
+            {
+                ProcessStartInfo startInfo = new ProcessStartInfo(MonoDevelopFile, string.Join(" ", args));
+                process = Process.Start(startInfo);
+            }
+            else
+            {
+                Process.Start(MonoDevelopFile, string.Join(" ", args));
+            }
+        }
+
+        public MonoDevelopInstance(string solutionFile)
+        {
+            this.solutionFile = solutionFile;
+        }
+
+        private static string MonoDevelopFile
+        {
+            get
+            {
+                return "monodevelop";
+            }
+        }
+    }
+}
diff --git a/modules/mono/editor/GodotSharpTools/GodotSharpTools.csproj b/modules/mono/editor/GodotSharpTools/GodotSharpTools.csproj
new file mode 100644
index 00000000000..981083a3c20
--- /dev/null
+++ b/modules/mono/editor/GodotSharpTools/GodotSharpTools.csproj
@@ -0,0 +1,45 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project DefaultTargets="Build" ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup>
+    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
+    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
+    <ProjectGuid>{A8CDAD94-C6D4-4B19-A7E7-76C53CC92984}</ProjectGuid>
+    <OutputType>Library</OutputType>
+    <RootNamespace>GodotSharpTools</RootNamespace>
+    <AssemblyName>GodotSharpTools</AssemblyName>
+    <TargetFrameworkVersion>v4.5</TargetFrameworkVersion>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
+    <DebugSymbols>true</DebugSymbols>
+    <DebugType>full</DebugType>
+    <Optimize>false</Optimize>
+    <OutputPath>bin\Debug</OutputPath>
+    <DefineConstants>DEBUG;</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+    <ConsolePause>false</ConsolePause>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
+    <DebugType>full</DebugType>
+    <Optimize>true</Optimize>
+    <OutputPath>bin\Release</OutputPath>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+    <ConsolePause>false</ConsolePause>
+  </PropertyGroup>
+  <ItemGroup>
+    <Reference Include="System" />
+    <Reference Include="Microsoft.Build" />
+    <Reference Include="Microsoft.Build.Framework" />
+  </ItemGroup>
+  <ItemGroup>
+    <Compile Include="StringExtensions.cs" />
+    <Compile Include="Build\BuildSystem.cs" />
+    <Compile Include="Editor\MonoDevelopInstance.cs" />
+    <Compile Include="Project\ProjectExtensions.cs" />
+    <Compile Include="Project\ProjectGenerator.cs" />
+    <Compile Include="Project\ProjectUtils.cs" />
+    <Compile Include="Properties\AssemblyInfo.cs" />
+  </ItemGroup>
+  <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
+</Project>
\ No newline at end of file
diff --git a/modules/mono/editor/GodotSharpTools/GodotSharpTools.sln b/modules/mono/editor/GodotSharpTools/GodotSharpTools.sln
new file mode 100644
index 00000000000..7eabcdff5db
--- /dev/null
+++ b/modules/mono/editor/GodotSharpTools/GodotSharpTools.sln
@@ -0,0 +1,17 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio 2012
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "GodotSharpTools", "GodotSharpTools.csproj", "{A8CDAD94-C6D4-4B19-A7E7-76C53CC92984}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{A8CDAD94-C6D4-4B19-A7E7-76C53CC92984}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{A8CDAD94-C6D4-4B19-A7E7-76C53CC92984}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{A8CDAD94-C6D4-4B19-A7E7-76C53CC92984}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{A8CDAD94-C6D4-4B19-A7E7-76C53CC92984}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+EndGlobal
diff --git a/modules/mono/editor/GodotSharpTools/GodotSharpTools.userprefs b/modules/mono/editor/GodotSharpTools/GodotSharpTools.userprefs
new file mode 100644
index 00000000000..0cbafdc20d9
--- /dev/null
+++ b/modules/mono/editor/GodotSharpTools/GodotSharpTools.userprefs
@@ -0,0 +1,14 @@
+<Properties StartupItem="GodotSharpTools.csproj">
+  <MonoDevelop.Ide.Workspace ActiveConfiguration="Debug" />
+  <MonoDevelop.Ide.Workbench ActiveDocument="Build/BuildSystem.cs">
+    <Files>
+      <File FileName="Build/ProjectExtensions.cs" Line="1" Column="1" />
+      <File FileName="Build/ProjectGenerator.cs" Line="1" Column="1" />
+      <File FileName="Build/BuildSystem.cs" Line="37" Column="14" />
+    </Files>
+  </MonoDevelop.Ide.Workbench>
+  <MonoDevelop.Ide.DebuggingService.Breakpoints>
+    <BreakpointStore />
+  </MonoDevelop.Ide.DebuggingService.Breakpoints>
+  <MonoDevelop.Ide.DebuggingService.PinnedWatches />
+</Properties>
\ No newline at end of file
diff --git a/modules/mono/editor/GodotSharpTools/Project/ProjectExtensions.cs b/modules/mono/editor/GodotSharpTools/Project/ProjectExtensions.cs
new file mode 100644
index 00000000000..6a977315397
--- /dev/null
+++ b/modules/mono/editor/GodotSharpTools/Project/ProjectExtensions.cs
@@ -0,0 +1,49 @@
+using System;
+using Microsoft.Build.Construction;
+
+namespace GodotSharpTools.Project
+{
+    public static class ProjectExtensions
+    {
+        public static bool HasItem(this ProjectRootElement root, string itemType, string include)
+        {
+            string includeNormalized = include.NormalizePath();
+
+            foreach (var itemGroup in root.ItemGroups)
+            {
+                if (itemGroup.Condition.Length != 0)
+                    continue;
+
+                foreach (var item in itemGroup.Items)
+                {
+                    if (item.ItemType == itemType)
+                    {
+                        if (item.Include.NormalizePath() == includeNormalized)
+                            return true;
+                    }
+                }
+            }
+
+            return false;
+        }
+
+        public static void AddItemChecked(this ProjectRootElement root, string itemType, string include)
+        {
+            if (!root.HasItem(itemType, include))
+            {
+                root.AddItem(itemType, include);
+            }
+        }
+
+        public static Guid GetGuid(this ProjectRootElement root)
+        {
+            foreach (var property in root.Properties)
+            {
+                if (property.Name == "ProjectGuid")
+                    return Guid.Parse(property.Value);
+            }
+
+            return Guid.Empty;
+        }
+    }
+}
diff --git a/modules/mono/editor/GodotSharpTools/Project/ProjectGenerator.cs b/modules/mono/editor/GodotSharpTools/Project/ProjectGenerator.cs
new file mode 100644
index 00000000000..6bf54a01562
--- /dev/null
+++ b/modules/mono/editor/GodotSharpTools/Project/ProjectGenerator.cs
@@ -0,0 +1,216 @@
+using System;
+using System.IO;
+using Microsoft.Build.Construction;
+
+namespace GodotSharpTools.Project
+{
+    public static class ProjectGenerator
+    {
+        public static string GenCoreApiProject(string dir, string[] compileItems)
+        {
+            string path = Path.Combine(dir, CoreApiProject + ".csproj");
+
+            ProjectPropertyGroupElement mainGroup;
+            var root = CreateLibraryProject(CoreApiProject, out mainGroup);
+
+            mainGroup.AddProperty("DocumentationFile", Path.Combine("$(OutputPath)", "$(AssemblyName).xml"));
+            mainGroup.SetProperty("RootNamespace", "Godot");
+
+            GenAssemblyInfoFile(root, dir, CoreApiProject,
+                                new string[] { "[assembly: InternalsVisibleTo(\"" + EditorApiProject + "\")]" },
+                                new string[] { "System.Runtime.CompilerServices" });
+
+            foreach (var item in compileItems)
+            {
+                root.AddItem("Compile", item.RelativeToPath(dir).Replace("/", "\\"));
+            }
+
+            root.Save(path);
+
+            return root.GetGuid().ToString().ToUpper();
+        }
+
+        public static string GenEditorApiProject(string dir, string coreApiHintPath, string[] compileItems)
+        {
+            string path = Path.Combine(dir, EditorApiProject + ".csproj");
+
+            ProjectPropertyGroupElement mainGroup;
+            var root = CreateLibraryProject(EditorApiProject, out mainGroup);
+
+            mainGroup.AddProperty("DocumentationFile", Path.Combine("$(OutputPath)", "$(AssemblyName).xml"));
+            mainGroup.SetProperty("RootNamespace", "Godot");
+
+            GenAssemblyInfoFile(root, dir, EditorApiProject);
+
+            foreach (var item in compileItems)
+            {
+                root.AddItem("Compile", item.RelativeToPath(dir).Replace("/", "\\"));
+            }
+
+            var coreApiRef = root.AddItem("Reference", CoreApiProject);
+            coreApiRef.AddMetadata("HintPath", coreApiHintPath);
+            coreApiRef.AddMetadata("Private", "False");
+
+            root.Save(path);
+
+            return root.GetGuid().ToString().ToUpper();
+        }
+
+        public static string GenGameProject(string dir, string name, string[] compileItems)
+        {
+            string path = Path.Combine(dir, name + ".csproj");
+
+            ProjectPropertyGroupElement mainGroup;
+            var root = CreateLibraryProject(name, out mainGroup);
+
+            mainGroup.SetProperty("OutputPath", Path.Combine(".mono", "temp", "bin", "$(Configuration)"));
+            mainGroup.SetProperty("BaseIntermediateOutputPath", Path.Combine(".mono", "temp", "obj"));
+            mainGroup.SetProperty("IntermediateOutputPath", Path.Combine("$(BaseIntermediateOutputPath)", "$(Configuration)"));
+
+            var toolsGroup = root.AddPropertyGroup();
+            toolsGroup.Condition = " '$(Configuration)|$(Platform)' == 'Tools|AnyCPU' ";
+            toolsGroup.AddProperty("DebugSymbols", "true");
+            toolsGroup.AddProperty("DebugType", "full");
+            toolsGroup.AddProperty("Optimize", "false");
+            toolsGroup.AddProperty("DefineConstants", "DEBUG;TOOLS;");
+            toolsGroup.AddProperty("ErrorReport", "prompt");
+            toolsGroup.AddProperty("WarningLevel", "4");
+            toolsGroup.AddProperty("ConsolePause", "false");
+
+            var coreApiRef = root.AddItem("Reference", CoreApiProject);
+            coreApiRef.AddMetadata("HintPath", Path.Combine("$(ProjectDir)", ".mono", "assemblies", CoreApiProject + ".dll"));
+            coreApiRef.AddMetadata("Private", "False");
+
+            var editorApiRef = root.AddItem("Reference", EditorApiProject);
+            editorApiRef.Condition = " '$(Configuration)' == 'Tools' ";
+            editorApiRef.AddMetadata("HintPath", Path.Combine("$(ProjectDir)", ".mono", "assemblies", EditorApiProject + ".dll"));
+            editorApiRef.AddMetadata("Private", "False");
+
+            GenAssemblyInfoFile(root, dir, name);
+
+            foreach (var item in compileItems)
+            {
+                root.AddItem("Compile", item.RelativeToPath(dir).Replace("/", "\\"));
+            }
+
+            root.Save(path);
+
+            return root.GetGuid().ToString().ToUpper();
+        }
+
+        public static void GenAssemblyInfoFile(ProjectRootElement root, string dir, string name, string[] assemblyLines = null, string[] usingDirectives = null)
+        {
+
+            string propertiesDir = Path.Combine(dir, "Properties");
+            if (!Directory.Exists(propertiesDir))
+                Directory.CreateDirectory(propertiesDir);
+
+            string usingDirectivesText = string.Empty;
+
+            if (usingDirectives != null)
+            {
+                foreach (var usingDirective in usingDirectives)
+                    usingDirectivesText += "\nusing " + usingDirective + ";";
+            }
+
+            string assemblyLinesText = string.Empty;
+
+            if (assemblyLines != null)
+            {
+                foreach (var assemblyLine in assemblyLines)
+                    assemblyLinesText += string.Join("\n", assemblyLines) + "\n";
+            }
+
+            string content = string.Format(assemblyInfoTemplate, usingDirectivesText, name, assemblyLinesText);
+
+            string assemblyInfoFile = Path.Combine(propertiesDir, "AssemblyInfo.cs");
+
+            File.WriteAllText(assemblyInfoFile, content);
+
+            root.AddItem("Compile", assemblyInfoFile.RelativeToPath(dir).Replace("/", "\\"));
+        }
+
+        public static ProjectRootElement CreateLibraryProject(string name, out ProjectPropertyGroupElement mainGroup)
+        {
+            var root = ProjectRootElement.Create();
+            root.DefaultTargets = "Build";
+
+            mainGroup = root.AddPropertyGroup();
+            mainGroup.AddProperty("Configuration", "Debug").Condition = " '$(Configuration)' == '' ";
+            mainGroup.AddProperty("Platform", "AnyCPU").Condition = " '$(Platform)' == '' ";
+            mainGroup.AddProperty("ProjectGuid", "{" + Guid.NewGuid().ToString().ToUpper() + "}");
+            mainGroup.AddProperty("OutputType", "Library");
+            mainGroup.AddProperty("OutputPath", Path.Combine("bin", "$(Configuration)"));
+            mainGroup.AddProperty("RootNamespace", name);
+            mainGroup.AddProperty("AssemblyName", name);
+            mainGroup.AddProperty("TargetFrameworkVersion", "v4.5");
+
+            var debugGroup = root.AddPropertyGroup();
+            debugGroup.Condition = " '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ";
+            debugGroup.AddProperty("DebugSymbols", "true");
+            debugGroup.AddProperty("DebugType", "full");
+            debugGroup.AddProperty("Optimize", "false");
+            debugGroup.AddProperty("DefineConstants", "DEBUG;");
+            debugGroup.AddProperty("ErrorReport", "prompt");
+            debugGroup.AddProperty("WarningLevel", "4");
+            debugGroup.AddProperty("ConsolePause", "false");
+
+            var releaseGroup = root.AddPropertyGroup();
+            releaseGroup.Condition = " '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ";
+            releaseGroup.AddProperty("DebugType", "full");
+            releaseGroup.AddProperty("Optimize", "true");
+            releaseGroup.AddProperty("ErrorReport", "prompt");
+            releaseGroup.AddProperty("WarningLevel", "4");
+            releaseGroup.AddProperty("ConsolePause", "false");
+
+            // References
+            var referenceGroup = root.AddItemGroup();
+            referenceGroup.AddItem("Reference", "System");
+
+            root.AddImport(Path.Combine("$(MSBuildBinPath)", "Microsoft.CSharp.targets").Replace("/", "\\"));
+
+            return root;
+        }
+
+        private static void AddItems(ProjectRootElement elem, string groupName, params string[] items)
+        {
+            var group = elem.AddItemGroup();
+
+            foreach (var item in items)
+            {
+                group.AddItem(groupName, item);
+            }
+        }
+
+        public const string CoreApiProject = "GodotSharp";
+        public const string EditorApiProject = "GodotSharpEditor";
+
+        private const string assemblyInfoTemplate =
+@"using System.Reflection;{0}
+
+// Information about this assembly is defined by the following attributes.
+// Change them to the values specific to your project.
+
+[assembly: AssemblyTitle(""{1}"")]
+[assembly: AssemblyDescription("""")]
+[assembly: AssemblyConfiguration("""")]
+[assembly: AssemblyCompany("""")]
+[assembly: AssemblyProduct("""")]
+[assembly: AssemblyCopyright("""")]
+[assembly: AssemblyTrademark("""")]
+[assembly: AssemblyCulture("""")]
+
+// The assembly version has the format ""{{Major}}.{{Minor}}.{{Build}}.{{Revision}}"".
+// The form ""{{Major}}.{{Minor}}.*"" will automatically update the build and revision,
+// and ""{{Major}}.{{Minor}}.{{Build}}.*"" will update just the revision.
+
+[assembly: AssemblyVersion(""1.0.*"")]
+
+// The following attributes are used to specify the signing key for the assembly,
+// if desired. See the Mono documentation for more information about signing.
+
+//[assembly: AssemblyDelaySign(false)]
+//[assembly: AssemblyKeyFile("""")]
+{2}";
+    }
+}
diff --git a/modules/mono/editor/GodotSharpTools/Project/ProjectUtils.cs b/modules/mono/editor/GodotSharpTools/Project/ProjectUtils.cs
new file mode 100644
index 00000000000..a50b4fb0646
--- /dev/null
+++ b/modules/mono/editor/GodotSharpTools/Project/ProjectUtils.cs
@@ -0,0 +1,17 @@
+using System;
+using System.IO;
+using Microsoft.Build.Construction;
+
+namespace GodotSharpTools.Project
+{
+    public static class ProjectUtils
+    {
+        public static void AddItemToProjectChecked(string projectPath, string itemType, string include)
+        {
+            var dir = Directory.GetParent(projectPath).FullName;
+            var root = ProjectRootElement.Open(projectPath);
+            root.AddItemChecked(itemType, include.RelativeToPath(dir).Replace("/", "\\"));
+            root.Save();
+        }
+    }
+}
diff --git a/modules/mono/editor/GodotSharpTools/Properties/AssemblyInfo.cs b/modules/mono/editor/GodotSharpTools/Properties/AssemblyInfo.cs
new file mode 100644
index 00000000000..7115d8fc713
--- /dev/null
+++ b/modules/mono/editor/GodotSharpTools/Properties/AssemblyInfo.cs
@@ -0,0 +1,27 @@
+using System.Reflection;
+using System.Runtime.CompilerServices;
+
+// Information about this assembly is defined by the following attributes.
+// Change them to the values specific to your project.
+
+[assembly: AssemblyTitle("GodotSharpTools")]
+[assembly: AssemblyDescription("")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("")]
+[assembly: AssemblyProduct("")]
+[assembly: AssemblyCopyright("ignacio")]
+[assembly: AssemblyTrademark("")]
+[assembly: AssemblyCulture("")]
+
+// The assembly version has the format "{Major}.{Minor}.{Build}.{Revision}".
+// The form "{Major}.{Minor}.*" will automatically update the build and revision,
+// and "{Major}.{Minor}.{Build}.*" will update just the revision.
+
+[assembly: AssemblyVersion("1.0.*")]
+
+// The following attributes are used to specify the signing key for the assembly,
+// if desired. See the Mono documentation for more information about signing.
+
+//[assembly: AssemblyDelaySign(false)]
+//[assembly: AssemblyKeyFile("")]
+
diff --git a/modules/mono/editor/GodotSharpTools/StringExtensions.cs b/modules/mono/editor/GodotSharpTools/StringExtensions.cs
new file mode 100644
index 00000000000..b66c86f8ce8
--- /dev/null
+++ b/modules/mono/editor/GodotSharpTools/StringExtensions.cs
@@ -0,0 +1,52 @@
+using System;
+using System.IO;
+
+namespace GodotSharpTools
+{
+    public static class StringExtensions
+    {
+        public static string RelativeToPath(this string path, string dir)
+        {
+            // Make sure the directory ends with a path separator
+            dir = Path.Combine(dir, " ").TrimEnd();
+
+            if (Path.DirectorySeparatorChar == '\\')
+                dir = dir.Replace("/", "\\") + "\\";
+
+            Uri fullPath = new Uri(Path.GetFullPath(path), UriKind.Absolute);
+            Uri relRoot = new Uri(Path.GetFullPath(dir), UriKind.Absolute);
+
+            return relRoot.MakeRelativeUri(fullPath).ToString();
+        }
+
+        public static string NormalizePath(this string path)
+        {
+            bool rooted = path.IsAbsolutePath();
+
+            path = path.Replace('\\', '/');
+
+            string[] parts = path.Split(new[] { '/' }, StringSplitOptions.RemoveEmptyEntries);
+
+            path = string.Join(Path.DirectorySeparatorChar.ToString(), parts).Trim();
+
+            return rooted ? Path.DirectorySeparatorChar.ToString() + path : path;
+        }
+
+        private static readonly string driveRoot = Path.GetPathRoot(Environment.CurrentDirectory);
+
+        public static bool IsAbsolutePath(this string path)
+        {
+            return path.StartsWith("/") || path.StartsWith("\\") || path.StartsWith(driveRoot);
+        }
+
+        public static string CsvEscape(this string value, char delimiter = ',')
+        {
+            bool hasSpecialChar = value.IndexOfAny(new char[] { '\"', '\n', '\r', delimiter }) != -1;
+
+            if (hasSpecialChar)
+                return "\"" + value.Replace("\"", "\"\"") + "\"";
+
+            return value;
+        }
+    }
+}
diff --git a/modules/mono/editor/bindings_generator.cpp b/modules/mono/editor/bindings_generator.cpp
new file mode 100644
index 00000000000..123f00ea100
--- /dev/null
+++ b/modules/mono/editor/bindings_generator.cpp
@@ -0,0 +1,2151 @@
+/*************************************************************************/
+/*  bindings_generator.cpp                                               */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2017 Godot Engine contributors (cf. AUTHORS.md)    */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+#include "bindings_generator.h"
+
+#ifdef DEBUG_METHODS_ENABLED
+
+#include "global_constants.h"
+#include "io/compression.h"
+#include "os/dir_access.h"
+#include "os/file_access.h"
+#include "os/os.h"
+#include "project_settings.h"
+#include "ucaps.h"
+
+#include "../glue/cs_compressed.gen.h"
+#include "../godotsharp_defs.h"
+#include "../mono_gd/gd_mono_marshal.h"
+#include "../utils/path_utils.h"
+#include "../utils/string_utils.h"
+#include "csharp_project.h"
+#include "net_solution.h"
+
+#define CS_INDENT "    "
+
+#define INDENT1 CS_INDENT
+#define INDENT2 INDENT1 INDENT1
+#define INDENT3 INDENT2 INDENT1
+#define INDENT4 INDENT3 INDENT1
+#define INDENT5 INDENT4 INDENT1
+
+#define MEMBER_BEGIN "\n" INDENT2
+
+#define OPEN_BLOCK "{\n"
+#define CLOSE_BLOCK "}\n"
+
+#define OPEN_BLOCK_L2 INDENT2 OPEN_BLOCK INDENT3
+#define OPEN_BLOCK_L3 INDENT3 OPEN_BLOCK INDENT4
+#define OPEN_BLOCK_L4 INDENT4 OPEN_BLOCK INDENT5
+#define CLOSE_BLOCK_L2 INDENT2 CLOSE_BLOCK
+#define CLOSE_BLOCK_L3 INDENT3 CLOSE_BLOCK
+#define CLOSE_BLOCK_L4 INDENT4 CLOSE_BLOCK
+
+#define LOCAL_RET "ret"
+
+#define CS_CLASS_NATIVECALLS "NativeCalls"
+#define CS_CLASS_NATIVECALLS_EDITOR "EditorNativeCalls"
+#define CS_FIELD_MEMORYOWN "memoryOwn"
+#define CS_PARAM_METHODBIND "method"
+#define CS_PARAM_INSTANCE "ptr"
+#define CS_SMETHOD_GETINSTANCE "GetPtr"
+#define CS_FIELD_SINGLETON "instance"
+#define CS_PROP_SINGLETON "Instance"
+#define CS_CLASS_SIGNALAWAITER "SignalAwaiter"
+#define CS_METHOD_CALL "Call"
+
+#define GLUE_HEADER_FILE "glue_header.h"
+#define ICALL_PREFIX "godot_icall_"
+#define SINGLETON_ICALL_SUFFIX "_get_singleton"
+#define ICALL_GET_METHODBIND ICALL_PREFIX "ClassDB_get_method"
+#define ICALL_CONNECT_SIGNAL_AWAITER ICALL_PREFIX "Object_connect_signal_awaiter"
+#define ICALL_OBJECT_DTOR ICALL_PREFIX "Object_Dtor"
+#define C_LOCAL_PTRCALL_ARGS "call_args"
+#define C_MACRO_OBJECT_CONSTRUCT "GODOTSHARP_INSTANCE_OBJECT"
+
+#define C_NS_MONOUTILS "GDMonoUtils"
+#define C_NS_MONOINTERNALS "GDMonoInternals"
+#define C_METHOD_TIE_MANAGED_TO_UNMANAGED C_NS_MONOINTERNALS "::tie_managed_to_unmanaged"
+#define C_METHOD_UNMANAGED_GET_MANAGED C_NS_MONOUTILS "::unmanaged_get_managed"
+
+#define C_NS_MONOMARSHAL "GDMonoMarshal"
+#define C_METHOD_MANAGED_TO_VARIANT C_NS_MONOMARSHAL "::mono_object_to_variant"
+#define C_METHOD_MANAGED_FROM_VARIANT C_NS_MONOMARSHAL "::variant_to_mono_object"
+#define C_METHOD_MONOSTR_TO_GODOT C_NS_MONOMARSHAL "::mono_string_to_godot"
+#define C_METHOD_MONOSTR_FROM_GODOT C_NS_MONOMARSHAL "::mono_string_from_godot"
+#define C_METHOD_MONOARRAY_TO(m_type) C_NS_MONOMARSHAL "::mono_array_to_" #m_type
+#define C_METHOD_MONOARRAY_FROM(m_type) C_NS_MONOMARSHAL "::" #m_type "_to_mono_array"
+#define C_METHOD_MANAGED_TO_DICT C_NS_MONOMARSHAL "::mono_object_to_Dictionary"
+#define C_METHOD_MANAGED_FROM_DICT C_NS_MONOMARSHAL "::Dictionary_to_mono_object"
+
+const char *BindingsGenerator::TypeInterface::DEFAULT_VARARG_C_IN = "\t%0 %1_in = %1;\n";
+
+bool BindingsGenerator::verbose_output = false;
+
+static bool is_csharp_keyword(const String &p_name) {
+
+	// Reserved keywords
+
+	return p_name == "abstract" || p_name == "as" || p_name == "base" || p_name == "bool" ||
+		   p_name == "break" || p_name == "byte" || p_name == "case" || p_name == "catch" ||
+		   p_name == "char" || p_name == "checked" || p_name == "class" || p_name == "const" ||
+		   p_name == "continue" || p_name == "decimal" || p_name == "default" || p_name == "delegate" ||
+		   p_name == "do" || p_name == "double" || p_name == "else" || p_name == "enum" ||
+		   p_name == "event" || p_name == "explicit" || p_name == "extern" || p_name == "false" ||
+		   p_name == "finally" || p_name == "fixed" || p_name == "float" || p_name == "for" ||
+		   p_name == "forech" || p_name == "goto" || p_name == "if" || p_name == "implicit" ||
+		   p_name == "in" || p_name == "int" || p_name == "interface" || p_name == "internal" ||
+		   p_name == "is" || p_name == "lock" || p_name == "long" || p_name == "namespace" ||
+		   p_name == "new" || p_name == "null" || p_name == "object" || p_name == "operator" ||
+		   p_name == "out" || p_name == "override" || p_name == "params" || p_name == "private" ||
+		   p_name == "protected" || p_name == "public" || p_name == "readonly" || p_name == "ref" ||
+		   p_name == "return" || p_name == "sbyte" || p_name == "sealed" || p_name == "short" ||
+		   p_name == "sizeof" || p_name == "stackalloc" || p_name == "static" || p_name == "string" ||
+		   p_name == "struct" || p_name == "switch" || p_name == "this" || p_name == "throw" ||
+		   p_name == "true" || p_name == "try" || p_name == "typeof" || p_name == "uint" || p_name == "ulong" ||
+		   p_name == "unchecked" || p_name == "unsafe" || p_name == "ushort" || p_name == "using" ||
+		   p_name == "virtual" || p_name == "volatile" || p_name == "void" || p_name == "while";
+}
+
+static bool is_singleton_black_listed(const String &p_type) {
+
+	return p_type == "IP_Unix" || p_type == "InputDefault" || p_type == "AudioServerSW" || p_type == "PhysicsServerSW" ||
+		   p_type == "Physics2DServerSW" || p_type == "SpatialSoundServerSW" || p_type == "SpatialSound2DServerSW";
+}
+
+inline static String escape_csharp_keyword(const String &p_name) {
+
+	return is_csharp_keyword(p_name) ? "@" + p_name : p_name;
+}
+
+static String snake_to_pascal_case(const String &p_identifier) {
+
+	String ret;
+	Vector<String> parts = p_identifier.split("_", true);
+
+	for (int i = 0; i < parts.size(); i++) {
+		String part = parts[i];
+
+		if (part.length()) {
+			part[0] = _find_upper(part[0]);
+			ret += part;
+		} else {
+			if (i == 0 || i == (parts.size() - 1)) {
+				// Preserve underscores at the beginning and end
+				ret += "_";
+			} else {
+				// Preserve contiguous underscores
+				if (parts[i - 1].length()) {
+					ret += "__";
+				} else {
+					ret += "_";
+				}
+			}
+		}
+	}
+
+	return ret;
+}
+
+static String snake_to_camel_case(const String &p_identifier) {
+
+	String ret;
+	Vector<String> parts = p_identifier.split("_", true);
+
+	for (int i = 0; i < parts.size(); i++) {
+		String part = parts[i];
+
+		if (part.length()) {
+			if (i != 0)
+				part[0] = _find_upper(part[0]);
+			ret += part;
+		} else {
+			if (i == 0 || i == (parts.size() - 1)) {
+				// Preserve underscores at the beginning and end
+				ret += "_";
+			} else {
+				// Preserve contiguous underscores
+				if (parts[i - 1].length()) {
+					ret += "__";
+				} else {
+					ret += "_";
+				}
+			}
+		}
+	}
+
+	return ret;
+}
+
+void BindingsGenerator::_generate_header_icalls() {
+
+	core_custom_icalls.clear();
+
+	core_custom_icalls.push_back(InternalCall(ICALL_GET_METHODBIND, "IntPtr", "string type, string method"));
+	core_custom_icalls.push_back(InternalCall(ICALL_OBJECT_DTOR, "void", "IntPtr ptr"));
+
+	core_custom_icalls.push_back(InternalCall(ICALL_CONNECT_SIGNAL_AWAITER, "Error",
+			"IntPtr source, string signal, IntPtr target, " CS_CLASS_SIGNALAWAITER " awaiter"));
+
+	core_custom_icalls.push_back(InternalCall(ICALL_PREFIX "NodePath_Ctor", "IntPtr", "string path"));
+	core_custom_icalls.push_back(InternalCall(ICALL_PREFIX "NodePath_Dtor", "void", "IntPtr ptr"));
+	core_custom_icalls.push_back(InternalCall(ICALL_PREFIX "NodePath_operator_String", "string", "IntPtr ptr"));
+
+	core_custom_icalls.push_back(InternalCall(ICALL_PREFIX "RID_Ctor", "IntPtr", "IntPtr from"));
+	core_custom_icalls.push_back(InternalCall(ICALL_PREFIX "RID_Dtor", "void", "IntPtr ptr"));
+
+	core_custom_icalls.push_back(InternalCall(ICALL_PREFIX "String_md5_buffer", "byte[]", "string str"));
+	core_custom_icalls.push_back(InternalCall(ICALL_PREFIX "String_md5_text", "string", "string str"));
+	core_custom_icalls.push_back(InternalCall(ICALL_PREFIX "String_rfind", "int", "string str, string what, int from"));
+	core_custom_icalls.push_back(InternalCall(ICALL_PREFIX "String_rfindn", "int", "string str, string what, int from"));
+	core_custom_icalls.push_back(InternalCall(ICALL_PREFIX "String_sha256_buffer", "byte[]", "string str"));
+	core_custom_icalls.push_back(InternalCall(ICALL_PREFIX "String_sha256_text", "string", "string str"));
+
+	core_custom_icalls.push_back(InternalCall(ICALL_PREFIX "Godot_bytes2var", "object", "byte[] bytes"));
+	core_custom_icalls.push_back(InternalCall(ICALL_PREFIX "Godot_convert", "object", "object what, int type"));
+	core_custom_icalls.push_back(InternalCall(ICALL_PREFIX "Godot_hash", "int", "object var"));
+	core_custom_icalls.push_back(InternalCall(ICALL_PREFIX "Godot_instance_from_id", "Object", "int instance_id"));
+	core_custom_icalls.push_back(InternalCall(ICALL_PREFIX "Godot_print", "void", "object[] what"));
+	core_custom_icalls.push_back(InternalCall(ICALL_PREFIX "Godot_printerr", "void", "object[] what"));
+	core_custom_icalls.push_back(InternalCall(ICALL_PREFIX "Godot_printraw", "void", "object[] what"));
+	core_custom_icalls.push_back(InternalCall(ICALL_PREFIX "Godot_prints", "void", "object[] what"));
+	core_custom_icalls.push_back(InternalCall(ICALL_PREFIX "Godot_printt", "void", "object[] what"));
+	core_custom_icalls.push_back(InternalCall(ICALL_PREFIX "Godot_seed", "void", "int seed"));
+	core_custom_icalls.push_back(InternalCall(ICALL_PREFIX "Godot_str", "string", "object[] what"));
+	core_custom_icalls.push_back(InternalCall(ICALL_PREFIX "Godot_str2var", "object", "string str"));
+	core_custom_icalls.push_back(InternalCall(ICALL_PREFIX "Godot_type_exists", "bool", "string type"));
+	core_custom_icalls.push_back(InternalCall(ICALL_PREFIX "Godot_var2bytes", "byte[]", "object what"));
+	core_custom_icalls.push_back(InternalCall(ICALL_PREFIX "Godot_var2str", "string", "object var"));
+	core_custom_icalls.push_back(InternalCall(ICALL_PREFIX "Godot_weakref", "WeakRef", "IntPtr obj"));
+}
+
+void BindingsGenerator::_generate_method_icalls(const TypeInterface &p_itype) {
+
+	if (p_itype.base_name.length() && obj_types[p_itype.base_name].is_singleton && is_singleton_black_listed(p_itype.name))
+		return;
+
+	for (const List<MethodInterface>::Element *E = p_itype.methods.front(); E; E = E->next()) {
+		const MethodInterface &imethod = E->get();
+
+		if (imethod.is_virtual)
+			continue;
+
+		const TypeInterface *return_type = _get_type_by_name_or_placeholder(imethod.return_type);
+
+		String im_sig = "IntPtr " CS_PARAM_METHODBIND ", IntPtr " CS_PARAM_INSTANCE;
+		String im_unique_sig = imethod.return_type + ",IntPtr,IntPtr";
+
+		// Get arguments information
+		int i = 0;
+		for (const List<ArgumentInterface>::Element *F = imethod.arguments.front(); F; F = F->next()) {
+			const TypeInterface *arg_type = _get_type_by_name_or_placeholder(F->get().type);
+
+			im_sig += ", ";
+			im_sig += arg_type->im_type_in;
+			im_sig += " arg";
+			im_sig += itos(i + 1);
+
+			im_unique_sig += ",";
+			im_unique_sig += get_unique_sig(*arg_type);
+
+			i++;
+		}
+
+		// godot_icall_{argc}_{icallcount}
+		String icall_method = ICALL_PREFIX + itos(imethod.arguments.size()) + "_" + itos(method_icalls.size());
+
+		InternalCall im_icall = InternalCall(p_itype.api_type, icall_method, return_type->im_type_out, im_sig, im_unique_sig);
+
+		List<InternalCall>::Element *match = method_icalls.find(im_icall);
+
+		if (match) {
+			if (p_itype.api_type != ClassDB::API_EDITOR)
+				match->get().editor_only = false;
+			method_icalls_map.insert(&E->get(), &match->get());
+		} else {
+			List<InternalCall>::Element *added = method_icalls.push_back(im_icall);
+			method_icalls_map.insert(&E->get(), &added->get());
+		}
+	}
+}
+
+Error BindingsGenerator::generate_cs_core_project(const String &p_output_dir, bool p_verbose_output) {
+
+	verbose_output = p_verbose_output;
+
+	DirAccessRef da = DirAccess::create(DirAccess::ACCESS_FILESYSTEM);
+	ERR_FAIL_COND_V(!da, ERR_CANT_CREATE);
+
+	if (!DirAccess::exists(p_output_dir)) {
+		Error err = da->make_dir_recursive(p_output_dir);
+		ERR_FAIL_COND_V(err != OK, ERR_CANT_CREATE);
+	}
+
+	da->change_dir(p_output_dir);
+	da->make_dir("Core");
+	da->make_dir("ObjectType");
+
+	String core_dir = path_join(p_output_dir, "Core");
+	String obj_type_dir = path_join(p_output_dir, "ObjectType");
+
+	Vector<String> compile_items;
+
+	NETSolution solution(API_ASSEMBLY_NAME);
+
+	if (!solution.set_path(p_output_dir))
+		return ERR_FILE_NOT_FOUND;
+
+	for (Map<String, TypeInterface>::Element *E = obj_types.front(); E; E = E->next()) {
+		const TypeInterface &itype = E->get();
+
+		if (itype.api_type == ClassDB::API_EDITOR)
+			continue;
+
+		String output_file = path_join(obj_type_dir, E->get().proxy_name + ".cs");
+		Error err = _generate_cs_type(E->get(), output_file);
+
+		if (err == ERR_SKIP)
+			continue;
+
+		if (err != OK)
+			return err;
+
+		compile_items.push_back(output_file);
+	}
+
+#define GENERATE_BUILTIN_TYPE(m_name)                                       \
+	{                                                                       \
+		String output_file = path_join(core_dir, #m_name ".cs");            \
+		Error err = _generate_cs_type(builtin_types[#m_name], output_file); \
+		if (err != OK)                                                      \
+			return err;                                                     \
+		compile_items.push_back(output_file);                               \
+	}
+
+	GENERATE_BUILTIN_TYPE(NodePath);
+	GENERATE_BUILTIN_TYPE(RID);
+
+#undef GENERATE_BUILTIN_TYPE
+
+	// Generate source for GlobalConstants
+
+	String constants_source;
+	int global_constants_count = GlobalConstants::get_global_constant_count();
+
+	if (global_constants_count > 0) {
+		Map<String, DocData::ClassDoc>::Element *match = EditorHelp::get_doc_data()->class_list.find("@Global Scope");
+
+		ERR_EXPLAIN("Could not find `@Global Scope` in DocData");
+		ERR_FAIL_COND_V(!match, ERR_BUG);
+
+		const DocData::ClassDoc &global_scope_doc = match->value();
+
+		for (int i = 0; i < global_constants_count; i++) {
+			const DocData::ConstantDoc &const_doc = global_scope_doc.constants[i];
+
+			if (i > 0)
+				constants_source += MEMBER_BEGIN;
+
+			if (const_doc.description.size()) {
+				constants_source += "/// <summary>\n";
+
+				Vector<String> description_lines = const_doc.description.split("\n");
+
+				for (int i = 0; i < description_lines.size(); i++) {
+					if (description_lines[i].size()) {
+						constants_source += INDENT2 "/// ";
+						constants_source += description_lines[i].strip_edges().xml_escape();
+						constants_source += "\n";
+					}
+				}
+
+				constants_source += INDENT2 "/// </summary>" MEMBER_BEGIN;
+			}
+
+			constants_source += "public const int ";
+			constants_source += GlobalConstants::get_global_constant_name(i);
+			constants_source += " = ";
+			constants_source += itos(GlobalConstants::get_global_constant_value(i));
+			constants_source += ";";
+		}
+	}
+
+	// Generate sources from compressed files
+
+	Map<String, CompressedFile> compressed_files;
+	get_compressed_files(compressed_files);
+
+	for (Map<String, CompressedFile>::Element *E = compressed_files.front(); E; E = E->next()) {
+		const String &file_name = E->key();
+		const CompressedFile &file_data = E->value();
+
+		String output_file = path_join(core_dir, file_name);
+
+		Vector<uint8_t> data;
+		data.resize(file_data.uncompressed_size);
+		Compression::decompress(data.ptr(), file_data.uncompressed_size, file_data.data, file_data.compressed_size, Compression::MODE_DEFLATE);
+
+		if (file_name.get_basename() == BINDINGS_GLOBAL_SCOPE_CLASS) {
+			// GD.cs must be formatted to include the generated global constants
+			String data_str = String::utf8(reinterpret_cast<const char *>(data.ptr()), data.size());
+
+			Dictionary format_keys;
+			format_keys["GodotGlobalConstants"] = constants_source;
+			data_str = data_str.format(format_keys, "/*{_}*/");
+
+			CharString data_utf8 = data_str.utf8();
+			data.resize(data_utf8.length());
+			copymem(data.ptr(), reinterpret_cast<const uint8_t *>(data_utf8.get_data()), data_utf8.length());
+		}
+
+		FileAccessRef file = FileAccess::open(output_file, FileAccess::WRITE);
+		ERR_FAIL_COND_V(!file, ERR_FILE_CANT_WRITE);
+		file->store_buffer(data.ptr(), data.size());
+		file->close();
+
+		compile_items.push_back(output_file);
+	}
+
+	List<String> cs_icalls_content;
+
+	cs_icalls_content.push_back("using System;\n"
+								"using System.Runtime.CompilerServices;\n"
+								"using System.Collections.Generic;\n"
+								"\n");
+	cs_icalls_content.push_back("namespace " BINDINGS_NAMESPACE "\n" OPEN_BLOCK);
+	cs_icalls_content.push_back(INDENT1 "internal static class " CS_CLASS_NATIVECALLS "\n" INDENT1 OPEN_BLOCK);
+
+#define ADD_INTERNAL_CALL(m_icall)                                                             \
+	if (!m_icall.editor_only) {                                                                \
+		cs_icalls_content.push_back(INDENT2 "[MethodImpl(MethodImplOptions.InternalCall)]\n"); \
+		cs_icalls_content.push_back(INDENT2 "internal extern static ");                        \
+		cs_icalls_content.push_back(m_icall.im_type_out + " ");                                \
+		cs_icalls_content.push_back(m_icall.name + "(");                                       \
+		cs_icalls_content.push_back(m_icall.im_sig + ");\n");                                  \
+	}
+
+	for (const List<InternalCall>::Element *E = core_custom_icalls.front(); E; E = E->next())
+		ADD_INTERNAL_CALL(E->get());
+	for (const List<InternalCall>::Element *E = method_icalls.front(); E; E = E->next())
+		ADD_INTERNAL_CALL(E->get());
+
+#undef ADD_INTERNAL_CALL
+
+	cs_icalls_content.push_back(INDENT1 CLOSE_BLOCK CLOSE_BLOCK);
+
+	String internal_methods_file = path_join(core_dir, CS_CLASS_NATIVECALLS ".cs");
+
+	Error err = _save_file(internal_methods_file, cs_icalls_content);
+	if (err != OK)
+		return err;
+
+	compile_items.push_back(internal_methods_file);
+
+	String guid = CSharpProject::generate_core_api_project(p_output_dir, compile_items);
+
+	solution.add_new_project(API_ASSEMBLY_NAME, guid);
+
+	Error sln_error = solution.save();
+	if (sln_error != OK) {
+		ERR_PRINT("Could not to save .NET solution.");
+		return sln_error;
+	}
+
+	return OK;
+}
+
+Error BindingsGenerator::generate_cs_editor_project(const String &p_output_dir, const String &p_core_dll_path, bool p_verbose_output) {
+
+	verbose_output = p_verbose_output;
+
+	DirAccessRef da = DirAccess::create(DirAccess::ACCESS_FILESYSTEM);
+	ERR_FAIL_COND_V(!da, ERR_CANT_CREATE);
+
+	if (!DirAccess::exists(p_output_dir)) {
+		Error err = da->make_dir_recursive(p_output_dir);
+		ERR_FAIL_COND_V(err != OK, ERR_CANT_CREATE);
+	}
+
+	da->change_dir(p_output_dir);
+	da->make_dir("Core");
+	da->make_dir("ObjectType");
+
+	String core_dir = path_join(p_output_dir, "Core");
+	String obj_type_dir = path_join(p_output_dir, "ObjectType");
+
+	Vector<String> compile_items;
+
+	NETSolution solution(EDITOR_API_ASSEMBLY_NAME);
+
+	if (!solution.set_path(p_output_dir))
+		return ERR_FILE_NOT_FOUND;
+
+	for (Map<String, TypeInterface>::Element *E = obj_types.front(); E; E = E->next()) {
+		const TypeInterface &itype = E->get();
+
+		if (itype.api_type != ClassDB::API_EDITOR)
+			continue;
+
+		String output_file = path_join(obj_type_dir, E->get().proxy_name + ".cs");
+		Error err = _generate_cs_type(E->get(), output_file);
+
+		if (err == ERR_SKIP)
+			continue;
+
+		if (err != OK)
+			return err;
+
+		compile_items.push_back(output_file);
+	}
+
+	List<String> cs_icalls_content;
+
+	cs_icalls_content.push_back("using System;\n"
+								"using System.Runtime.CompilerServices;\n"
+								"using System.Collections.Generic;\n"
+								"\n");
+	cs_icalls_content.push_back("namespace " BINDINGS_NAMESPACE "\n" OPEN_BLOCK);
+	cs_icalls_content.push_back(INDENT1 "internal static class " CS_CLASS_NATIVECALLS_EDITOR "\n" INDENT1 OPEN_BLOCK);
+
+#define ADD_INTERNAL_CALL(m_icall)                                                             \
+	if (m_icall.editor_only) {                                                                 \
+		cs_icalls_content.push_back(INDENT2 "[MethodImpl(MethodImplOptions.InternalCall)]\n"); \
+		cs_icalls_content.push_back(INDENT2 "internal extern static ");                        \
+		cs_icalls_content.push_back(m_icall.im_type_out + " ");                                \
+		cs_icalls_content.push_back(m_icall.name + "(");                                       \
+		cs_icalls_content.push_back(m_icall.im_sig + ");\n");                                  \
+	}
+
+	for (const List<InternalCall>::Element *E = editor_custom_icalls.front(); E; E = E->next())
+		ADD_INTERNAL_CALL(E->get());
+	for (const List<InternalCall>::Element *E = method_icalls.front(); E; E = E->next())
+		ADD_INTERNAL_CALL(E->get());
+
+#undef ADD_INTERNAL_CALL
+
+	cs_icalls_content.push_back(INDENT1 CLOSE_BLOCK CLOSE_BLOCK);
+
+	String internal_methods_file = path_join(core_dir, CS_CLASS_NATIVECALLS_EDITOR ".cs");
+
+	Error err = _save_file(internal_methods_file, cs_icalls_content);
+	if (err != OK)
+		return err;
+
+	compile_items.push_back(internal_methods_file);
+
+	String guid = CSharpProject::generate_editor_api_project(p_output_dir, p_core_dll_path, compile_items);
+
+	solution.add_new_project(EDITOR_API_ASSEMBLY_NAME, guid);
+
+	Error sln_error = solution.save();
+	if (sln_error != OK) {
+		ERR_PRINT("Could not to save .NET solution.");
+		return sln_error;
+	}
+
+	return OK;
+}
+
+// TODO: there are constants that hide inherited members. must explicitly use `new` to avoid warnings
+// e.g.: warning CS0108: 'SpriteBase3D.FLAG_MAX' hides inherited member 'GeometryInstance.FLAG_MAX'. Use the new keyword if hiding was intended.
+Error BindingsGenerator::_generate_cs_type(const TypeInterface &itype, const String &p_output_file) {
+
+	int method_bind_count = 0;
+
+	bool is_derived_type = itype.base_name.length();
+
+	if (is_derived_type && obj_types[itype.base_name].is_singleton && is_singleton_black_listed(itype.name))
+		return ERR_SKIP;
+
+	List<InternalCall> &custom_icalls = itype.api_type == ClassDB::API_EDITOR ? editor_custom_icalls : core_custom_icalls;
+
+	if (verbose_output)
+		OS::get_singleton()->print(String("Generating " + itype.proxy_name + ".cs...\n").utf8());
+
+	String ctor_method(ICALL_PREFIX + itype.proxy_name + "_Ctor");
+
+	List<String> cs_file;
+
+	cs_file.push_back("using System;\n"); // IntPtr
+
+	if (itype.requires_collections)
+		cs_file.push_back("using System.Collections.Generic;\n"); // Dictionary
+
+	cs_file.push_back("\nnamespace " BINDINGS_NAMESPACE "\n" OPEN_BLOCK);
+
+	const DocData::ClassDoc *class_doc = itype.class_doc;
+
+	if (class_doc && class_doc->description.size()) {
+		cs_file.push_back(INDENT1 "/// <summary>\n");
+
+		Vector<String> description_lines = class_doc->description.split("\n");
+
+		for (int i = 0; i < description_lines.size(); i++) {
+			if (description_lines[i].size()) {
+				cs_file.push_back(INDENT1 "/// ");
+				cs_file.push_back(description_lines[i].strip_edges().xml_escape());
+				cs_file.push_back("\n");
+			}
+		}
+
+		cs_file.push_back(INDENT1 "/// </summary>\n");
+	}
+
+	cs_file.push_back(INDENT1 "public ");
+	cs_file.push_back(itype.is_singleton ? "static class " : "class ");
+	cs_file.push_back(itype.proxy_name);
+
+	if (itype.is_singleton || !itype.is_object_type) {
+		cs_file.push_back("\n");
+	} else if (!is_derived_type) {
+		cs_file.push_back(" : IDisposable\n");
+	} else if (obj_types.has(itype.base_name)) {
+		cs_file.push_back(" : ");
+		cs_file.push_back(obj_types[itype.base_name].proxy_name);
+		cs_file.push_back("\n");
+	} else {
+		ERR_PRINTS("Base type ' " + itype.base_name + "' does not exist");
+		return ERR_INVALID_DATA;
+	}
+
+	cs_file.push_back(INDENT1 "{");
+
+	if (class_doc) {
+
+		// Add constants
+
+		for (int i = 0; i < class_doc->constants.size(); i++) {
+			const DocData::ConstantDoc &const_doc = class_doc->constants[i];
+
+			if (const_doc.description.size()) {
+				cs_file.push_back(MEMBER_BEGIN "/// <summary>\n");
+
+				Vector<String> description_lines = const_doc.description.split("\n");
+
+				for (int i = 0; i < description_lines.size(); i++) {
+					if (description_lines[i].size()) {
+						cs_file.push_back(INDENT2 "/// ");
+						cs_file.push_back(description_lines[i].strip_edges().xml_escape());
+						cs_file.push_back("\n");
+					}
+				}
+
+				cs_file.push_back(INDENT2 "/// </summary>");
+			}
+
+			cs_file.push_back(MEMBER_BEGIN "public const int ");
+			cs_file.push_back(const_doc.name);
+			cs_file.push_back(" = ");
+			cs_file.push_back(const_doc.value);
+			cs_file.push_back(";");
+		}
+
+		if (class_doc->constants.size())
+			cs_file.push_back("\n");
+
+		// Add properties
+
+		const Vector<DocData::PropertyDoc> &properties = itype.class_doc->properties;
+
+		for (int i = 0; i < properties.size(); i++) {
+			const DocData::PropertyDoc &prop_doc = properties[i];
+
+			const MethodInterface *setter = itype.find_method_by_name(prop_doc.setter);
+
+			// Search it in base types too
+			const TypeInterface *current_type = &itype;
+			while (!setter && current_type->base_name.length()) {
+				Map<String, TypeInterface>::Element *base_match = obj_types.find(current_type->base_name);
+				ERR_FAIL_NULL_V(base_match, ERR_BUG);
+				current_type = &base_match->get();
+				setter = current_type->find_method_by_name(prop_doc.setter);
+			}
+
+			const MethodInterface *getter = itype.find_method_by_name(prop_doc.getter);
+
+			// Search it in base types too
+			current_type = &itype;
+			while (!getter && current_type->base_name.length()) {
+				Map<String, TypeInterface>::Element *base_match = obj_types.find(current_type->base_name);
+				ERR_FAIL_NULL_V(base_match, ERR_BUG);
+				current_type = &base_match->get();
+				getter = current_type->find_method_by_name(prop_doc.getter);
+			}
+
+			ERR_FAIL_COND_V(!setter && !getter, ERR_BUG);
+
+			bool is_valid = false;
+			int prop_index = ClassDB::get_property_index(itype.name, prop_doc.name, &is_valid);
+			ERR_FAIL_COND_V(!is_valid, ERR_BUG);
+
+			if (setter) {
+				int setter_argc = prop_index != -1 ? 2 : 1;
+				ERR_FAIL_COND_V(setter->arguments.size() != setter_argc, ERR_BUG);
+			}
+
+			if (getter) {
+				int getter_argc = prop_index != -1 ? 1 : 0;
+				ERR_FAIL_COND_V(getter->arguments.size() != getter_argc, ERR_BUG);
+			}
+
+			if (getter && setter) {
+				ERR_FAIL_COND_V(getter->return_type != setter->arguments.back()->get().type, ERR_BUG);
+			}
+
+			// Let's not trust PropertyDoc::type
+			String proptype_name = getter ? getter->return_type : setter->arguments.back()->get().type;
+
+			const TypeInterface *prop_itype = _get_type_by_name_or_null(proptype_name);
+			if (!prop_itype) {
+				// Try with underscore prefix
+				prop_itype = _get_type_by_name_or_null("_" + proptype_name);
+			}
+
+			ERR_FAIL_NULL_V(prop_itype, ERR_BUG);
+
+			String prop_proxy_name = escape_csharp_keyword(snake_to_pascal_case(prop_doc.name));
+
+			// Prevent property and enclosing type from sharing the same name
+			if (prop_proxy_name == itype.proxy_name) {
+				if (verbose_output) {
+					WARN_PRINTS("Name of property `" + prop_proxy_name + "` is ambiguous with the name of its class `" +
+								itype.proxy_name + "`. Renaming property to `" + prop_proxy_name + "_`");
+				}
+
+				prop_proxy_name += "_";
+			}
+
+			if (prop_doc.description.size()) {
+				cs_file.push_back(MEMBER_BEGIN "/// <summary>\n");
+
+				Vector<String> description_lines = prop_doc.description.split("\n");
+
+				for (int i = 0; i < description_lines.size(); i++) {
+					if (description_lines[i].size()) {
+						cs_file.push_back(INDENT2 "/// ");
+						cs_file.push_back(description_lines[i].strip_edges().xml_escape());
+						cs_file.push_back("\n");
+					}
+				}
+
+				cs_file.push_back(INDENT2 "/// </summary>");
+			}
+
+			cs_file.push_back(MEMBER_BEGIN "public ");
+
+			if (itype.is_singleton)
+				cs_file.push_back("static ");
+
+			cs_file.push_back(prop_itype->cs_type);
+			cs_file.push_back(" ");
+			cs_file.push_back(prop_proxy_name.replace("/", "__"));
+			cs_file.push_back("\n" INDENT2 OPEN_BLOCK);
+
+			if (getter) {
+				cs_file.push_back(INDENT3 "get\n" OPEN_BLOCK_L3);
+				cs_file.push_back("return ");
+				cs_file.push_back(getter->proxy_name + "(");
+				if (prop_index != -1)
+					cs_file.push_back(itos(prop_index));
+				cs_file.push_back(");\n" CLOSE_BLOCK_L3);
+			}
+
+			if (setter) {
+				cs_file.push_back(INDENT3 "set\n" OPEN_BLOCK_L3);
+				cs_file.push_back(setter->proxy_name + "(");
+				if (prop_index != -1)
+					cs_file.push_back(itos(prop_index) + ", ");
+				cs_file.push_back("value);\n" CLOSE_BLOCK_L3);
+			}
+
+			cs_file.push_back(CLOSE_BLOCK_L2);
+		}
+
+		if (class_doc->properties.size())
+			cs_file.push_back("\n");
+	}
+
+	if (!itype.is_object_type) {
+		cs_file.push_back(MEMBER_BEGIN "private const string " BINDINGS_NATIVE_NAME_FIELD " = \"" + itype.name + "\";\n");
+		cs_file.push_back(MEMBER_BEGIN "private bool disposed = false;\n");
+		cs_file.push_back(MEMBER_BEGIN "internal IntPtr " BINDINGS_PTR_FIELD ";\n");
+
+		cs_file.push_back(MEMBER_BEGIN "internal static IntPtr " CS_SMETHOD_GETINSTANCE "(");
+		cs_file.push_back(itype.proxy_name);
+		cs_file.push_back(" instance)\n" OPEN_BLOCK_L2 "return instance == null ? IntPtr.Zero : instance." BINDINGS_PTR_FIELD ";\n" CLOSE_BLOCK_L2);
+
+		// Add Destructor
+		cs_file.push_back(MEMBER_BEGIN "~");
+		cs_file.push_back(itype.proxy_name);
+		cs_file.push_back("()\n" OPEN_BLOCK_L2 "Dispose(false);\n" CLOSE_BLOCK_L2);
+
+		// Add the Dispose from IDisposable
+		cs_file.push_back(MEMBER_BEGIN "public void Dispose()\n" OPEN_BLOCK_L2 "Dispose(true);\n" INDENT3 "GC.SuppressFinalize(this);\n" CLOSE_BLOCK_L2);
+
+		// Add the virtual Dispose
+		cs_file.push_back(MEMBER_BEGIN "public virtual void Dispose(bool disposing)\n" OPEN_BLOCK_L2
+									   "if (disposed) return;\n" INDENT3
+									   "if (" BINDINGS_PTR_FIELD " != IntPtr.Zero)\n" OPEN_BLOCK_L3 "NativeCalls.godot_icall_");
+		cs_file.push_back(itype.proxy_name);
+		cs_file.push_back("_Dtor(" BINDINGS_PTR_FIELD ");\n" INDENT5 BINDINGS_PTR_FIELD " = IntPtr.Zero;\n" CLOSE_BLOCK_L3 INDENT3
+						  "GC.SuppressFinalize(this);\n" INDENT3 "disposed = true;\n" CLOSE_BLOCK_L2);
+
+		cs_file.push_back(MEMBER_BEGIN "internal ");
+		cs_file.push_back(itype.proxy_name);
+		cs_file.push_back("(IntPtr " BINDINGS_PTR_FIELD ")\n" OPEN_BLOCK_L2 "this." BINDINGS_PTR_FIELD " = " BINDINGS_PTR_FIELD ";\n" CLOSE_BLOCK_L2);
+
+		cs_file.push_back(MEMBER_BEGIN "public bool HasValidHandle()\n" OPEN_BLOCK_L2
+									   "return " BINDINGS_PTR_FIELD " == IntPtr.Zero;\n" CLOSE_BLOCK_L2);
+	} else if (itype.is_singleton) {
+		// Add the type name and the singleton pointer as static fields
+
+		cs_file.push_back(MEMBER_BEGIN "private const string " BINDINGS_NATIVE_NAME_FIELD " = \"");
+		cs_file.push_back(itype.name);
+		cs_file.push_back("\";\n");
+
+		cs_file.push_back(INDENT2 "internal static IntPtr " BINDINGS_PTR_FIELD " = ");
+		cs_file.push_back(itype.api_type == ClassDB::API_EDITOR ? CS_CLASS_NATIVECALLS_EDITOR : CS_CLASS_NATIVECALLS);
+		cs_file.push_back("." ICALL_PREFIX);
+		cs_file.push_back(itype.name);
+		cs_file.push_back(SINGLETON_ICALL_SUFFIX "();\n");
+	} else {
+		// Add member fields
+
+		cs_file.push_back(MEMBER_BEGIN "private const string " BINDINGS_NATIVE_NAME_FIELD " = \"");
+		cs_file.push_back(itype.name);
+		cs_file.push_back("\";\n");
+
+		// Only the base class stores the pointer to the native object
+		// This pointer is expected to be and must be of type Object*
+		if (!is_derived_type) {
+			cs_file.push_back(MEMBER_BEGIN "private bool disposed = false;\n");
+			cs_file.push_back(INDENT2 "internal IntPtr " BINDINGS_PTR_FIELD ";\n");
+			cs_file.push_back(INDENT2 "internal bool " CS_FIELD_MEMORYOWN ";\n");
+		}
+
+		// Add default constructor
+		if (itype.is_instantiable) {
+			cs_file.push_back(MEMBER_BEGIN "public ");
+			cs_file.push_back(itype.proxy_name);
+			cs_file.push_back("() : this(");
+			cs_file.push_back(itype.memory_own ? "true" : "false");
+
+			// The default constructor may also be called by the engine when instancing existing native objects
+			// The engine will initialize the pointer field of the managed side before calling the constructor
+			// This is why we only allocate a new native object from the constructor if the pointer field is not set
+			cs_file.push_back(")\n" OPEN_BLOCK_L2 "if (" BINDINGS_PTR_FIELD " == IntPtr.Zero)\n" INDENT4 BINDINGS_PTR_FIELD " = ");
+			cs_file.push_back(itype.api_type == ClassDB::API_EDITOR ? CS_CLASS_NATIVECALLS_EDITOR : CS_CLASS_NATIVECALLS);
+			cs_file.push_back("." + ctor_method);
+			cs_file.push_back("(this);\n" CLOSE_BLOCK_L2);
+		} else {
+			// Hide the constructor
+			cs_file.push_back(MEMBER_BEGIN "internal ");
+			cs_file.push_back(itype.proxy_name);
+			cs_file.push_back("() {}\n");
+		}
+
+		// Add.. em.. trick constructor. Sort of.
+		cs_file.push_back(MEMBER_BEGIN "internal ");
+		cs_file.push_back(itype.proxy_name);
+		if (is_derived_type) {
+			cs_file.push_back("(bool " CS_FIELD_MEMORYOWN ") : base(" CS_FIELD_MEMORYOWN ") {}\n");
+		} else {
+			cs_file.push_back("(bool " CS_FIELD_MEMORYOWN ")\n" OPEN_BLOCK_L2
+							  "this." CS_FIELD_MEMORYOWN " = " CS_FIELD_MEMORYOWN ";\n" CLOSE_BLOCK_L2);
+		}
+
+		// Add methods
+
+		if (!is_derived_type) {
+			cs_file.push_back(MEMBER_BEGIN "public bool HasValidHandle()\n" OPEN_BLOCK_L2
+										   "return " BINDINGS_PTR_FIELD " == IntPtr.Zero;\n" CLOSE_BLOCK_L2);
+
+			cs_file.push_back(MEMBER_BEGIN "internal static IntPtr " CS_SMETHOD_GETINSTANCE "(Object instance)\n" OPEN_BLOCK_L2
+										   "return instance == null ? IntPtr.Zero : instance." BINDINGS_PTR_FIELD ";\n" CLOSE_BLOCK_L2);
+		}
+
+		if (!is_derived_type) {
+			// Add destructor
+			cs_file.push_back(MEMBER_BEGIN "~");
+			cs_file.push_back(itype.proxy_name);
+			cs_file.push_back("()\n" OPEN_BLOCK_L2 "Dispose(false);\n" CLOSE_BLOCK_L2);
+
+			// Add the Dispose from IDisposable
+			cs_file.push_back(MEMBER_BEGIN "public void Dispose()\n" OPEN_BLOCK_L2 "Dispose(true);\n" INDENT3 "GC.SuppressFinalize(this);\n" CLOSE_BLOCK_L2);
+
+			// Add the virtual Dispose
+			cs_file.push_back(MEMBER_BEGIN "public virtual void Dispose(bool disposing)\n" OPEN_BLOCK_L2
+										   "if (disposed) return;\n" INDENT3
+										   "if (" BINDINGS_PTR_FIELD " != IntPtr.Zero)\n" OPEN_BLOCK_L3
+										   "if (" CS_FIELD_MEMORYOWN ")\n" OPEN_BLOCK_L4 CS_FIELD_MEMORYOWN
+										   " = false;\n" INDENT5 CS_CLASS_NATIVECALLS "." ICALL_OBJECT_DTOR
+										   "(" BINDINGS_PTR_FIELD ");\n" INDENT5 BINDINGS_PTR_FIELD
+										   " = IntPtr.Zero;\n" CLOSE_BLOCK_L4 CLOSE_BLOCK_L3 INDENT3
+										   "GC.SuppressFinalize(this);\n" INDENT3 "disposed = true;\n" CLOSE_BLOCK_L2);
+
+			Map<String, TypeInterface>::Element *array_itype = builtin_types.find("Array");
+
+			if (!array_itype) {
+				ERR_PRINT("BUG: Array type interface not found!");
+				return ERR_BUG;
+			}
+
+			cs_file.push_back(MEMBER_BEGIN "private void _AwaitedSignalCallback(");
+			cs_file.push_back(array_itype->get().cs_type);
+			cs_file.push_back(" args, SignalAwaiter awaiter)\n" OPEN_BLOCK_L2 "awaiter.SignalCallback(args);\n" CLOSE_BLOCK_L2);
+
+			Map<String, TypeInterface>::Element *object_itype = obj_types.find("Object");
+
+			if (!object_itype) {
+				ERR_PRINT("BUG: Array type interface not found!");
+				return ERR_BUG;
+			}
+
+			cs_file.push_back(MEMBER_BEGIN "public " CS_CLASS_SIGNALAWAITER " ToSignal(");
+			cs_file.push_back(object_itype->get().cs_type);
+			cs_file.push_back(" source, string signal)\n" OPEN_BLOCK_L2
+							  "return new " CS_CLASS_SIGNALAWAITER "(source, signal, this);\n" CLOSE_BLOCK_L2);
+		}
+	}
+
+	Map<String, String>::Element *extra_member = extra_members.find(itype.name);
+	if (extra_member)
+		cs_file.push_back(extra_member->get());
+
+	for (const List<MethodInterface>::Element *E = itype.methods.front(); E; E = E->next()) {
+		const MethodInterface &imethod = E->get();
+
+		const TypeInterface *return_type = _get_type_by_name_or_placeholder(imethod.return_type);
+
+		String method_bind_field = "method_bind_" + itos(method_bind_count);
+
+		String icall_params = method_bind_field + ", " + sformat(itype.cs_in, "this");
+		String arguments_sig;
+		String cs_in_statements;
+
+		List<String> default_args_doc;
+
+		// Retrieve information from the arguments
+		for (const List<ArgumentInterface>::Element *F = imethod.arguments.front(); F; F = F->next()) {
+			const ArgumentInterface &iarg = F->get();
+			const TypeInterface *arg_type = _get_type_by_name_or_placeholder(iarg.type);
+
+			// Add the current arguments to the signature
+			// If the argument has a default value which is not a constant, we will make it Nullable
+			{
+				if (F != imethod.arguments.front())
+					arguments_sig += ", ";
+
+				if (iarg.def_param_mode == ArgumentInterface::NULLABLE_VAL)
+					arguments_sig += "Nullable<";
+
+				arguments_sig += arg_type->cs_type;
+
+				if (iarg.def_param_mode == ArgumentInterface::NULLABLE_VAL)
+					arguments_sig += "> ";
+				else
+					arguments_sig += " ";
+
+				arguments_sig += iarg.name;
+
+				if (iarg.default_argument.size()) {
+					if (iarg.def_param_mode != ArgumentInterface::CONSTANT)
+						arguments_sig += " = null";
+					else
+						arguments_sig += " = " + sformat(iarg.default_argument, arg_type->cs_type);
+				}
+			}
+
+			icall_params += ", ";
+
+			if (iarg.default_argument.size() && iarg.def_param_mode != ArgumentInterface::CONSTANT) {
+				// The default value of an argument must be constant. Otherwise we make it Nullable and do the following:
+				// Type arg_in = arg.HasValue ? arg.Value : <non-const default value>;
+				String arg_in = iarg.name;
+				arg_in += "_in";
+
+				cs_in_statements += arg_type->cs_type;
+				cs_in_statements += " ";
+				cs_in_statements += arg_in;
+				cs_in_statements += " = ";
+				cs_in_statements += iarg.name;
+
+				if (iarg.def_param_mode == ArgumentInterface::NULLABLE_VAL)
+					cs_in_statements += ".HasValue ? ";
+				else
+					cs_in_statements += " != null ? ";
+
+				cs_in_statements += iarg.name;
+
+				if (iarg.def_param_mode == ArgumentInterface::NULLABLE_VAL)
+					cs_in_statements += ".Value : ";
+				else
+					cs_in_statements += " : ";
+
+				String def_arg = sformat(iarg.default_argument, arg_type->cs_type);
+
+				cs_in_statements += def_arg;
+				cs_in_statements += ";\n" INDENT3;
+
+				icall_params += arg_type->cs_in.empty() ? arg_in : sformat(arg_type->cs_in, arg_in);
+
+				default_args_doc.push_back(INDENT2 "/// <param name=\"" + iarg.name + "\">If the param is null, then the default value is " + def_arg + "</param>\n");
+			} else {
+				icall_params += arg_type->cs_in.empty() ? iarg.name : sformat(arg_type->cs_in, iarg.name);
+			}
+		}
+
+		// Generate method
+		{
+			if (!imethod.is_virtual && !imethod.requires_object_call) {
+				cs_file.push_back(MEMBER_BEGIN "private ");
+				cs_file.push_back(itype.is_singleton ? "static IntPtr " : "IntPtr ");
+				cs_file.push_back(method_bind_field + " = " CS_CLASS_NATIVECALLS "." ICALL_GET_METHODBIND "(" BINDINGS_NATIVE_NAME_FIELD ", \"");
+				cs_file.push_back(imethod.name);
+				cs_file.push_back("\");\n");
+			}
+
+			if (imethod.method_doc && imethod.method_doc->description.size()) {
+				cs_file.push_back(MEMBER_BEGIN "/// <summary>\n");
+
+				Vector<String> description_lines = imethod.method_doc->description.split("\n");
+
+				for (int i = 0; i < description_lines.size(); i++) {
+					if (description_lines[i].size()) {
+						cs_file.push_back(INDENT2 "/// ");
+						cs_file.push_back(description_lines[i].strip_edges().xml_escape());
+						cs_file.push_back("\n");
+					}
+				}
+
+				for (List<String>::Element *E = default_args_doc.front(); E; E = E->next()) {
+					cs_file.push_back(E->get().xml_escape());
+				}
+
+				cs_file.push_back(INDENT2 "/// </summary>");
+			}
+
+			if (!imethod.is_internal) {
+				cs_file.push_back(MEMBER_BEGIN "[GodotMethod(\"");
+				cs_file.push_back(imethod.name);
+				cs_file.push_back("\")]");
+			}
+
+			cs_file.push_back(MEMBER_BEGIN);
+			cs_file.push_back(imethod.is_internal ? "internal " : "public ");
+
+			if (itype.is_singleton) {
+				cs_file.push_back("static ");
+			} else if (imethod.is_virtual) {
+				cs_file.push_back("virtual ");
+			}
+
+			cs_file.push_back(return_type->cs_type + " ");
+			cs_file.push_back(imethod.proxy_name + "(");
+			cs_file.push_back(arguments_sig + ")\n" OPEN_BLOCK_L2);
+
+			if (imethod.is_virtual) {
+				// Godot virtual method must be overridden, therefore we return a default value by default.
+
+				if (return_type->name == "void") {
+					cs_file.push_back("return;\n" CLOSE_BLOCK_L2);
+				} else {
+					cs_file.push_back("return default(");
+					cs_file.push_back(return_type->cs_type);
+					cs_file.push_back(");\n" CLOSE_BLOCK_L2);
+				}
+
+				continue;
+			}
+
+			if (imethod.requires_object_call) {
+				// Fallback to Godot's object.Call(string, params)
+
+				cs_file.push_back(CS_METHOD_CALL "(\"");
+				cs_file.push_back(imethod.name);
+				cs_file.push_back("\"");
+
+				for (const List<ArgumentInterface>::Element *F = imethod.arguments.front(); F; F = F->next()) {
+					cs_file.push_back(", ");
+					cs_file.push_back(F->get().name);
+				}
+
+				cs_file.push_back(");\n" CLOSE_BLOCK_L2);
+
+				continue;
+			}
+
+			const Map<const MethodInterface *, const InternalCall *>::Element *match = method_icalls_map.find(&E->get());
+			ERR_FAIL_NULL_V(match, ERR_BUG);
+
+			const InternalCall *im_icall = match->value();
+
+			String im_call = im_icall->editor_only ? CS_CLASS_NATIVECALLS_EDITOR : CS_CLASS_NATIVECALLS;
+			im_call += "." + im_icall->name + "(" + icall_params + ");\n";
+
+			if (imethod.arguments.size())
+				cs_file.push_back(cs_in_statements);
+
+			if (return_type->name == "void") {
+				cs_file.push_back(im_call);
+			} else if (return_type->cs_out.empty()) {
+				cs_file.push_back("return " + im_call);
+			} else {
+				cs_file.push_back(return_type->im_type_out);
+				cs_file.push_back(" " LOCAL_RET " = ");
+				cs_file.push_back(im_call);
+				cs_file.push_back(INDENT3);
+				cs_file.push_back(sformat(return_type->cs_out, LOCAL_RET) + "\n");
+			}
+
+			cs_file.push_back(CLOSE_BLOCK_L2);
+		}
+
+		method_bind_count++;
+	}
+
+	if (itype.is_singleton) {
+		InternalCall singleton_icall = InternalCall(itype.api_type, ICALL_PREFIX + itype.name + SINGLETON_ICALL_SUFFIX, "IntPtr");
+
+		if (!find_icall_by_name(singleton_icall.name, custom_icalls))
+			custom_icalls.push_back(singleton_icall);
+	}
+
+	if (itype.is_instantiable) {
+		InternalCall ctor_icall = InternalCall(itype.api_type, ctor_method, "IntPtr", itype.proxy_name + " obj");
+
+		if (!find_icall_by_name(ctor_icall.name, custom_icalls))
+			custom_icalls.push_back(ctor_icall);
+	}
+
+	cs_file.push_back(INDENT1 CLOSE_BLOCK CLOSE_BLOCK);
+
+	return _save_file(p_output_file, cs_file);
+}
+
+Error BindingsGenerator::generate_glue(const String &p_output_dir) {
+
+	verbose_output = true;
+
+	bool dir_exists = DirAccess::exists(p_output_dir);
+	ERR_EXPLAIN("The output directory does not exist.");
+	ERR_FAIL_COND_V(!dir_exists, ERR_FILE_BAD_PATH);
+
+	List<String> cpp_file;
+
+	cpp_file.push_back("#include \"" GLUE_HEADER_FILE "\"\n"
+					   "\n");
+
+	List<const InternalCall *> generated_icall_funcs;
+
+	for (Map<String, TypeInterface>::Element *type_elem = obj_types.front(); type_elem; type_elem = type_elem->next()) {
+		const TypeInterface &itype = type_elem->get();
+
+		if (itype.base_name.length() && obj_types[itype.base_name].is_singleton && is_singleton_black_listed(itype.name))
+			continue;
+
+		List<InternalCall> &custom_icalls = itype.api_type == ClassDB::API_EDITOR ? editor_custom_icalls : core_custom_icalls;
+
+		OS::get_singleton()->print(String("Generating " + itype.name + "...\n").utf8());
+
+		String ctor_method(ICALL_PREFIX + itype.proxy_name + "_Ctor");
+
+		for (const List<MethodInterface>::Element *E = itype.methods.front(); E; E = E->next()) {
+			const MethodInterface &imethod = E->get();
+
+			if (imethod.is_virtual)
+				continue;
+
+			bool ret_void = imethod.return_type == "void";
+
+			const TypeInterface *return_type = _get_type_by_name_or_placeholder(imethod.return_type);
+
+			String argc_str = itos(imethod.arguments.size());
+
+			String c_func_sig = "MethodBind* " CS_PARAM_METHODBIND ", " + itype.c_type_in + " " CS_PARAM_INSTANCE;
+			String c_in_statements;
+			String c_args_var_content;
+
+			// Get arguments information
+			int i = 0;
+			for (const List<ArgumentInterface>::Element *F = imethod.arguments.front(); F; F = F->next()) {
+				const ArgumentInterface &iarg = F->get();
+				const TypeInterface *arg_type = _get_type_by_name_or_placeholder(iarg.type);
+
+				String c_param_name = "arg" + itos(i + 1);
+
+				if (imethod.is_vararg) {
+					if (i < imethod.arguments.size() - 1) {
+						c_in_statements += sformat(arg_type->c_in.size() ? arg_type->c_in : TypeInterface::DEFAULT_VARARG_C_IN, "Variant", c_param_name);
+						c_in_statements += "\t" C_LOCAL_PTRCALL_ARGS ".set(0, ";
+						c_in_statements += sformat("&%s_in", c_param_name);
+						c_in_statements += ");\n";
+					}
+				} else {
+					if (i > 0)
+						c_args_var_content += ", ";
+					if (arg_type->c_in.size())
+						c_in_statements += sformat(arg_type->c_in, arg_type->c_type, c_param_name);
+					c_args_var_content += sformat(arg_type->c_arg_in, c_param_name);
+				}
+
+				c_func_sig += ", ";
+				c_func_sig += arg_type->c_type_in;
+				c_func_sig += " ";
+				c_func_sig += c_param_name;
+
+				i++;
+			}
+
+			const Map<const MethodInterface *, const InternalCall *>::Element *match = method_icalls_map.find(&E->get());
+			ERR_FAIL_NULL_V(match, ERR_BUG);
+
+			const InternalCall *im_icall = match->value();
+			String icall_method = im_icall->name;
+
+			if (!generated_icall_funcs.find(im_icall)) {
+				generated_icall_funcs.push_back(im_icall);
+
+				if (im_icall->editor_only)
+					cpp_file.push_back("#ifdef TOOLS_ENABLED\n");
+
+				// Generate icall function
+
+				cpp_file.push_back(ret_void ? "void " : return_type->c_type_out + " ");
+				cpp_file.push_back(icall_method);
+				cpp_file.push_back("(");
+				cpp_file.push_back(c_func_sig);
+				cpp_file.push_back(") " OPEN_BLOCK);
+
+				String fail_ret = ret_void ? "" : ", " + (return_type->c_type_out.ends_with("*") ? "NULL" : return_type->c_type_out + "()");
+
+				if (!ret_void) {
+					String ptrcall_return_type;
+					String initialization;
+
+					if (return_type->is_object_type) {
+						ptrcall_return_type = return_type->is_reference ? "Ref<Reference>" : return_type->c_type;
+						initialization = return_type->is_reference ? "" : " = NULL";
+					} else {
+						ptrcall_return_type = return_type->c_type;
+					}
+
+					cpp_file.push_back("\t" + ptrcall_return_type);
+					cpp_file.push_back(" " LOCAL_RET);
+					cpp_file.push_back(initialization + ";\n");
+					cpp_file.push_back("\tERR_FAIL_NULL_V(" CS_PARAM_INSTANCE);
+					cpp_file.push_back(fail_ret);
+					cpp_file.push_back(");\n");
+				} else {
+					cpp_file.push_back("\tERR_FAIL_NULL(" CS_PARAM_INSTANCE ");\n");
+				}
+
+				if (imethod.arguments.size()) {
+					if (imethod.is_vararg) {
+						String err_fail_macro = ret_void ? "ERR_FAIL_COND" : "ERR_FAIL_COND_V";
+						String vararg_arg = "arg" + argc_str;
+						String real_argc_str = itos(imethod.arguments.size() - 1); // Arguments count without vararg
+
+						cpp_file.push_back("\tVector<Variant> varargs;\n"
+										   "\tint vararg_length = mono_array_length(");
+						cpp_file.push_back(vararg_arg);
+						cpp_file.push_back(");\n\tint total_length = ");
+						cpp_file.push_back(real_argc_str);
+						cpp_file.push_back(" + vararg_length;\n\t");
+						cpp_file.push_back(err_fail_macro);
+						cpp_file.push_back("(varargs.resize(vararg_length) != OK");
+						cpp_file.push_back(fail_ret);
+						cpp_file.push_back(");\n\tVector<Variant*> " C_LOCAL_PTRCALL_ARGS ";\n\t");
+						cpp_file.push_back(err_fail_macro);
+						cpp_file.push_back("(call_args.resize(total_length) != OK");
+						cpp_file.push_back(fail_ret);
+						cpp_file.push_back(");\n");
+						cpp_file.push_back(c_in_statements);
+						cpp_file.push_back("\tfor (int i = 0; i < vararg_length; i++) " OPEN_BLOCK
+										   "\t\tMonoObject* elem = mono_array_get(");
+						cpp_file.push_back(vararg_arg);
+						cpp_file.push_back(", MonoObject*, i);\n"
+										   "\t\tvarargs.set(i, GDMonoMarshal::mono_object_to_variant(elem));\n"
+										   "\t\t" C_LOCAL_PTRCALL_ARGS ".set(");
+						cpp_file.push_back(real_argc_str);
+						cpp_file.push_back(" + i, &varargs[i]);\n\t" CLOSE_BLOCK);
+					} else {
+						cpp_file.push_back(c_in_statements);
+						cpp_file.push_back("\tconst void* " C_LOCAL_PTRCALL_ARGS "[");
+						cpp_file.push_back(argc_str + "] = { ");
+						cpp_file.push_back(c_args_var_content + " };\n");
+					}
+				}
+
+				if (imethod.is_vararg) {
+					cpp_file.push_back("\tVariant::CallError vcall_error;\n\t");
+
+					if (!ret_void)
+						cpp_file.push_back(LOCAL_RET " = ");
+
+					cpp_file.push_back(CS_PARAM_METHODBIND "->call(" CS_PARAM_INSTANCE ", ");
+					cpp_file.push_back(imethod.arguments.size() ? "(const Variant**)" C_LOCAL_PTRCALL_ARGS ".ptr()" : "NULL");
+					cpp_file.push_back(", total_length, vcall_error);\n");
+				} else {
+					cpp_file.push_back("\t" CS_PARAM_METHODBIND "->ptrcall(" CS_PARAM_INSTANCE ", ");
+					cpp_file.push_back(imethod.arguments.size() ? C_LOCAL_PTRCALL_ARGS ", " : "NULL, ");
+					cpp_file.push_back(!ret_void ? "&" LOCAL_RET ");\n" : "NULL);\n");
+				}
+
+				if (!ret_void) {
+					if (return_type->c_out.empty())
+						cpp_file.push_back("\treturn " LOCAL_RET ";\n");
+					else
+						cpp_file.push_back(sformat(return_type->c_out, return_type->c_type_out, LOCAL_RET, return_type->name));
+				}
+
+				cpp_file.push_back(CLOSE_BLOCK "\n");
+
+				if (im_icall->editor_only)
+					cpp_file.push_back("#endif // TOOLS_ENABLED\n");
+			}
+		}
+
+		if (itype.is_singleton) {
+			String singleton_icall_name = ICALL_PREFIX + itype.name + SINGLETON_ICALL_SUFFIX;
+			InternalCall singleton_icall = InternalCall(itype.api_type, singleton_icall_name, "IntPtr");
+
+			if (!find_icall_by_name(singleton_icall.name, custom_icalls))
+				custom_icalls.push_back(singleton_icall);
+
+			cpp_file.push_back("Object* ");
+			cpp_file.push_back(singleton_icall_name);
+			cpp_file.push_back("() " OPEN_BLOCK "\treturn ProjectSettings::get_singleton()->get_singleton_object(\"");
+			cpp_file.push_back(itype.proxy_name);
+			cpp_file.push_back("\");\n" CLOSE_BLOCK "\n");
+		}
+
+		if (itype.is_instantiable) {
+			InternalCall ctor_icall = InternalCall(itype.api_type, ctor_method, "IntPtr", itype.proxy_name + " obj");
+
+			if (!find_icall_by_name(ctor_icall.name, custom_icalls))
+				custom_icalls.push_back(ctor_icall);
+
+			cpp_file.push_back("Object* ");
+			cpp_file.push_back(ctor_method);
+			cpp_file.push_back("(MonoObject* obj) " OPEN_BLOCK
+							   "\t" C_MACRO_OBJECT_CONSTRUCT "(instance, \"");
+			cpp_file.push_back(itype.name);
+			cpp_file.push_back("\");\n"
+							   "\t" C_METHOD_TIE_MANAGED_TO_UNMANAGED "(obj, instance);\n"
+							   "\treturn instance;\n" CLOSE_BLOCK "\n");
+		}
+	}
+
+	cpp_file.push_back("namespace GodotSharpBindings\n" OPEN_BLOCK);
+	cpp_file.push_back("uint64_t get_core_api_hash() { return ");
+	cpp_file.push_back(itos(GDMono::get_singleton()->get_api_core_hash()) + "; }\n");
+	cpp_file.push_back("#ifdef TOOLS_ENABLED\n"
+					   "uint64_t get_editor_api_hash() { return ");
+	cpp_file.push_back(itos(GDMono::get_singleton()->get_api_editor_hash()) +
+					   "; }\n#endif // TOOLS_ENABLED\n");
+	cpp_file.push_back("void register_generated_icalls() " OPEN_BLOCK);
+
+#define ADD_INTERNAL_CALL_REGISTRATION(m_icall)                                                       \
+	{                                                                                                 \
+		cpp_file.push_back("\tmono_add_internal_call(");                                              \
+		cpp_file.push_back("\"" BINDINGS_NAMESPACE ".");                                              \
+		cpp_file.push_back(m_icall.editor_only ? CS_CLASS_NATIVECALLS_EDITOR : CS_CLASS_NATIVECALLS); \
+		cpp_file.push_back("::");                                                                     \
+		cpp_file.push_back(m_icall.name);                                                             \
+		cpp_file.push_back("\", (void*)");                                                            \
+		cpp_file.push_back(m_icall.name);                                                             \
+		cpp_file.push_back(");\n");                                                                   \
+	}
+
+	bool tools_sequence = false;
+	for (const List<InternalCall>::Element *E = core_custom_icalls.front(); E; E = E->next()) {
+
+		if (tools_sequence) {
+			if (!E->get().editor_only) {
+				tools_sequence = false;
+				cpp_file.push_back("#endif\n");
+			}
+		} else {
+			if (E->get().editor_only) {
+				cpp_file.push_back("#ifdef TOOLS_ENABLED\n");
+				tools_sequence = true;
+			}
+		}
+
+		ADD_INTERNAL_CALL_REGISTRATION(E->get());
+	}
+
+	if (tools_sequence) {
+		tools_sequence = false;
+		cpp_file.push_back("#endif\n");
+	}
+
+	cpp_file.push_back("#ifdef TOOLS_ENABLED\n");
+	for (const List<InternalCall>::Element *E = editor_custom_icalls.front(); E; E = E->next())
+		ADD_INTERNAL_CALL_REGISTRATION(E->get());
+	cpp_file.push_back("#endif // TOOLS_ENABLED\n");
+
+	for (const List<InternalCall>::Element *E = method_icalls.front(); E; E = E->next()) {
+
+		if (tools_sequence) {
+			if (!E->get().editor_only) {
+				tools_sequence = false;
+				cpp_file.push_back("#endif\n");
+			}
+		} else {
+			if (E->get().editor_only) {
+				cpp_file.push_back("#ifdef TOOLS_ENABLED\n");
+				tools_sequence = true;
+			}
+		}
+
+		ADD_INTERNAL_CALL_REGISTRATION(E->get());
+	}
+
+	if (tools_sequence) {
+		tools_sequence = false;
+		cpp_file.push_back("#endif\n");
+	}
+
+#undef ADD_INTERNAL_CALL_REGISTRATION
+
+	cpp_file.push_back(CLOSE_BLOCK "}\n");
+
+	return _save_file(path_join(p_output_dir, "mono_glue.gen.cpp"), cpp_file);
+}
+
+Error BindingsGenerator::_save_file(const String &p_path, const List<String> &p_content) {
+
+	FileAccessRef file = FileAccess::open(p_path, FileAccess::WRITE);
+
+	ERR_FAIL_COND_V(!file, ERR_FILE_CANT_WRITE);
+
+	for (const List<String>::Element *E = p_content.front(); E; E = E->next()) {
+		file->store_string(E->get());
+	}
+
+	file->close();
+
+	return OK;
+}
+
+const BindingsGenerator::TypeInterface *BindingsGenerator::_get_type_by_name_or_null(const String &p_name) {
+
+	const Map<String, TypeInterface>::Element *match = builtin_types.find(p_name);
+
+	if (match)
+		return &match->get();
+
+	match = obj_types.find(p_name);
+
+	if (match)
+		return &match->get();
+
+	return NULL;
+}
+
+const BindingsGenerator::TypeInterface *BindingsGenerator::_get_type_by_name_or_placeholder(const String &p_name) {
+
+	const TypeInterface *found = _get_type_by_name_or_null(p_name);
+
+	if (found)
+		return found;
+
+	ERR_PRINTS(String() + "Type not found. Creating placeholder: " + p_name);
+
+	const Map<String, TypeInterface>::Element *match = placeholder_types.find(p_name);
+
+	if (match)
+		return &match->get();
+
+	TypeInterface placeholder;
+	TypeInterface::create_placeholder_type(placeholder, p_name);
+
+	return &placeholder_types.insert(placeholder.name, placeholder)->get();
+}
+
+void BindingsGenerator::_populate_object_type_interfaces() {
+
+	obj_types.clear();
+
+	List<StringName> class_list;
+	ClassDB::get_class_list(&class_list);
+	class_list.sort_custom<StringName::AlphCompare>();
+
+	StringName refclass_name = String("Reference");
+
+	while (class_list.size()) {
+		StringName type_cname = class_list.front()->get();
+
+		ClassDB::APIType api_type = ClassDB::get_api_type(type_cname);
+
+		if (api_type == ClassDB::API_NONE) {
+			class_list.pop_front();
+			continue;
+		}
+
+		TypeInterface itype = TypeInterface::create_object_type(type_cname, api_type);
+
+		itype.base_name = ClassDB::get_parent_class(type_cname);
+		itype.is_singleton = ProjectSettings::get_singleton()->has_singleton(itype.proxy_name);
+		itype.is_instantiable = ClassDB::can_instance(type_cname) && !itype.is_singleton;
+		itype.is_reference = ClassDB::is_parent_class(type_cname, refclass_name);
+		itype.memory_own = itype.is_reference;
+
+		itype.c_out = "\treturn ";
+		itype.c_out += C_METHOD_UNMANAGED_GET_MANAGED;
+		itype.c_out += itype.is_reference ? "(%1.ptr());\n" : "(%1);\n";
+
+		itype.cs_in = itype.is_singleton ? BINDINGS_PTR_FIELD : "Object." CS_SMETHOD_GETINSTANCE "(%0)";
+
+		itype.c_type = "Object*";
+		itype.c_type_in = itype.c_type;
+		itype.c_type_out = "MonoObject*";
+		itype.cs_type = itype.proxy_name;
+		itype.im_type_in = "IntPtr";
+		itype.im_type_out = itype.proxy_name;
+
+		List<MethodInfo> virtual_method_list;
+		ClassDB::get_virtual_methods(type_cname, &virtual_method_list, true);
+
+		List<MethodInfo> method_list;
+		ClassDB::get_method_list(type_cname, &method_list, true);
+		method_list.sort();
+
+		for (List<MethodInfo>::Element *E = method_list.front(); E; E = E->next()) {
+			const MethodInfo &method_info = E->get();
+
+			int argc = method_info.arguments.size();
+
+			if (method_info.name.empty())
+				continue;
+
+			MethodInterface imethod;
+			imethod.name = method_info.name;
+
+			if (method_info.flags & METHOD_FLAG_VIRTUAL)
+				imethod.is_virtual = true;
+
+			PropertyInfo return_info = method_info.return_val;
+
+			MethodBind *m = imethod.is_virtual ? NULL : ClassDB::get_method(type_cname, method_info.name);
+
+			imethod.is_vararg = m && m->is_vararg();
+
+			if (!m && !imethod.is_virtual) {
+				if (virtual_method_list.find(method_info)) {
+					// A virtual method without the virtual flag. This is a special case.
+
+					// This type of method can only be found in Object derived types.
+					ERR_FAIL_COND(!itype.is_object_type);
+
+					// There is no method bind, so let's fallback to Godot's object.Call(string, params)
+					imethod.requires_object_call = true;
+
+					// The method Object.free is registered as a virtual method, but without the virtual flag.
+					// This is because this method is not supposed to be overridden, but called.
+					// We assume the return type is void.
+					imethod.return_type = "void";
+
+					// Actually, more methods like this may be added in the future,
+					// which could actually will return something differnet.
+					// Let's put this to notify us if that ever happens.
+					if (itype.name != "Object" || imethod.name != "free") {
+						WARN_PRINTS("Notification: New unexpected virtual non-overridable method found.\n"
+									"We only expected Object.free, but found " +
+									itype.name + "." + imethod.name);
+					}
+				} else {
+					ERR_PRINTS("Missing MethodBind for non-virtual method: " + itype.name + "." + imethod.name);
+				}
+			} else if (return_info.type == Variant::INT && return_info.usage & PROPERTY_USAGE_CLASS_IS_ENUM) {
+				//imethod.return_type = return_info.class_name;
+				imethod.return_type = "int";
+			} else if (return_info.class_name != StringName()) {
+				imethod.return_type = return_info.class_name;
+			} else if (return_info.hint == PROPERTY_HINT_RESOURCE_TYPE) {
+				imethod.return_type = return_info.hint_string;
+			} else if (return_info.type == Variant::NIL && return_info.usage & PROPERTY_USAGE_NIL_IS_VARIANT) {
+				imethod.return_type = "Variant";
+			} else if (return_info.type == Variant::NIL) {
+				imethod.return_type = "void";
+			} else {
+				imethod.return_type = Variant::get_type_name(return_info.type);
+			}
+
+			if (!itype.requires_collections && imethod.return_type == "Dictionary")
+				itype.requires_collections = true;
+
+			for (int i = 0; i < argc; i++) {
+				PropertyInfo arginfo = method_info.arguments[i];
+
+				ArgumentInterface iarg;
+				iarg.name = arginfo.name;
+
+				if (arginfo.type == Variant::INT && arginfo.usage & PROPERTY_USAGE_CLASS_IS_ENUM) {
+					//iarg.type = arginfo.class_name;
+					iarg.type = "int";
+				} else if (arginfo.class_name != StringName()) {
+					iarg.type = arginfo.class_name;
+				} else if (arginfo.hint == PROPERTY_HINT_RESOURCE_TYPE) {
+					iarg.type = arginfo.hint_string;
+				} else if (arginfo.type == Variant::NIL) {
+					iarg.type = "Variant";
+				} else {
+					iarg.type = Variant::get_type_name(arginfo.type);
+				}
+
+				iarg.name = escape_csharp_keyword(snake_to_camel_case(iarg.name));
+
+				if (!itype.requires_collections && iarg.type == "Dictionary")
+					itype.requires_collections = true;
+
+				if (m && m->has_default_argument(i)) {
+					_default_argument_from_variant(m->get_default_argument(i), iarg);
+				}
+
+				imethod.add_argument(iarg);
+			}
+
+			if (imethod.is_vararg) {
+				ArgumentInterface ivararg;
+				ivararg.type = "VarArg";
+				ivararg.name = "@args";
+				imethod.add_argument(ivararg);
+			}
+
+			imethod.proxy_name = escape_csharp_keyword(snake_to_pascal_case(imethod.name));
+
+			// Prevent naming the property and its enclosing type from sharing the same name
+			if (imethod.proxy_name == itype.proxy_name) {
+				if (verbose_output) {
+					WARN_PRINTS("Name of method `" + imethod.proxy_name + "` is ambiguous with the name of its class `" +
+								itype.proxy_name + "`. Renaming method to `" + imethod.proxy_name + "_`");
+				}
+
+				imethod.proxy_name += "_";
+			}
+
+			if (itype.class_doc) {
+				for (int i = 0; i < itype.class_doc->methods.size(); i++) {
+					if (itype.class_doc->methods[i].name == imethod.name) {
+						imethod.method_doc = &itype.class_doc->methods[i];
+						break;
+					}
+				}
+			}
+
+			if (!imethod.is_virtual && imethod.name[0] == '_') {
+				const Vector<DocData::PropertyDoc> &properties = itype.class_doc->properties;
+
+				for (int i = 0; i < properties.size(); i++) {
+					const DocData::PropertyDoc &prop_doc = properties[i];
+
+					if (prop_doc.getter == imethod.name || prop_doc.setter == imethod.name) {
+						imethod.is_internal = true;
+						itype.methods.push_back(imethod);
+						break;
+					}
+				}
+			} else {
+				itype.methods.push_back(imethod);
+			}
+		}
+
+		obj_types.insert(itype.name, itype);
+
+		class_list.pop_front();
+	}
+}
+
+void BindingsGenerator::_default_argument_from_variant(const Variant &p_val, ArgumentInterface &r_iarg) {
+
+	r_iarg.default_argument = p_val;
+
+	switch (p_val.get_type()) {
+		case Variant::NIL:
+			if (ClassDB::class_exists(r_iarg.type)) {
+				// Object type
+				r_iarg.default_argument = "null";
+			} else {
+				// Variant
+				r_iarg.default_argument = "null";
+			}
+			break;
+		// Atomic types
+		case Variant::BOOL:
+			r_iarg.default_argument = bool(p_val) ? "true" : "false";
+			break;
+		case Variant::INT:
+			break; // Keep it
+		case Variant::REAL:
+#ifndef REAL_T_IS_DOUBLE
+			r_iarg.default_argument += "f";
+#endif
+			break;
+		case Variant::STRING:
+		case Variant::NODE_PATH:
+			r_iarg.default_argument = "\"" + r_iarg.default_argument + "\"";
+			break;
+		case Variant::TRANSFORM:
+			if (p_val.operator Transform() == Transform())
+				r_iarg.default_argument.clear();
+			r_iarg.default_argument = "new %s(" + r_iarg.default_argument + ")";
+			r_iarg.def_param_mode = ArgumentInterface::NULLABLE_VAL;
+			break;
+		case Variant::PLANE:
+		case Variant::RECT3:
+		case Variant::COLOR:
+			r_iarg.default_argument = "new Color(1, 1, 1, 1)";
+			r_iarg.def_param_mode = ArgumentInterface::NULLABLE_VAL;
+			break;
+		case Variant::VECTOR2:
+		case Variant::RECT2:
+		case Variant::VECTOR3:
+			r_iarg.default_argument = "new %s" + r_iarg.default_argument;
+			r_iarg.def_param_mode = ArgumentInterface::NULLABLE_VAL;
+			break;
+		case Variant::OBJECT:
+			if (p_val.is_zero()) {
+				r_iarg.default_argument = "null";
+				break;
+			}
+		case Variant::DICTIONARY:
+		case Variant::_RID:
+			r_iarg.default_argument = "new %s()";
+			r_iarg.def_param_mode = ArgumentInterface::NULLABLE_REF;
+			break;
+		case Variant::ARRAY:
+		case Variant::POOL_BYTE_ARRAY:
+		case Variant::POOL_INT_ARRAY:
+		case Variant::POOL_REAL_ARRAY:
+		case Variant::POOL_STRING_ARRAY:
+		case Variant::POOL_VECTOR2_ARRAY:
+		case Variant::POOL_VECTOR3_ARRAY:
+		case Variant::POOL_COLOR_ARRAY:
+			r_iarg.default_argument = "new %s {}";
+			r_iarg.def_param_mode = ArgumentInterface::NULLABLE_REF;
+			break;
+		case Variant::TRANSFORM2D:
+		case Variant::BASIS:
+		case Variant::QUAT:
+			r_iarg.default_argument = Variant::get_type_name(p_val.get_type()) + ".Identity";
+			r_iarg.def_param_mode = ArgumentInterface::NULLABLE_VAL;
+			break;
+		default: {}
+	}
+
+	if (r_iarg.def_param_mode == ArgumentInterface::CONSTANT && r_iarg.type == "Variant" && r_iarg.default_argument != "null")
+		r_iarg.def_param_mode = ArgumentInterface::NULLABLE_REF;
+}
+
+void BindingsGenerator::_populate_builtin_type_interfaces() {
+
+	builtin_types.clear();
+
+	TypeInterface itype;
+
+#define INSERT_STRUCT_TYPE(m_type, m_type_in)                                                         \
+	{                                                                                                 \
+		itype = TypeInterface::create_value_type(#m_type);                                            \
+		itype.c_in = "\tMARSHALLED_IN(" #m_type ", %1, %1_in);\n";                                    \
+		itype.c_out = "\tMARSHALLED_OUT(" #m_type ", %1, ret_out)\n"                                  \
+					  "\treturn mono_value_box(mono_domain_get(), CACHED_CLASS_RAW(%2), ret_out);\n"; \
+		itype.c_arg_in = "&%s_in";                                                                    \
+		itype.c_type_in = m_type_in;                                                                  \
+		itype.cs_in = "ref %s";                                                                       \
+		itype.cs_out = "return (" #m_type ")%0;";                                                     \
+		itype.im_type_out = "object";                                                                 \
+		builtin_types.insert(#m_type, itype);                                                         \
+	}
+
+	INSERT_STRUCT_TYPE(Vector2, "real_t*")
+	INSERT_STRUCT_TYPE(Rect2, "real_t*")
+	INSERT_STRUCT_TYPE(Transform2D, "real_t*")
+	INSERT_STRUCT_TYPE(Vector3, "real_t*")
+	INSERT_STRUCT_TYPE(Basis, "real_t*")
+	INSERT_STRUCT_TYPE(Quat, "real_t*")
+	INSERT_STRUCT_TYPE(Transform, "real_t*")
+	INSERT_STRUCT_TYPE(Rect3, "real_t*")
+	INSERT_STRUCT_TYPE(Color, "real_t*")
+	INSERT_STRUCT_TYPE(Plane, "real_t*")
+
+#undef INSERT_STRUCT_TYPE
+
+#define INSERT_PRIMITIVE_TYPE(m_type)                      \
+	{                                                      \
+		itype = TypeInterface::create_value_type(#m_type); \
+		itype.c_arg_in = "&%s";                            \
+		itype.c_type_in = #m_type;                         \
+		itype.c_type_out = #m_type;                        \
+		itype.im_type_in = #m_type;                        \
+		itype.im_type_out = #m_type;                       \
+		builtin_types.insert(#m_type, itype);              \
+	}
+
+	INSERT_PRIMITIVE_TYPE(bool)
+	//INSERT_PRIMITIVE_TYPE(int)
+
+	// int
+	itype = TypeInterface::create_value_type("int");
+	itype.c_arg_in = "&%s_in";
+	//* ptrcall only supports int64_t and uint64_t
+	itype.c_in = "\t%0 %1_in = (%0)%1;\n";
+	itype.c_out = "\treturn (%0)%1;\n";
+	itype.c_type = "int64_t";
+	//*/
+	itype.c_type_in = itype.name;
+	itype.c_type_out = itype.name;
+	itype.im_type_in = itype.name;
+	itype.im_type_out = itype.name;
+	builtin_types.insert(itype.name, itype);
+
+#undef INSERT_PRIMITIVE_TYPE
+
+	// real_t
+	itype = TypeInterface();
+#ifdef REAL_T_IS_DOUBLE
+	itype.name = "double";
+#else
+	itype.name = "float";
+#endif
+	itype.proxy_name = itype.name;
+	itype.c_arg_in = "&%s_in";
+	//* ptrcall only supports double
+	itype.c_in = "\t%0 %1_in = (%0)%1;\n";
+	itype.c_out = "\treturn (%0)%1;\n";
+	itype.c_type = "double";
+	//*/
+	itype.c_type_in = "real_t";
+	itype.c_type_out = "real_t";
+	itype.cs_type = itype.proxy_name;
+	itype.im_type_in = itype.proxy_name;
+	itype.im_type_out = itype.proxy_name;
+	builtin_types.insert(itype.name, itype);
+
+	// String
+	itype = TypeInterface();
+	itype.name = "String";
+	itype.proxy_name = "string";
+	itype.c_in = "\t%0 %1_in = " C_METHOD_MONOSTR_TO_GODOT "(%1);\n";
+	itype.c_out = "\treturn " C_METHOD_MONOSTR_FROM_GODOT "(%1);\n";
+	itype.c_arg_in = "&%s_in";
+	itype.c_type = itype.name;
+	itype.c_type_in = "MonoString*";
+	itype.c_type_out = "MonoString*";
+	itype.cs_type = itype.proxy_name;
+	itype.im_type_in = itype.proxy_name;
+	itype.im_type_out = itype.proxy_name;
+	builtin_types.insert(itype.name, itype);
+
+	// NodePath
+	itype = TypeInterface();
+	itype.name = "NodePath";
+	itype.proxy_name = "NodePath";
+	itype.c_out = "\treturn memnew(NodePath(%1));\n";
+	itype.c_type = itype.name;
+	itype.c_type_in = itype.c_type + "*";
+	itype.c_type_out = itype.c_type + "*";
+	itype.cs_type = itype.proxy_name;
+	itype.cs_in = "NodePath." CS_SMETHOD_GETINSTANCE "(%0)";
+	itype.cs_out = "return new NodePath(%0);";
+	itype.im_type_in = "IntPtr";
+	itype.im_type_out = "IntPtr";
+	_populate_builtin_type(itype, Variant::NODE_PATH);
+	extra_members.insert(itype.name, MEMBER_BEGIN "public NodePath() : this(string.Empty) {}\n" MEMBER_BEGIN "public NodePath(string path)\n" OPEN_BLOCK_L2
+												  "this." BINDINGS_PTR_FIELD " = NativeCalls.godot_icall_NodePath_Ctor(path);\n" CLOSE_BLOCK_L2
+														  MEMBER_BEGIN "public static implicit operator NodePath(string from)\n" OPEN_BLOCK_L2 "return new NodePath(from);\n" CLOSE_BLOCK_L2
+																  MEMBER_BEGIN "public static implicit operator string(NodePath from)\n" OPEN_BLOCK_L2
+												  "return NativeCalls." ICALL_PREFIX "NodePath_operator_String(NodePath." CS_SMETHOD_GETINSTANCE "(from));\n" CLOSE_BLOCK_L2);
+	builtin_types.insert(itype.name, itype);
+
+	// RID
+	itype = TypeInterface();
+	itype.name = "RID";
+	itype.proxy_name = "RID";
+	itype.c_out = "\treturn memnew(RID(%1));\n";
+	itype.c_type = itype.name;
+	itype.c_type_in = itype.c_type + "*";
+	itype.c_type_out = itype.c_type + "*";
+	itype.cs_type = itype.proxy_name;
+	itype.cs_in = "RID." CS_SMETHOD_GETINSTANCE "(%0)";
+	itype.cs_out = "return new RID(%0);";
+	itype.im_type_in = "IntPtr";
+	itype.im_type_out = "IntPtr";
+	_populate_builtin_type(itype, Variant::_RID);
+	extra_members.insert(itype.name, MEMBER_BEGIN "internal RID()\n" OPEN_BLOCK_L2
+												  "this." BINDINGS_PTR_FIELD " = IntPtr.Zero;\n" CLOSE_BLOCK_L2);
+	builtin_types.insert(itype.name, itype);
+
+	// Variant
+	itype = TypeInterface();
+	itype.name = "Variant";
+	itype.proxy_name = "object";
+	itype.c_in = "\t%0 %1_in = " C_METHOD_MANAGED_TO_VARIANT "(%1);\n";
+	itype.c_out = "\treturn " C_METHOD_MANAGED_FROM_VARIANT "(%1);\n";
+	itype.c_arg_in = "&%s_in";
+	itype.c_type = itype.name;
+	itype.c_type_in = "MonoObject*";
+	itype.c_type_out = "MonoObject*";
+	itype.cs_type = itype.proxy_name;
+	itype.im_type_in = "object";
+	itype.im_type_out = itype.proxy_name;
+	builtin_types.insert(itype.name, itype);
+
+	// VarArg (fictitious type to represent variable arguments)
+	itype = TypeInterface();
+	itype.name = "VarArg";
+	itype.proxy_name = "object[]";
+	itype.c_in = "\t%0 %1_in = " C_METHOD_MONOARRAY_TO(Array) "(%1);\n";
+	itype.c_arg_in = "&%s_in";
+	itype.c_type = "Array";
+	itype.c_type_in = "MonoArray*";
+	itype.cs_type = "params object[]";
+	itype.im_type_in = "object[]";
+	builtin_types.insert(itype.name, itype);
+
+#define INSERT_ARRAY_FULL(m_name, m_type, m_proxy_t)                          \
+	{                                                                         \
+		itype = TypeInterface();                                              \
+		itype.name = #m_name;                                                 \
+		itype.proxy_name = #m_proxy_t "[]";                                   \
+		itype.c_in = "\t%0 %1_in = " C_METHOD_MONOARRAY_TO(m_type) "(%1);\n"; \
+		itype.c_out = "\treturn " C_METHOD_MONOARRAY_FROM(m_type) "(%1);\n";  \
+		itype.c_arg_in = "&%s_in";                                            \
+		itype.c_type = #m_type;                                               \
+		itype.c_type_in = "MonoArray*";                                       \
+		itype.c_type_out = "MonoArray*";                                      \
+		itype.cs_type = itype.proxy_name;                                     \
+		itype.im_type_in = itype.proxy_name;                                  \
+		itype.im_type_out = itype.proxy_name;                                 \
+		builtin_types.insert(itype.name, itype);                              \
+	}
+
+#define INSERT_ARRAY(m_type, m_proxy_t) INSERT_ARRAY_FULL(m_type, m_type, m_proxy_t)
+
+	INSERT_ARRAY(Array, object);
+	INSERT_ARRAY(PoolIntArray, int);
+	INSERT_ARRAY_FULL(PoolByteArray, PoolByteArray, byte);
+
+#ifdef REAL_T_IS_DOUBLE
+	INSERT_ARRAY(PoolRealArray, double);
+#else
+	INSERT_ARRAY(PoolRealArray, float);
+#endif
+
+	INSERT_ARRAY(PoolStringArray, string);
+
+	INSERT_ARRAY(PoolColorArray, Color);
+	INSERT_ARRAY(PoolVector2Array, Vector2);
+	INSERT_ARRAY(PoolVector3Array, Vector3);
+
+#undef INSERT_ARRAY
+
+	// Dictionary
+	itype = TypeInterface();
+	itype.name = "Dictionary";
+	itype.proxy_name = "Dictionary<object, object>";
+	itype.c_in = "\t%0 %1_in = " C_METHOD_MANAGED_TO_DICT "(%1);\n";
+	itype.c_out = "\treturn " C_METHOD_MANAGED_FROM_DICT "(%1);\n";
+	itype.c_arg_in = "&%s_in";
+	itype.c_type = itype.name;
+	itype.c_type_in = "MonoObject*";
+	itype.c_type_out = "MonoObject*";
+	itype.cs_type = itype.proxy_name;
+	itype.im_type_in = itype.proxy_name;
+	itype.im_type_out = itype.proxy_name;
+	builtin_types.insert(itype.name, itype);
+
+	// void (fictitious type to represent the return type of methods that do not return anything)
+	itype = TypeInterface();
+	itype.name = "void";
+	itype.proxy_name = itype.name;
+	itype.c_type = itype.name;
+	itype.c_type_in = itype.c_type;
+	itype.c_type_out = itype.c_type;
+	itype.cs_type = itype.proxy_name;
+	itype.im_type_in = itype.proxy_name;
+	itype.im_type_out = itype.proxy_name;
+	builtin_types.insert(itype.name, itype);
+
+	// Error
+	itype = TypeInterface();
+	itype.name = "Error";
+	itype.proxy_name = "Error";
+	itype.c_type = itype.name;
+	itype.c_type_in = itype.c_type;
+	itype.c_type_out = itype.c_type;
+	itype.cs_type = itype.proxy_name;
+	itype.cs_in = "(int)%0";
+	itype.cs_out = "return (Error)%s;";
+	itype.im_type_in = "int";
+	itype.im_type_out = "int";
+	builtin_types.insert(itype.name, itype);
+}
+
+void BindingsGenerator::_populate_builtin_type(TypeInterface &r_itype, Variant::Type vtype) {
+
+	Variant::CallError cerror;
+	Variant v = Variant::construct(vtype, NULL, 0, cerror);
+
+	List<MethodInfo> method_list;
+	v.get_method_list(&method_list);
+	method_list.sort();
+
+	for (List<MethodInfo>::Element *E = method_list.front(); E; E = E->next()) {
+		MethodInfo &mi = E->get();
+		MethodInterface imethod;
+
+		imethod.name = mi.name;
+		imethod.proxy_name = mi.name;
+
+		for (int i = 0; i < mi.arguments.size(); i++) {
+			ArgumentInterface iarg;
+			PropertyInfo pi = mi.arguments[i];
+
+			iarg.name = pi.name;
+
+			if (pi.type == Variant::NIL)
+				iarg.type = "Variant";
+			else
+				iarg.type = Variant::get_type_name(pi.type);
+
+			if (!r_itype.requires_collections && iarg.type == "Dictionary")
+				r_itype.requires_collections = true;
+
+			if ((mi.default_arguments.size() - mi.arguments.size() + i) >= 0)
+				_default_argument_from_variant(Variant::construct(pi.type, NULL, 0, cerror), iarg);
+
+			imethod.add_argument(iarg);
+		}
+
+		if (mi.return_val.type == Variant::NIL) {
+			if (mi.return_val.name != "")
+				imethod.return_type = "Variant";
+		} else {
+			imethod.return_type = Variant::get_type_name(mi.return_val.type);
+		}
+
+		if (!r_itype.requires_collections && imethod.return_type == "Dictionary")
+			r_itype.requires_collections = true;
+
+		if (r_itype.class_doc) {
+			for (int i = 0; i < r_itype.class_doc->methods.size(); i++) {
+				if (r_itype.class_doc->methods[i].name == imethod.name) {
+					imethod.method_doc = &r_itype.class_doc->methods[i];
+					break;
+				}
+			}
+		}
+
+		r_itype.methods.push_back(imethod);
+	}
+}
+
+BindingsGenerator::BindingsGenerator() {
+
+	EditorHelp::generate_doc();
+
+	_populate_object_type_interfaces();
+	_populate_builtin_type_interfaces();
+	_generate_header_icalls();
+
+	for (Map<String, TypeInterface>::Element *E = obj_types.front(); E; E = E->next())
+		_generate_method_icalls(E->get());
+
+	_generate_method_icalls(builtin_types["NodePath"]);
+	_generate_method_icalls(builtin_types["RID"]);
+}
+
+void BindingsGenerator::handle_cmdline_args(const List<String> &p_cmdline_args) {
+
+	int options_count = 3;
+
+	String mono_glue_option = "--generate-mono-glue";
+	String cs_core_api_option = "--generate-cs-core-api";
+	String cs_editor_api_option = "--generate-cs-editor-api";
+
+	verbose_output = true;
+
+	const List<String>::Element *elem = p_cmdline_args.front();
+
+	while (elem && options_count) {
+
+		if (elem->get() == mono_glue_option) {
+
+			const List<String>::Element *path_elem = elem->next();
+
+			if (path_elem) {
+				get_singleton().generate_glue(path_elem->get());
+				elem = elem->next();
+			} else {
+				ERR_PRINTS("--generate-mono-glue: No output directory specified");
+			}
+
+			--options_count;
+
+		} else if (elem->get() == cs_core_api_option) {
+
+			const List<String>::Element *path_elem = elem->next();
+
+			if (path_elem) {
+				get_singleton().generate_cs_core_project(path_elem->get());
+				elem = elem->next();
+			} else {
+				ERR_PRINTS(cs_core_api_option + ": No output directory specified");
+			}
+
+			--options_count;
+
+		} else if (elem->get() == cs_editor_api_option) {
+
+			const List<String>::Element *path_elem = elem->next();
+
+			if (path_elem) {
+				if (path_elem->next()) {
+					get_singleton().generate_cs_editor_project(path_elem->get(), path_elem->next()->get());
+					elem = path_elem->next();
+				} else {
+					ERR_PRINTS(cs_editor_api_option + ": No hint path for the Core API dll specified");
+				}
+			} else {
+				ERR_PRINTS(cs_editor_api_option + ": No output directory specified");
+			}
+
+			--options_count;
+		}
+
+		elem = elem->next();
+	}
+
+	verbose_output = false;
+}
+
+#endif
diff --git a/modules/mono/editor/bindings_generator.h b/modules/mono/editor/bindings_generator.h
new file mode 100644
index 00000000000..437a566556d
--- /dev/null
+++ b/modules/mono/editor/bindings_generator.h
@@ -0,0 +1,429 @@
+/*************************************************************************/
+/*  bindings_generator.h                                                 */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2017 Godot Engine contributors (cf. AUTHORS.md)    */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+#ifndef BINDINGS_GENERATOR_H
+#define BINDINGS_GENERATOR_H
+
+#include "class_db.h"
+#include "editor/doc/doc_data.h"
+#include "editor/editor_help.h"
+
+#ifdef DEBUG_METHODS_ENABLED
+
+#include "ustring.h"
+
+class BindingsGenerator {
+	struct ArgumentInterface {
+		enum DefaultParamMode {
+			CONSTANT,
+			NULLABLE_VAL,
+			NULLABLE_REF
+		};
+
+		String type;
+		String name;
+		String default_argument;
+		DefaultParamMode def_param_mode;
+
+		ArgumentInterface() {
+			def_param_mode = CONSTANT;
+		}
+	};
+
+	struct MethodInterface {
+		String name;
+
+		/**
+		 * Name of the C# method
+		 */
+		String proxy_name;
+
+		/**
+		 * [TypeInterface::name] of the return type
+		 */
+		String return_type;
+
+		/**
+		 * Determines if the method has a variable number of arguments (VarArg)
+		 */
+		bool is_vararg;
+
+		/**
+		 * Virtual methods ("virtual" as defined by the Godot API) are methods that by default do nothing,
+		 * but can be overridden by the user to add custom functionality.
+		 * e.g.: _ready, _process, etc.
+		 */
+		bool is_virtual;
+
+		/**
+		 * Determines if the call should fallback to Godot's object.Call(string, params) in C#.
+		 */
+		bool requires_object_call;
+
+		/**
+		 * Determines if the method visibility is `internal` (visible only to files in the same assembly).
+		 * Currently, we only use this for methods that are not meant to be exposed,
+		 * but are required by properties as getters or setters.
+		 * Methods that are not meant to be exposed are those that begin with underscore and are not virtual.
+		 */
+		bool is_internal;
+
+		List<ArgumentInterface> arguments;
+
+		const DocData::MethodDoc *method_doc;
+
+		void add_argument(const ArgumentInterface &argument) {
+			arguments.push_back(argument);
+		}
+
+		MethodInterface() {
+			return_type = "void";
+			is_vararg = false;
+			is_virtual = false;
+			requires_object_call = false;
+			is_internal = false;
+			method_doc = NULL;
+		}
+	};
+
+	struct TypeInterface {
+		/**
+		 * Identifier name for this type.
+		 * Also used to format [c_out].
+		 */
+		String name;
+
+		/**
+		 * Identifier name of the base class.
+		 */
+		String base_name;
+
+		/**
+		 * Name of the C# class
+		 */
+		String proxy_name;
+
+		ClassDB::APIType api_type;
+
+		bool is_object_type;
+		bool is_singleton;
+		bool is_reference;
+
+		/**
+		 * Used only by Object-derived types.
+		 * Determines if this type is not virtual (incomplete).
+		 * e.g.: CanvasItem cannot be instantiated.
+		 */
+		bool is_instantiable;
+
+		/**
+		 * Used only by Object-derived types.
+		 * Determines if the C# class owns the native handle and must free it somehow when disposed.
+		 * e.g.: Reference types must notify when the C# instance is disposed, for proper refcounting.
+		 */
+		bool memory_own;
+
+		/**
+		 * Determines if the file must have a using directive for System.Collections.Generic
+		 * e.g.: When the generated class makes use of Dictionary
+		 */
+		bool requires_collections;
+
+		// !! The comments of the following fields make reference to other fields via square brackets, e.g.: [field_name]
+		// !! When renaming those fields, make sure to rename their references in the comments
+
+		// --- C INTERFACE ---
+
+		static const char *DEFAULT_VARARG_C_IN;
+
+		/**
+		 * One or more statements that manipulate the parameter before being passed as argument of a ptrcall.
+		 * If the statement adds a local that must be passed as the argument instead of the parameter,
+		 * the name of that local must be specified with [c_arg_in].
+		 * For variadic methods, this field is required and, if empty, [DEFAULT_VARARG_C_IN] is used instead.
+		 * Formatting elements:
+		 * %0: [c_type] of the parameter
+		 * %1: name of the parameter
+		 */
+		String c_in;
+
+		/**
+		 * Determines the name of the variable that will be passed as argument to a ptrcall.
+		 * By default the value equals the name of the parameter,
+		 * this varies for types that require special manipulation via [c_in].
+		 * Formatting elements:
+		 * %0 or %s: name of the parameter
+		 */
+		String c_arg_in;
+
+		/**
+		 * One or more statements that determine how a variable of this type is returned from a function.
+		 * It must contain the return statement(s).
+		 * Formatting elements:
+		 * %0: [c_type_out] of the return type
+		 * %1: name of the variable to be returned
+		 * %2: [name] of the return type
+		 */
+		String c_out;
+
+		/**
+		 * The actual expected type, as seen (in most cases) in Variant copy constructors
+		 * Used for the type of the return variable and to format [c_in].
+		 * The value must be the following depending of the type:
+		 * Object-derived types: Object*
+		 * Other types: [name]
+		 * -- Exceptions --
+		 * VarArg (fictitious type to represent variable arguments): Array
+		 * float: double (because ptrcall only supports double)
+		 * int: int64_t (because ptrcall only supports int64_t and uint64_t)
+		 * Reference types override this for the type of the return variable: Ref<Reference>
+		 */
+		String c_type;
+
+		/**
+		 * Determines the type used for parameters in function signatures.
+		 */
+		String c_type_in;
+
+		/**
+		 * Determines the return type used for function signatures.
+		 * Also used to construct a default value to return in case of errors,
+		 * and to format [c_out].
+		 */
+		String c_type_out;
+
+		// --- C# INTERFACE ---
+
+		/**
+		 * An expression that overrides the way the parameter is passed to the internal call.
+		 * If empty, the parameter is passed as is.
+		 * Formatting elements:
+		 * %0 or %s: name of the parameter
+		 */
+		String cs_in;
+
+		/**
+		 * One or more statements that determine how a variable of this type is returned from a method.
+		 * It must contain the return statement(s).
+		 * Formatting elements:
+		 * %0 or %s: name of the variable to be returned
+		 */
+		String cs_out;
+
+		/**
+		 * Type used for method signatures, both for parameters and the return type.
+		 * Same as [proxy_name] except for variable arguments (VarArg).
+		 */
+		String cs_type;
+
+		/**
+		 * Type used for parameters of internal call methods.
+		 */
+		String im_type_in;
+
+		/**
+		 * Type used for the return type of internal call methods.
+		 * If [cs_out] is not empty and the method return type is not void,
+		 * it is also used for the type of the return variable.
+		 */
+		String im_type_out;
+
+		const DocData::ClassDoc *class_doc;
+
+		List<MethodInterface> methods;
+
+		const MethodInterface *find_method_by_name(const String &p_name) const {
+
+			for (const List<MethodInterface>::Element *E = methods.front(); E; E = E->next()) {
+				if (E->get().name == p_name)
+					return &E->get();
+			}
+
+			return NULL;
+		}
+
+		static TypeInterface create_value_type(const String &p_name) {
+			TypeInterface itype;
+
+			itype.name = p_name;
+			itype.proxy_name = p_name;
+
+			itype.c_type = itype.name;
+			itype.c_type_in = "void*";
+			itype.c_type_out = "MonoObject*";
+			itype.cs_type = itype.proxy_name;
+			itype.im_type_in = "ref " + itype.proxy_name;
+			itype.im_type_out = itype.proxy_name;
+			itype.class_doc = &EditorHelp::get_doc_data()->class_list[itype.proxy_name];
+
+			return itype;
+		}
+
+		static TypeInterface create_object_type(const String &p_name, ClassDB::APIType p_api_type) {
+			TypeInterface itype;
+
+			itype.name = p_name;
+			itype.proxy_name = p_name.begins_with("_") ? p_name.substr(1, p_name.length()) : p_name;
+			itype.api_type = p_api_type;
+			itype.is_object_type = true;
+			itype.class_doc = &EditorHelp::get_doc_data()->class_list[itype.proxy_name];
+
+			return itype;
+		}
+
+		static void create_placeholder_type(TypeInterface &r_itype, const String &p_name) {
+			r_itype.name = p_name;
+			r_itype.proxy_name = p_name;
+
+			r_itype.c_type = r_itype.name;
+			r_itype.c_type_in = "MonoObject*";
+			r_itype.c_type_out = "MonoObject*";
+			r_itype.cs_type = r_itype.proxy_name;
+			r_itype.im_type_in = r_itype.proxy_name;
+			r_itype.im_type_out = r_itype.proxy_name;
+		}
+
+		TypeInterface() {
+
+			api_type = ClassDB::API_NONE;
+
+			is_object_type = false;
+			is_singleton = false;
+			is_reference = false;
+			is_instantiable = false;
+
+			memory_own = false;
+			requires_collections = false;
+
+			c_arg_in = "%s";
+
+			class_doc = NULL;
+		}
+	};
+
+	struct InternalCall {
+		String name;
+		String im_type_out; // Return type for the C# method declaration. Also used as companion of [unique_siq]
+		String im_sig; // Signature for the C# method declaration
+		String unique_sig; // Unique signature to avoid duplicates in containers
+		bool editor_only;
+
+		InternalCall() {}
+
+		InternalCall(const String &p_name, const String &p_im_type_out, const String &p_im_sig = String(), const String &p_unique_sig = String()) {
+			name = p_name;
+			im_type_out = p_im_type_out;
+			im_sig = p_im_sig;
+			unique_sig = p_unique_sig;
+			editor_only = false;
+		}
+
+		InternalCall(ClassDB::APIType api_type, const String &p_name, const String &p_im_type_out, const String &p_im_sig = String(), const String &p_unique_sig = String()) {
+			name = p_name;
+			im_type_out = p_im_type_out;
+			im_sig = p_im_sig;
+			unique_sig = p_unique_sig;
+			editor_only = api_type == ClassDB::API_EDITOR;
+		}
+
+		inline bool operator==(const InternalCall &p_a) const {
+			return p_a.unique_sig == unique_sig;
+		}
+	};
+
+	static bool verbose_output;
+
+	Map<String, TypeInterface> placeholder_types;
+	Map<String, TypeInterface> builtin_types;
+	Map<String, TypeInterface> obj_types;
+
+	Map<String, String> extra_members;
+
+	List<InternalCall> method_icalls;
+	Map<const MethodInterface *, const InternalCall *> method_icalls_map;
+
+	List<InternalCall> core_custom_icalls;
+	List<InternalCall> editor_custom_icalls;
+
+	const List<InternalCall>::Element *find_icall_by_name(const String &p_name, const List<InternalCall> &p_list) {
+
+		const List<InternalCall>::Element *it = p_list.front();
+		while (it) {
+			if (it->get().name == p_name) return it;
+			it = it->next();
+		}
+		return NULL;
+	}
+
+	inline String get_unique_sig(const TypeInterface &p_type) {
+		if (p_type.is_reference)
+			return "Ref";
+		else if (p_type.is_object_type)
+			return "Obj";
+
+		return p_type.name;
+	}
+
+	void _generate_header_icalls();
+	void _generate_method_icalls(const TypeInterface &p_itype);
+
+	const TypeInterface *_get_type_by_name_or_null(const String &p_name);
+	const TypeInterface *_get_type_by_name_or_placeholder(const String &p_name);
+
+	void _default_argument_from_variant(const Variant &p_var, ArgumentInterface &r_iarg);
+	void _populate_builtin_type(TypeInterface &r_type, Variant::Type vtype);
+
+	void _populate_object_type_interfaces();
+	void _populate_builtin_type_interfaces();
+
+	Error _generate_cs_type(const TypeInterface &itype, const String &p_output_file);
+
+	Error _save_file(const String &path, const List<String> &content);
+
+	BindingsGenerator();
+
+	BindingsGenerator(const BindingsGenerator &);
+	BindingsGenerator &operator=(const BindingsGenerator &);
+
+public:
+	Error generate_cs_core_project(const String &p_output_dir, bool p_verbose_output = true);
+	Error generate_cs_editor_project(const String &p_output_dir, const String &p_core_dll_path, bool p_verbose_output = true);
+	Error generate_glue(const String &p_output_dir);
+
+	static BindingsGenerator &get_singleton() {
+		static BindingsGenerator singleton;
+		return singleton;
+	}
+
+	static void handle_cmdline_args(const List<String> &p_cmdline_args);
+};
+
+#endif
+
+#endif // BINDINGS_GENERATOR_H
diff --git a/modules/mono/editor/csharp_project.cpp b/modules/mono/editor/csharp_project.cpp
new file mode 100644
index 00000000000..bde5f0fd0b3
--- /dev/null
+++ b/modules/mono/editor/csharp_project.cpp
@@ -0,0 +1,120 @@
+/*************************************************************************/
+/*  csharp_project.cpp                                                   */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2017 Godot Engine contributors (cf. AUTHORS.md)    */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+#include "csharp_project.h"
+
+#include "os/os.h"
+#include "project_settings.h"
+
+#include "../mono_gd/gd_mono_class.h"
+#include "../mono_gd/gd_mono_marshal.h"
+
+namespace CSharpProject {
+
+String generate_core_api_project(const String &p_dir, const Vector<String> &p_files) {
+
+	_GDMONO_SCOPE_DOMAIN_(TOOLS_DOMAIN)
+
+	GDMonoClass *klass = GDMono::get_singleton()->get_editor_tools_assembly()->get_class("GodotSharpTools.Project", "ProjectGenerator");
+
+	Variant dir = p_dir;
+	Variant compile_items = p_files;
+	const Variant *args[2] = { &dir, &compile_items };
+	MonoObject *ex = NULL;
+	MonoObject *ret = klass->get_method("GenCoreApiProject", 2)->invoke(NULL, args, &ex);
+
+	if (ex) {
+		mono_print_unhandled_exception(ex);
+		ERR_FAIL_V(String());
+	}
+
+	return ret ? GDMonoMarshal::mono_string_to_godot((MonoString *)ret) : "";
+}
+
+String generate_editor_api_project(const String &p_dir, const String &p_core_dll_path, const Vector<String> &p_files) {
+
+	_GDMONO_SCOPE_DOMAIN_(TOOLS_DOMAIN)
+
+	GDMonoClass *klass = GDMono::get_singleton()->get_editor_tools_assembly()->get_class("GodotSharpTools.Project", "ProjectGenerator");
+
+	Variant dir = p_dir;
+	Variant core_dll_path = p_core_dll_path;
+	Variant compile_items = p_files;
+	const Variant *args[3] = { &dir, &core_dll_path, &compile_items };
+	MonoObject *ex = NULL;
+	MonoObject *ret = klass->get_method("GenEditorApiProject", 3)->invoke(NULL, args, &ex);
+
+	if (ex) {
+		mono_print_unhandled_exception(ex);
+		ERR_FAIL_V(String());
+	}
+
+	return ret ? GDMonoMarshal::mono_string_to_godot((MonoString *)ret) : "";
+}
+
+String generate_game_project(const String &p_dir, const String &p_name, const Vector<String> &p_files) {
+
+	_GDMONO_SCOPE_DOMAIN_(TOOLS_DOMAIN)
+
+	GDMonoClass *klass = GDMono::get_singleton()->get_editor_tools_assembly()->get_class("GodotSharpTools.Project", "ProjectGenerator");
+
+	Variant dir = p_dir;
+	Variant name = p_name;
+	Variant compile_items = p_files;
+	const Variant *args[3] = { &dir, &name, &compile_items };
+	MonoObject *ex = NULL;
+	MonoObject *ret = klass->get_method("GenGameProject", 3)->invoke(NULL, args, &ex);
+
+	if (ex) {
+		mono_print_unhandled_exception(ex);
+		ERR_FAIL_V(String());
+	}
+
+	return ret ? GDMonoMarshal::mono_string_to_godot((MonoString *)ret) : "";
+}
+
+void add_item(const String &p_project_path, const String &p_item_type, const String &p_include) {
+
+	_GDMONO_SCOPE_DOMAIN_(TOOLS_DOMAIN)
+
+	GDMonoClass *klass = GDMono::get_singleton()->get_editor_tools_assembly()->get_class("GodotSharpTools.Project", "ProjectUtils");
+
+	Variant project_path = p_project_path;
+	Variant item_type = p_item_type;
+	Variant include = p_include;
+	const Variant *args[3] = { &project_path, &item_type, &include };
+	MonoObject *ex = NULL;
+	klass->get_method("AddItemToProjectChecked", 3)->invoke(NULL, args, &ex);
+
+	if (ex) {
+		mono_print_unhandled_exception(ex);
+		ERR_FAIL();
+	}
+}
+} // CSharpProject
diff --git a/modules/mono/editor/csharp_project.h b/modules/mono/editor/csharp_project.h
new file mode 100644
index 00000000000..4832d2251e3
--- /dev/null
+++ b/modules/mono/editor/csharp_project.h
@@ -0,0 +1,44 @@
+/*************************************************************************/
+/*  csharp_project.h                                                     */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2017 Godot Engine contributors (cf. AUTHORS.md)    */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+#ifndef CSHARP_PROJECT_H
+#define CSHARP_PROJECT_H
+
+#include "ustring.h"
+
+namespace CSharpProject {
+
+String generate_core_api_project(const String &p_dir, const Vector<String> &p_files = Vector<String>());
+String generate_editor_api_project(const String &p_dir, const String &p_core_dll_path, const Vector<String> &p_files = Vector<String>());
+String generate_game_project(const String &p_dir, const String &p_name, const Vector<String> &p_files = Vector<String>());
+
+void add_item(const String &p_project_path, const String &p_item_type, const String &p_include);
+}
+
+#endif // CSHARP_PROJECT_H
diff --git a/modules/mono/editor/godotsharp_builds.cpp b/modules/mono/editor/godotsharp_builds.cpp
new file mode 100644
index 00000000000..e7d9c834210
--- /dev/null
+++ b/modules/mono/editor/godotsharp_builds.cpp
@@ -0,0 +1,440 @@
+/*************************************************************************/
+/*  godotsharp_builds.cpp                                                */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2017 Godot Engine contributors (cf. AUTHORS.md)    */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+#include "godotsharp_builds.h"
+
+#include "../godotsharp_dirs.h"
+#include "../mono_gd/gd_mono_class.h"
+#include "../mono_gd/gd_mono_marshal.h"
+#include "../utils/path_utils.h"
+#include "bindings_generator.h"
+#include "godotsharp_editor.h"
+#include "main/main.h"
+
+void godot_icall_BuildInstance_ExitCallback(MonoString *p_solution, MonoString *p_config, int p_exit_code) {
+
+	String solution = GDMonoMarshal::mono_string_to_godot(p_solution);
+	String config = GDMonoMarshal::mono_string_to_godot(p_config);
+	GodotSharpBuilds::get_singleton()->build_exit_callback(MonoBuildInfo(solution, config), p_exit_code);
+}
+
+MonoString *godot_icall_BuildInstance_get_MSBuildPath() {
+
+	GodotSharpBuilds::BuildTool build_tool = GodotSharpBuilds::BuildTool(int(EditorSettings::get_singleton()->get("mono/builds/build_tool")));
+
+#ifdef WINDOWS_ENABLED
+	switch (build_tool) {
+		case GodotSharpBuilds::MSBUILD: {
+			static String msbuild_tools_path = MonoRegUtils::find_msbuild_tools_path();
+
+			if (msbuild_tools_path.length()) {
+				if (!msbuild_tools_path.ends_with("\\"))
+					msbuild_tools_path += "\\";
+
+				return GDMonoMarshal::mono_string_from_godot(msbuild_tools_path + "MSBuild.exe");
+			}
+
+			OS::get_singleton()->print("Cannot find System's MSBuild. Trying with Mono's...\n");
+		}
+		case GodotSharpBuilds::MSBUILD_MONO: {
+			String msbuild_path = GDMono::get_singleton()->get_mono_reg_info().bin_dir.plus_file("msbuild.bat");
+
+			if (!FileAccess::exists(msbuild_path)) {
+				WARN_PRINTS("Cannot find msbuild ('mono/builds/build_tool'). Tried with path: " + msbuild_path);
+			}
+
+			return GDMonoMarshal::mono_string_from_godot(msbuild_path);
+		}
+		case GodotSharpBuilds::XBUILD: {
+			String xbuild_path = GDMono::get_singleton()->get_mono_reg_info().bin_dir.plus_file("xbuild.bat");
+
+			if (!FileAccess::exists(xbuild_path)) {
+				WARN_PRINTS("Cannot find xbuild ('mono/builds/build_tool'). Tried with path: " + xbuild_path);
+			}
+
+			return GDMonoMarshal::mono_string_from_godot(xbuild_path);
+		}
+		default:
+			ERR_EXPLAIN("You don't deserve to live");
+			CRASH_NOW();
+	}
+#else
+	static bool msbuild_found = path_which("msbuild").length();
+
+	if (build_tool != GodotSharpBuilds::XBUILD && !msbuild_found) {
+		WARN_PRINT("Cannot find msbuild ('mono/builds/build_tool').");
+	}
+
+	return GDMonoMarshal::mono_string_from_godot(build_tool != GodotSharpBuilds::XBUILD ? "msbuild" : "xbuild");
+#endif
+}
+
+void GodotSharpBuilds::_register_internal_calls() {
+
+	mono_add_internal_call("GodotSharpTools.Build.BuildSystem::godot_icall_BuildInstance_ExitCallback", (void *)godot_icall_BuildInstance_ExitCallback);
+	mono_add_internal_call("GodotSharpTools.Build.BuildInstance::godot_icall_BuildInstance_get_MSBuildPath", (void *)godot_icall_BuildInstance_get_MSBuildPath);
+}
+
+void GodotSharpBuilds::show_build_error_dialog(const String &p_message) {
+
+	GodotSharpEditor::get_singleton()->show_error_dialog(p_message, "Build error");
+	MonoBottomPanel::get_singleton()->show_build_tab();
+}
+
+bool GodotSharpBuilds::build_api_sln(const String &p_name, const String &p_api_sln_dir, const String &p_config) {
+
+	String api_sln_file = p_api_sln_dir.plus_file(p_name + ".sln");
+	String api_assembly_dir = p_api_sln_dir.plus_file("bin").plus_file(p_config);
+	String api_assembly_file = api_assembly_dir.plus_file(p_name + ".dll");
+
+	if (!FileAccess::exists(api_assembly_file)) {
+		MonoBuildInfo api_build_info(api_sln_file, p_config);
+		api_build_info.custom_props.push_back("NoWarn=1591"); // Ignore missing documentation warnings
+
+		if (!GodotSharpBuilds::get_singleton()->build(api_build_info)) {
+			show_build_error_dialog("Failed to build " + p_name + " solution.");
+			return false;
+		}
+	}
+
+	return true;
+}
+
+bool GodotSharpBuilds::copy_api_assembly(const String &p_src_dir, const String &p_dst_dir, const String &p_assembly_name) {
+
+	String assembly_file = p_assembly_name + ".dll";
+	String assembly_src = p_src_dir.plus_file(assembly_file);
+	String assembly_dst = p_dst_dir.plus_file(assembly_file);
+
+	if (!FileAccess::exists(assembly_dst) || FileAccess::get_modified_time(assembly_src) > FileAccess::get_modified_time(assembly_dst)) {
+		DirAccess *da = DirAccess::create(DirAccess::ACCESS_FILESYSTEM);
+
+		String xml_file = p_assembly_name + ".xml";
+		if (da->copy(p_src_dir.plus_file(xml_file), p_dst_dir.plus_file(xml_file)) != OK)
+			WARN_PRINTS("Failed to copy " + xml_file);
+
+		String pdb_file = p_assembly_name + ".pdb";
+		if (da->copy(p_src_dir.plus_file(pdb_file), p_dst_dir.plus_file(pdb_file)) != OK)
+			WARN_PRINTS("Failed to copy " + pdb_file);
+
+		Error err = da->copy(assembly_src, assembly_dst);
+
+		memdelete(da);
+
+		if (err != OK) {
+			show_build_error_dialog("Failed to copy " API_ASSEMBLY_NAME ".dll");
+			return false;
+		}
+	}
+
+	return true;
+}
+
+bool GodotSharpBuilds::make_api_sln(GodotSharpBuilds::APIType p_api_type) {
+
+	String api_name = p_api_type == API_CORE ? API_ASSEMBLY_NAME : EDITOR_API_ASSEMBLY_NAME;
+	String api_build_config = "Release";
+
+	EditorProgress pr("mono_build_release_" + api_name, "Building " + api_name + " solution...", 4);
+
+	pr.step("Generating " + api_name + " solution");
+
+	uint64_t core_hash = GDMono::get_singleton()->get_api_core_hash();
+	uint64_t editor_hash = GDMono::get_singleton()->get_api_editor_hash();
+
+	String core_api_sln_dir = GodotSharpDirs::get_mono_solutions_dir().plus_file(API_ASSEMBLY_NAME "_" + itos(core_hash));
+	String editor_api_sln_dir = GodotSharpDirs::get_mono_solutions_dir().plus_file(EDITOR_API_ASSEMBLY_NAME "_" + itos(editor_hash));
+
+	String api_sln_dir = p_api_type == API_CORE ? core_api_sln_dir : editor_api_sln_dir;
+	String api_sln_file = api_sln_dir.plus_file(api_name + ".sln");
+
+	if (!DirAccess::exists(api_sln_dir) || !FileAccess::exists(api_sln_file)) {
+		String core_api_assembly;
+
+		if (p_api_type == API_EDITOR) {
+			core_api_assembly = core_api_sln_dir.plus_file("bin")
+										.plus_file(api_build_config)
+										.plus_file(API_ASSEMBLY_NAME ".dll");
+		}
+
+#ifndef DEBUG_METHODS_ENABLED
+#error "How am I supposed to generate the bindings?"
+#endif
+
+		BindingsGenerator &gen = BindingsGenerator::get_singleton();
+		bool gen_verbose = OS::get_singleton()->is_stdout_verbose();
+
+		Error err = p_api_type == API_CORE ?
+							gen.generate_cs_core_project(api_sln_dir, gen_verbose) :
+							gen.generate_cs_editor_project(api_sln_dir, core_api_assembly, gen_verbose);
+
+		if (err != OK) {
+			show_build_error_dialog("Failed to generate " + api_name + " solution. Error: " + itos(err));
+			return false;
+		}
+	}
+
+	pr.step("Building " + api_name + " solution");
+
+	if (!GodotSharpBuilds::build_api_sln(api_name, api_sln_dir, api_build_config))
+		return false;
+
+	pr.step("Copying " + api_name + " assembly");
+
+	String res_assemblies_dir = GodotSharpDirs::get_res_assemblies_dir();
+
+	// Create assemblies directory if needed
+	if (!DirAccess::exists(res_assemblies_dir)) {
+		DirAccess *da = DirAccess::create_for_path(res_assemblies_dir);
+		Error err = da->make_dir_recursive(res_assemblies_dir);
+		memdelete(da);
+
+		if (err != OK) {
+			show_build_error_dialog("Failed to create assemblies directory. Error: " + itos(err));
+			return false;
+		}
+	}
+
+	// Copy the built assembly to the assemblies directory
+	String api_assembly_dir = api_sln_dir.plus_file("bin").plus_file(api_build_config);
+	if (!GodotSharpBuilds::copy_api_assembly(api_assembly_dir, res_assemblies_dir, api_name))
+		return false;
+
+	pr.step("Done");
+
+	return true;
+}
+
+bool godotsharp_build_callback() {
+
+	if (!FileAccess::exists(GodotSharpDirs::get_project_sln_path()))
+		return true; // No solution to build
+
+	if (!GodotSharpBuilds::make_api_sln(GodotSharpBuilds::API_CORE))
+		return false;
+
+	if (!GodotSharpBuilds::make_api_sln(GodotSharpBuilds::API_EDITOR))
+		return false;
+
+	EditorProgress pr("mono_project_debug_build", "Building project solution...", 2);
+
+	pr.step("Building project solution");
+
+	MonoBuildInfo build_info(GodotSharpDirs::get_project_sln_path(), "Tools");
+	if (!GodotSharpBuilds::get_singleton()->build(build_info)) {
+		GodotSharpBuilds::show_build_error_dialog("Failed to build project solution");
+		return false;
+	}
+
+	pr.step("Done");
+
+	return true;
+}
+
+GodotSharpBuilds *GodotSharpBuilds::singleton = NULL;
+
+void GodotSharpBuilds::build_exit_callback(const MonoBuildInfo &p_build_info, int p_exit_code) {
+
+	BuildProcess *match = builds.getptr(p_build_info);
+	ERR_FAIL_COND(!match);
+
+	BuildProcess &bp = *match;
+	bp.on_exit(p_exit_code);
+}
+
+void GodotSharpBuilds::restart_build(MonoBuildTab *p_build_tab) {
+}
+
+void GodotSharpBuilds::stop_build(MonoBuildTab *p_build_tab) {
+}
+
+bool GodotSharpBuilds::build(const MonoBuildInfo &p_build_info) {
+
+	BuildProcess *match = builds.getptr(p_build_info);
+
+	if (match) {
+		BuildProcess &bp = *match;
+		bp.start(true);
+		return bp.exit_code == 0;
+	} else {
+		BuildProcess bp = BuildProcess(p_build_info);
+		bp.start(true);
+		builds.set(p_build_info, bp);
+		return bp.exit_code == 0;
+	}
+}
+
+bool GodotSharpBuilds::build_async(const MonoBuildInfo &p_build_info, GodotSharpBuild_ExitCallback p_callback) {
+
+	BuildProcess *match = builds.getptr(p_build_info);
+
+	if (match) {
+		BuildProcess &bp = *match;
+		bp.start();
+		return !bp.exited; // failed to start
+	} else {
+		BuildProcess bp = BuildProcess(p_build_info, p_callback);
+		bp.start();
+		builds.set(p_build_info, bp);
+		return !bp.exited; // failed to start
+	}
+}
+
+GodotSharpBuilds::GodotSharpBuilds() {
+
+	singleton = this;
+
+	EditorNode::get_singleton()->add_build_callback(&godotsharp_build_callback);
+
+	// Build tool settings
+	EditorSettings *ed_settings = EditorSettings::get_singleton();
+	if (!ed_settings->has("mono/builds/build_tool")) {
+		ed_settings->set("mono/builds/build_tool", MSBUILD);
+	}
+	ed_settings->add_property_hint(PropertyInfo(Variant::INT, "mono/builds/build_tool", PROPERTY_HINT_ENUM, "MSBuild (System),MSBuild (Mono),xbuild"));
+}
+
+GodotSharpBuilds::~GodotSharpBuilds() {
+
+	singleton = NULL;
+}
+
+void GodotSharpBuilds::BuildProcess::on_exit(int p_exit_code) {
+
+	exited = true;
+	exit_code = p_exit_code;
+	build_tab->on_build_exit(p_exit_code == 0 ? MonoBuildTab::RESULT_SUCCESS : MonoBuildTab::RESULT_ERROR);
+	build_instance.unref();
+
+	if (exit_callback)
+		exit_callback(exit_code);
+}
+
+void GodotSharpBuilds::BuildProcess::start(bool p_blocking) {
+
+	_GDMONO_SCOPE_DOMAIN_(TOOLS_DOMAIN)
+
+	exit_code = -1;
+
+	String logs_dir = GodotSharpDirs::get_build_logs_dir().plus_file(build_info.solution.md5_text() + "_" + build_info.configuration);
+
+	if (build_tab) {
+		build_tab->on_build_start();
+	} else {
+		build_tab = memnew(MonoBuildTab(build_info, logs_dir));
+		MonoBottomPanel::get_singleton()->add_build_tab(build_tab);
+	}
+
+	if (p_blocking) {
+		// Required in order to update the build tasks list
+		Main::iteration();
+	}
+
+	if (!exited) {
+		ERR_PRINT("BuildProcess::start called, but process still running");
+		exited = true;
+		build_tab->on_build_exec_failed("!exited");
+		return;
+	}
+
+	exited = false;
+
+	// Remove old issues file
+
+	String issues_file = "msbuild_issues.csv";
+	DirAccessRef d = DirAccess::create_for_path(logs_dir);
+	if (d->file_exists(issues_file)) {
+		Error err = d->remove(issues_file);
+		if (err != OK) {
+			ERR_PRINTS("Cannot remove file: " + logs_dir.plus_file(issues_file));
+			exited = true;
+			build_tab->on_build_exec_failed("Cannot remove file: " + issues_file);
+			return;
+		}
+	}
+
+	GDMonoClass *klass = GDMono::get_singleton()->get_editor_tools_assembly()->get_class("GodotSharpTools.Build", "BuildInstance");
+
+	MonoObject *mono_object = mono_object_new(mono_domain_get(), klass->get_raw());
+
+	// Construct
+
+	Variant solution = build_info.solution;
+	Variant config = build_info.configuration;
+
+	const Variant *ctor_args[2] = { &solution, &config };
+
+	MonoObject *ex = NULL;
+	GDMonoMethod *ctor = klass->get_method(".ctor", 2);
+	ctor->invoke(mono_object, ctor_args, &ex);
+
+	if (ex) {
+		exited = true;
+		build_tab->on_build_exec_failed("The build constructor threw an exception.\n" + GDMonoUtils::get_exception_name_and_message(ex));
+		ERR_FAIL();
+	}
+
+	// Call Build
+
+	Variant logger_assembly = OS::get_singleton()->get_executable_path().get_base_dir().plus_file(EDITOR_TOOLS_ASSEMBLY_NAME) + ".dll";
+	Variant logger_output_dir = logs_dir;
+	Variant custom_props = build_info.custom_props;
+
+	const Variant *args[3] = { &logger_assembly, &logger_output_dir, &custom_props };
+
+	ex = NULL;
+	GDMonoMethod *build_method = klass->get_method(p_blocking ? "Build" : "BuildAsync", 3);
+	build_method->invoke(mono_object, args, &ex);
+
+	if (ex) {
+		exited = true;
+		build_tab->on_build_exec_failed("The build method threw an exception.\n" + GDMonoUtils::get_exception_name_and_message(ex));
+		ERR_FAIL();
+	}
+
+	// Build returned
+
+	if (p_blocking) {
+		exited = true;
+		exit_code = klass->get_field("exitCode")->get_int_value(mono_object);
+		build_tab->on_build_exit(exit_code == 0 ? MonoBuildTab::RESULT_SUCCESS : MonoBuildTab::RESULT_ERROR);
+	} else {
+		build_instance = MonoGCHandle::create_strong(mono_object);
+		exited = false;
+	}
+}
+
+GodotSharpBuilds::BuildProcess::BuildProcess(const MonoBuildInfo &p_build_info, GodotSharpBuild_ExitCallback p_callback) {
+
+	build_info = p_build_info;
+	build_tab = NULL;
+	exit_callback = p_callback;
+	exited = true;
+	exit_code = -1;
+}
diff --git a/modules/mono/editor/godotsharp_builds.h b/modules/mono/editor/godotsharp_builds.h
new file mode 100644
index 00000000000..6d5fa3b44a6
--- /dev/null
+++ b/modules/mono/editor/godotsharp_builds.h
@@ -0,0 +1,96 @@
+/*************************************************************************/
+/*  godotsharp_builds.h                                                  */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2017 Godot Engine contributors (cf. AUTHORS.md)    */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+#ifndef GODOTSHARP_BUILDS_H
+#define GODOTSHARP_BUILDS_H
+
+#include "mono_bottom_panel.h"
+#include "mono_build_info.h"
+
+typedef void (*GodotSharpBuild_ExitCallback)(int);
+
+class GodotSharpBuilds {
+
+private:
+	struct BuildProcess {
+		Ref<MonoGCHandle> build_instance;
+		MonoBuildInfo build_info;
+		MonoBuildTab *build_tab;
+		GodotSharpBuild_ExitCallback exit_callback;
+		bool exited;
+		int exit_code;
+
+		void on_exit(int p_exit_code);
+		void start(bool p_blocking = false);
+
+		BuildProcess() {}
+		BuildProcess(const MonoBuildInfo &p_build_info, GodotSharpBuild_ExitCallback p_callback = NULL);
+	};
+
+	HashMap<MonoBuildInfo, BuildProcess, MonoBuildInfo::Hasher> builds;
+
+	static GodotSharpBuilds *singleton;
+
+	friend class GDMono;
+	static void _register_internal_calls();
+
+public:
+	enum APIType {
+		API_CORE,
+		API_EDITOR
+	};
+
+	enum BuildTool {
+		MSBUILD,
+		MSBUILD_MONO,
+		XBUILD
+	};
+
+	_FORCE_INLINE_ static GodotSharpBuilds *get_singleton() { return singleton; }
+
+	static void show_build_error_dialog(const String &p_message);
+
+	void build_exit_callback(const MonoBuildInfo &p_build_info, int p_exit_code);
+
+	void restart_build(MonoBuildTab *p_build_tab);
+	void stop_build(MonoBuildTab *p_build_tab);
+
+	bool build(const MonoBuildInfo &p_build_info);
+	bool build_async(const MonoBuildInfo &p_build_info, GodotSharpBuild_ExitCallback p_callback = NULL);
+
+	static bool build_api_sln(const String &p_name, const String &p_api_sln_dir, const String &p_config);
+	static bool copy_api_assembly(const String &p_src_dir, const String &p_dst_dir, const String &p_assembly_name);
+
+	static bool make_api_sln(APIType p_api_type);
+
+	GodotSharpBuilds();
+	~GodotSharpBuilds();
+};
+
+#endif // GODOTSHARP_BUILDS_H
diff --git a/modules/mono/editor/godotsharp_editor.cpp b/modules/mono/editor/godotsharp_editor.cpp
new file mode 100644
index 00000000000..5aaf0294952
--- /dev/null
+++ b/modules/mono/editor/godotsharp_editor.cpp
@@ -0,0 +1,256 @@
+/*************************************************************************/
+/*  godotsharp_editor.cpp                                                */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2017 Godot Engine contributors (cf. AUTHORS.md)    */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+#include "godotsharp_editor.h"
+
+#include "core/os/os.h"
+#include "core/project_settings.h"
+#include "scene/gui/control.h"
+#include "scene/main/node.h"
+
+#include "../csharp_script.h"
+#include "../godotsharp_dirs.h"
+#include "../mono_gd/gd_mono.h"
+#include "../utils/path_utils.h"
+#include "bindings_generator.h"
+#include "csharp_project.h"
+#include "net_solution.h"
+
+#ifdef WINDOWS_ENABLED
+#include "../utils/mono_reg_utils.h"
+#endif
+
+class MonoReloadNode : public Node {
+	GDCLASS(MonoReloadNode, Node)
+
+protected:
+	void _notification(int p_what) {
+		switch (p_what) {
+			case MainLoop::NOTIFICATION_WM_FOCUS_IN: {
+				CSharpLanguage::get_singleton()->reload_assemblies_if_needed(true);
+			} break;
+			default: {
+			} break;
+		};
+	}
+};
+
+GodotSharpEditor *GodotSharpEditor::singleton = NULL;
+
+bool GodotSharpEditor::_create_project_solution() {
+
+	EditorProgress pr("create_csharp_solution", "Generating solution...", 2);
+
+	pr.step("Generating C# project...");
+
+	String path = OS::get_singleton()->get_resource_dir();
+	String name = ProjectSettings::get_singleton()->get("application/config/name");
+	String guid = CSharpProject::generate_game_project(path, name);
+
+	if (guid.length()) {
+
+		NETSolution solution(name);
+
+		if (!solution.set_path(path)) {
+			show_error_dialog("Failed to create solution.");
+			return false;
+		}
+
+		Vector<String> extra_configs;
+		extra_configs.push_back("Tools");
+
+		solution.add_new_project(name, guid, extra_configs);
+
+		Error sln_error = solution.save();
+
+		if (sln_error != OK) {
+			show_error_dialog("Failed to save solution.");
+			return false;
+		}
+
+		if (!GodotSharpBuilds::make_api_sln(GodotSharpBuilds::API_CORE))
+			return false;
+
+		if (!GodotSharpBuilds::make_api_sln(GodotSharpBuilds::API_EDITOR))
+			return false;
+
+		pr.step("Done");
+
+		// Here, after all calls to progress_task_step
+		call_deferred("_remove_create_sln_menu_option");
+
+	} else {
+		show_error_dialog("Failed to create C# project.");
+	}
+
+	return true;
+}
+
+void GodotSharpEditor::_remove_create_sln_menu_option() {
+
+	menu_popup->remove_item(menu_popup->get_item_index(MENU_CREATE_SLN));
+
+	if (menu_popup->get_item_count() == 0)
+		menu_button->hide();
+
+	bottom_panel_btn->show();
+}
+
+void GodotSharpEditor::_menu_option_pressed(int p_id) {
+
+	switch (p_id) {
+		case MENU_CREATE_SLN: {
+
+			_create_project_solution();
+		} break;
+		default:
+			ERR_FAIL();
+	}
+}
+
+void GodotSharpEditor::_bind_methods() {
+
+	ClassDB::bind_method(D_METHOD("_create_project_solution"), &GodotSharpEditor::_create_project_solution);
+	ClassDB::bind_method(D_METHOD("_remove_create_sln_menu_option"), &GodotSharpEditor::_remove_create_sln_menu_option);
+	ClassDB::bind_method(D_METHOD("_menu_option_pressed", "id"), &GodotSharpEditor::_menu_option_pressed);
+}
+
+void GodotSharpEditor::show_error_dialog(const String &p_message, const String &p_title) {
+
+	error_dialog->set_title(p_title);
+	error_dialog->set_text(p_message);
+	error_dialog->popup_centered_minsize();
+}
+
+Error GodotSharpEditor::open_in_external_editor(const Ref<Script> &p_script, int p_line, int p_col) {
+
+	ExternalEditor editor = ExternalEditor(int(EditorSettings::get_singleton()->get("mono/editor/external_editor")));
+
+	switch (editor) {
+		case EDITOR_CODE: {
+			List<String> args;
+			args.push_back(ProjectSettings::get_singleton()->get_resource_path());
+
+			String script_path = ProjectSettings::get_singleton()->globalize_path(p_script->get_path());
+
+			if (p_line >= 0) {
+				args.push_back("-g");
+				args.push_back(script_path + ":" + itos(p_line) + ":" + itos(p_col));
+			} else {
+				args.push_back(script_path);
+			}
+
+			static String program = path_which("code");
+
+			Error err = OS::get_singleton()->execute(program.length() ? program : "code", args, false);
+
+			if (err != OK) {
+				ERR_PRINT("GodotSharp: Could not execute external editor");
+				return err;
+			}
+		} break;
+		case EDITOR_MONODEVELOP: {
+			if (!monodevel_instance)
+				monodevel_instance = memnew(MonoDevelopInstance(GodotSharpDirs::get_project_sln_path()));
+
+			String script_path = ProjectSettings::get_singleton()->globalize_path(p_script->get_path());
+			monodevel_instance->execute(script_path);
+		} break;
+		case EDITOR_VISUAL_STUDIO:
+		// TODO
+		// devenv <PathToSolutionFolder>
+		// devenv /edit <PathToCsFile> /command "edit.goto <Line>"
+		// HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\VisualStudio\SxS\VS7
+		default:
+			return ERR_UNAVAILABLE;
+	}
+
+	return OK;
+}
+
+bool GodotSharpEditor::overrides_external_editor() {
+
+	return ExternalEditor(int(EditorSettings::get_singleton()->get("mono/editor/external_editor"))) != EDITOR_NONE;
+}
+
+GodotSharpEditor::GodotSharpEditor(EditorNode *p_editor) {
+
+	singleton = this;
+
+	monodevel_instance = NULL;
+
+	editor = p_editor;
+
+	error_dialog = memnew(AcceptDialog);
+	editor->get_gui_base()->add_child(error_dialog);
+
+	bottom_panel_btn = editor->add_bottom_panel_item("Mono", memnew(MonoBottomPanel(editor)));
+
+	godotsharp_builds = memnew(GodotSharpBuilds);
+
+	editor->add_child(memnew(MonoReloadNode));
+
+	menu_button = memnew(MenuButton);
+	menu_button->set_text("Mono");
+	menu_popup = menu_button->get_popup();
+
+	String sln_path = GodotSharpDirs::get_project_sln_path();
+	String csproj_path = GodotSharpDirs::get_project_csproj_path();
+
+	if (!FileAccess::exists(sln_path) || !FileAccess::exists(csproj_path)) {
+		bottom_panel_btn->hide();
+		menu_popup->add_item("Create C# solution", MENU_CREATE_SLN);
+	}
+
+	menu_popup->connect("id_pressed", this, "_menu_option_pressed");
+
+	if (menu_popup->get_item_count() == 0)
+		menu_button->hide();
+
+	editor->get_menu_hb()->add_child(menu_button);
+
+	// External editor settings
+	EditorSettings *ed_settings = EditorSettings::get_singleton();
+	if (!ed_settings->has("mono/editor/external_editor")) {
+		ed_settings->set("mono/editor/external_editor", EDITOR_NONE);
+	}
+	ed_settings->add_property_hint(PropertyInfo(Variant::INT, "mono/editor/external_editor", PROPERTY_HINT_ENUM, "None,MonoDevelop,Visual Studio,Visual Studio Code"));
+}
+
+GodotSharpEditor::~GodotSharpEditor() {
+
+	singleton = NULL;
+
+	memdelete(godotsharp_builds);
+
+	if (monodevel_instance) {
+		memdelete(monodevel_instance);
+		monodevel_instance = NULL;
+	}
+}
diff --git a/modules/mono/editor/godotsharp_editor.h b/modules/mono/editor/godotsharp_editor.h
new file mode 100644
index 00000000000..1ecb8c7a94b
--- /dev/null
+++ b/modules/mono/editor/godotsharp_editor.h
@@ -0,0 +1,87 @@
+/*************************************************************************/
+/*  godotsharp_editor.h                                                  */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2017 Godot Engine contributors (cf. AUTHORS.md)    */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+#ifndef GODOTSHARP_EDITOR_H
+#define GODOTSHARP_EDITOR_H
+
+#include "godotsharp_builds.h"
+
+#include "monodevelop_instance.h"
+
+class GodotSharpEditor : public Node {
+	GDCLASS(GodotSharpEditor, Object)
+
+	EditorNode *editor;
+
+	MenuButton *menu_button;
+	PopupMenu *menu_popup;
+
+	AcceptDialog *error_dialog;
+
+	ToolButton *bottom_panel_btn;
+
+	GodotSharpBuilds *godotsharp_builds;
+
+	MonoDevelopInstance *monodevel_instance;
+
+	bool _create_project_solution();
+
+	void _remove_create_sln_menu_option();
+
+	void _menu_option_pressed(int p_id);
+
+	static GodotSharpEditor *singleton;
+
+protected:
+	static void _bind_methods();
+
+public:
+	enum MenuOptions {
+		MENU_CREATE_SLN
+	};
+
+	enum ExternalEditor {
+		EDITOR_NONE,
+		EDITOR_MONODEVELOP,
+		EDITOR_VISUAL_STUDIO,
+		EDITOR_CODE,
+	};
+
+	_FORCE_INLINE_ static GodotSharpEditor *get_singleton() { return singleton; }
+
+	void show_error_dialog(const String &p_message, const String &p_title = "Error");
+
+	Error open_in_external_editor(const Ref<Script> &p_script, int p_line, int p_col);
+	bool overrides_external_editor();
+
+	GodotSharpEditor(EditorNode *p_editor);
+	~GodotSharpEditor();
+};
+
+#endif // GODOTSHARP_EDITOR_H
diff --git a/modules/mono/editor/mono_bottom_panel.cpp b/modules/mono/editor/mono_bottom_panel.cpp
new file mode 100644
index 00000000000..07109eaac79
--- /dev/null
+++ b/modules/mono/editor/mono_bottom_panel.cpp
@@ -0,0 +1,441 @@
+/*************************************************************************/
+/*  mono_bottom_panel.cpp                                                */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2017 Godot Engine contributors (cf. AUTHORS.md)    */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+#include "mono_bottom_panel.h"
+
+#include "../csharp_script.h"
+#include "godotsharp_editor.h"
+
+MonoBottomPanel *MonoBottomPanel::singleton = NULL;
+
+void MonoBottomPanel::_update_build_tabs_list() {
+
+	build_tabs_list->clear();
+
+	int current_tab = build_tabs->get_current_tab();
+
+	bool no_current_tab = current_tab < 0 || current_tab >= build_tabs->get_tab_count();
+
+	for (int i = 0; i < build_tabs->get_child_count(); i++) {
+
+		MonoBuildTab *tab = Object::cast_to<MonoBuildTab>(build_tabs->get_child(i));
+
+		if (tab) {
+			String item_name = tab->build_info.solution.get_file().get_basename();
+			item_name += " [" + tab->build_info.configuration + "]";
+
+			build_tabs_list->add_item(item_name, tab->get_icon_texture());
+
+			String item_tooltip = String("Solution: ") + tab->build_info.solution;
+			item_tooltip += String("\nConfiguration: ") + tab->build_info.configuration;
+			item_tooltip += String("\nStatus: ");
+
+			if (tab->build_exited) {
+				item_tooltip += tab->build_result == MonoBuildTab::RESULT_SUCCESS ? "Succeeded" : "Errored";
+			} else {
+				item_tooltip += "Running";
+			}
+
+			if (!tab->build_exited || !tab->build_result == MonoBuildTab::RESULT_SUCCESS) {
+				item_tooltip += "\nErrors: " + itos(tab->error_count);
+			}
+
+			item_tooltip += "\nWarnings: " + itos(tab->warning_count);
+
+			build_tabs_list->set_item_tooltip(i, item_tooltip);
+
+			if (no_current_tab || current_tab == i) {
+				build_tabs_list->select(i);
+				_build_tab_item_selected(i);
+			}
+		}
+	}
+}
+
+void MonoBottomPanel::add_build_tab(MonoBuildTab *p_build_tab) {
+
+	build_tabs->add_child(p_build_tab);
+	raise_build_tab(p_build_tab);
+}
+
+void MonoBottomPanel::raise_build_tab(MonoBuildTab *p_build_tab) {
+
+	ERR_FAIL_COND(p_build_tab->get_parent() != build_tabs);
+	build_tabs->move_child(p_build_tab, 0);
+	_update_build_tabs_list();
+}
+
+void MonoBottomPanel::show_build_tab() {
+
+	for (int i = 0; i < panel_tabs->get_tab_count(); i++) {
+		if (panel_tabs->get_tab_control(i) == panel_builds_tab) {
+			panel_tabs->set_current_tab(i);
+			editor->make_bottom_panel_item_visible(this);
+			return;
+		}
+	}
+
+	ERR_PRINT("Builds tab not found");
+}
+
+void MonoBottomPanel::_build_tab_item_selected(int p_idx) {
+
+	ERR_FAIL_INDEX(p_idx, build_tabs->get_tab_count());
+	build_tabs->set_current_tab(p_idx);
+}
+
+void MonoBottomPanel::_build_tab_changed(int p_idx) {
+
+	if (p_idx < 0 || p_idx >= build_tabs->get_tab_count()) {
+		warnings_btn->set_visible(false);
+		errors_btn->set_visible(false);
+	} else {
+		warnings_btn->set_visible(true);
+		errors_btn->set_visible(true);
+	}
+}
+
+void MonoBottomPanel::_warnings_toggled(bool p_pressed) {
+
+	int current_tab = build_tabs->get_current_tab();
+	ERR_FAIL_INDEX(current_tab, build_tabs->get_tab_count());
+	MonoBuildTab *build_tab = Object::cast_to<MonoBuildTab>(build_tabs->get_child(current_tab));
+	build_tab->warnings_visible = p_pressed;
+	build_tab->_update_issues_list();
+}
+
+void MonoBottomPanel::_errors_toggled(bool p_pressed) {
+
+	int current_tab = build_tabs->get_current_tab();
+	ERR_FAIL_INDEX(current_tab, build_tabs->get_tab_count());
+	MonoBuildTab *build_tab = Object::cast_to<MonoBuildTab>(build_tabs->get_child(current_tab));
+	build_tab->errors_visible = p_pressed;
+	build_tab->_update_issues_list();
+}
+
+void MonoBottomPanel::_notification(int p_what) {
+
+	switch (p_what) {
+
+		case EditorSettings::NOTIFICATION_EDITOR_SETTINGS_CHANGED: {
+			panel_tabs->add_style_override("panel", editor->get_gui_base()->get_stylebox("DebuggerPanel", "EditorStyles"));
+			panel_tabs->add_style_override("tab_fg", editor->get_gui_base()->get_stylebox("DebuggerTabFG", "EditorStyles"));
+			panel_tabs->add_style_override("tab_bg", editor->get_gui_base()->get_stylebox("DebuggerTabBG", "EditorStyles"));
+		} break;
+	}
+}
+
+void MonoBottomPanel::_bind_methods() {
+
+	ClassDB::bind_method(D_METHOD("_warnings_toggled", "pressed"), &MonoBottomPanel::_warnings_toggled);
+	ClassDB::bind_method(D_METHOD("_errors_toggled", "pressed"), &MonoBottomPanel::_errors_toggled);
+	ClassDB::bind_method(D_METHOD("_build_tab_item_selected", "idx"), &MonoBottomPanel::_build_tab_item_selected);
+	ClassDB::bind_method(D_METHOD("_build_tab_changed", "idx"), &MonoBottomPanel::_build_tab_changed);
+}
+
+MonoBottomPanel::MonoBottomPanel(EditorNode *p_editor) {
+
+	singleton = this;
+
+	editor = p_editor;
+
+	set_v_size_flags(SIZE_EXPAND_FILL);
+	set_anchors_and_margins_preset(Control::PRESET_WIDE);
+
+	panel_tabs = memnew(TabContainer);
+	panel_tabs->set_tab_align(TabContainer::ALIGN_LEFT);
+	panel_tabs->add_style_override("panel", editor->get_gui_base()->get_stylebox("DebuggerPanel", "EditorStyles"));
+	panel_tabs->add_style_override("tab_fg", editor->get_gui_base()->get_stylebox("DebuggerTabFG", "EditorStyles"));
+	panel_tabs->add_style_override("tab_bg", editor->get_gui_base()->get_stylebox("DebuggerTabBG", "EditorStyles"));
+	panel_tabs->set_custom_minimum_size(Size2(0, 228) * EDSCALE);
+	panel_tabs->set_v_size_flags(SIZE_EXPAND_FILL);
+	add_child(panel_tabs);
+
+	{ // Builds
+		panel_builds_tab = memnew(VBoxContainer);
+		panel_builds_tab->set_name(TTR("Builds"));
+		panel_builds_tab->set_h_size_flags(SIZE_EXPAND_FILL);
+		panel_tabs->add_child(panel_builds_tab);
+
+		HBoxContainer *toolbar_hbc = memnew(HBoxContainer);
+		toolbar_hbc->set_h_size_flags(SIZE_EXPAND_FILL);
+		panel_builds_tab->add_child(toolbar_hbc);
+
+		toolbar_hbc->add_spacer();
+
+		warnings_btn = memnew(ToolButton);
+		warnings_btn->set_text("Warnings");
+		warnings_btn->set_toggle_mode(true);
+		warnings_btn->set_pressed(true);
+		warnings_btn->set_visible(false);
+		warnings_btn->set_focus_mode(FOCUS_NONE);
+		warnings_btn->connect("toggled", this, "_warnings_toggled");
+		toolbar_hbc->add_child(warnings_btn);
+
+		errors_btn = memnew(ToolButton);
+		errors_btn->set_text("Errors");
+		errors_btn->set_toggle_mode(true);
+		errors_btn->set_pressed(true);
+		errors_btn->set_visible(false);
+		errors_btn->set_focus_mode(FOCUS_NONE);
+		errors_btn->connect("toggled", this, "_errors_toggled");
+		toolbar_hbc->add_child(errors_btn);
+
+		HSplitContainer *hsc = memnew(HSplitContainer);
+		hsc->set_h_size_flags(SIZE_EXPAND_FILL);
+		hsc->set_v_size_flags(SIZE_EXPAND_FILL);
+		panel_builds_tab->add_child(hsc);
+
+		build_tabs_list = memnew(ItemList);
+		build_tabs_list->set_h_size_flags(SIZE_EXPAND_FILL);
+		build_tabs_list->connect("item_selected", this, "_build_tab_item_selected");
+		hsc->add_child(build_tabs_list);
+
+		build_tabs = memnew(TabContainer);
+		build_tabs->set_tab_align(TabContainer::ALIGN_LEFT);
+		build_tabs->set_h_size_flags(SIZE_EXPAND_FILL);
+		build_tabs->set_tabs_visible(false);
+		build_tabs->connect("tab_changed", this, "_build_tab_changed");
+		hsc->add_child(build_tabs);
+	}
+}
+
+MonoBottomPanel::~MonoBottomPanel() {
+
+	singleton = NULL;
+}
+
+void MonoBuildTab::_load_issues_from_file(const String &p_csv_file) {
+
+	FileAccessRef f = FileAccess::open(p_csv_file, FileAccess::READ);
+
+	if (!f)
+		return;
+
+	while (!f->eof_reached()) {
+		Vector<String> csv_line = f->get_csv_line();
+
+		if (csv_line.size() == 1 && csv_line[0].empty())
+			return;
+
+		ERR_CONTINUE(csv_line.size() != 7);
+
+		BuildIssue issue;
+		issue.warning = csv_line[0] == "warning";
+		issue.file = csv_line[1];
+		issue.line = csv_line[2].to_int();
+		issue.column = csv_line[3].to_int();
+		issue.code = csv_line[4];
+		issue.message = csv_line[5];
+		issue.project_file = csv_line[6];
+
+		if (issue.warning)
+			warning_count += 1;
+		else
+			error_count += 1;
+
+		issues.push_back(issue);
+	}
+}
+
+void MonoBuildTab::_update_issues_list() {
+
+	issues_list->clear();
+
+	Ref<Texture> warning_icon = get_icon("Warning", "EditorIcons");
+	Ref<Texture> error_icon = get_icon("Error", "EditorIcons");
+
+	for (int i = 0; i < issues.size(); i++) {
+
+		const BuildIssue &issue = issues[i];
+
+		if (!(issue.warning ? warnings_visible : errors_visible))
+			continue;
+
+		String tooltip;
+		tooltip += String("Message: ") + issue.message;
+		tooltip += String("\nCode: ") + issue.code;
+		tooltip += String("\nType: ") + (issue.warning ? "warning" : "error");
+
+		String text;
+
+		if (issue.file.length()) {
+			String sline = String::num_int64(issue.line);
+			String scolumn = String::num_int64(issue.column);
+
+			text += issue.file + "(";
+			text += sline + ",";
+			text += scolumn + "): ";
+
+			tooltip += "\nFile: " + issue.file;
+			tooltip += "\nLine: " + sline;
+			tooltip += "\nColumn: " + scolumn;
+		}
+
+		if (issue.project_file.length()) {
+			tooltip += "\nProject: " + issue.project_file;
+		}
+
+		text += issue.message;
+
+		int line_break_idx = text.find("\n");
+		issues_list->add_item(line_break_idx == -1 ? text : text.substr(0, line_break_idx),
+				issue.warning ? warning_icon : error_icon);
+		int index = issues_list->get_item_count() - 1;
+		issues_list->set_item_tooltip(index, tooltip);
+		issues_list->set_item_metadata(index, i);
+	}
+}
+
+Ref<Texture> MonoBuildTab::get_icon_texture() const {
+
+	// FIXME these icons were removed... find something better
+
+	if (build_exited) {
+		if (build_result == RESULT_ERROR) {
+			return get_icon("DependencyChangedHl", "EditorIcons");
+		} else {
+			return get_icon("DependencyOkHl", "EditorIcons");
+		}
+	} else {
+		return get_icon("GraphTime", "EditorIcons");
+	}
+}
+
+MonoBuildInfo MonoBuildTab::get_build_info() {
+
+	return build_info;
+}
+
+void MonoBuildTab::on_build_start() {
+
+	build_exited = false;
+
+	issues.clear();
+	warning_count = 0;
+	error_count = 0;
+	_update_issues_list();
+
+	MonoBottomPanel::get_singleton()->raise_build_tab(this);
+}
+
+void MonoBuildTab::on_build_exit(BuildResult result) {
+
+	build_exited = true;
+	build_result = result;
+
+	_load_issues_from_file(logs_dir.plus_file("msbuild_issues.csv"));
+	_update_issues_list();
+
+	MonoBottomPanel::get_singleton()->raise_build_tab(this);
+}
+
+void MonoBuildTab::on_build_exec_failed(const String &p_cause, const String &p_detailed) {
+
+	build_exited = true;
+	build_result = RESULT_ERROR;
+
+	issues_list->clear();
+
+	String tooltip;
+
+	tooltip += "Message: " + (p_detailed.length() ? p_detailed : p_cause);
+	tooltip += "\nType: error";
+
+	int line_break_idx = p_cause.find("\n");
+	issues_list->add_item(line_break_idx == -1 ? p_cause : p_cause.substr(0, line_break_idx),
+			get_icon("Error", "EditorIcons"));
+	int index = issues_list->get_item_count() - 1;
+	issues_list->set_item_tooltip(index, tooltip);
+
+	MonoBottomPanel::get_singleton()->raise_build_tab(this);
+}
+
+void MonoBuildTab::restart_build() {
+
+	ERR_FAIL_COND(!build_exited);
+	GodotSharpBuilds::get_singleton()->restart_build(this);
+}
+
+void MonoBuildTab::stop_build() {
+
+	ERR_FAIL_COND(build_exited);
+	GodotSharpBuilds::get_singleton()->stop_build(this);
+}
+
+void MonoBuildTab::_issue_activated(int p_idx) {
+
+	ERR_FAIL_INDEX(p_idx, issues.size());
+
+	const BuildIssue &issue = issues[p_idx];
+
+	if (issue.project_file.empty() && issue.file.empty())
+		return;
+
+	String project_dir = issue.project_file.length() ? issue.project_file.get_base_dir() : build_info.solution.get_base_dir();
+
+	String file = project_dir.simplify_path().plus_file(issue.file.simplify_path());
+
+	if (!FileAccess::exists(file))
+		return;
+
+	file = ProjectSettings::get_singleton()->localize_path(file);
+
+	if (file.begins_with("res://")) {
+		Ref<Script> script = ResourceLoader::load(file, CSharpLanguage::get_singleton()->get_type());
+
+		if (script.is_valid() && ScriptEditor::get_singleton()->edit(script, issue.line, issue.column)) {
+			EditorNode::get_singleton()->call("_editor_select", EditorNode::EDITOR_SCRIPT);
+		}
+	}
+}
+
+void MonoBuildTab::_bind_methods() {
+
+	ClassDB::bind_method("_issue_activated", &MonoBuildTab::_issue_activated);
+}
+
+MonoBuildTab::MonoBuildTab(const MonoBuildInfo &p_build_info, const String &p_logs_dir) {
+
+	build_info = p_build_info;
+	logs_dir = p_logs_dir;
+
+	build_exited = false;
+
+	issues_list = memnew(ItemList);
+	issues_list->set_v_size_flags(SIZE_EXPAND_FILL);
+	issues_list->connect("item_activated", this, "_issue_activated");
+	add_child(issues_list);
+
+	error_count = 0;
+	warning_count = 0;
+
+	errors_visible = true;
+	warnings_visible = true;
+}
diff --git a/modules/mono/editor/mono_bottom_panel.h b/modules/mono/editor/mono_bottom_panel.h
new file mode 100644
index 00000000000..909fa4b3855
--- /dev/null
+++ b/modules/mono/editor/mono_bottom_panel.h
@@ -0,0 +1,145 @@
+/*************************************************************************/
+/*  mono_bottom_panel.h                                                  */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2017 Godot Engine contributors (cf. AUTHORS.md)    */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+#ifndef MONO_BOTTOM_PANEL_H
+#define MONO_BOTTOM_PANEL_H
+
+#include "editor/editor_node.h"
+#include "scene/gui/control.h"
+
+#include "mono_build_info.h"
+
+class MonoBuildTab;
+
+class MonoBottomPanel : public VBoxContainer {
+
+	GDCLASS(MonoBottomPanel, VBoxContainer)
+
+	EditorNode *editor;
+
+	TabContainer *panel_tabs;
+
+	VBoxContainer *panel_builds_tab;
+
+	ItemList *build_tabs_list;
+	TabContainer *build_tabs;
+
+	Button *warnings_btn;
+	Button *errors_btn;
+
+	void _update_build_tabs_list();
+
+	void _build_tab_item_selected(int p_idx);
+	void _build_tab_changed(int p_idx);
+
+	void _warnings_toggled(bool p_pressed);
+	void _errors_toggled(bool p_pressed);
+
+	static MonoBottomPanel *singleton;
+
+protected:
+	void _notification(int p_what);
+
+	static void _bind_methods();
+
+public:
+	_FORCE_INLINE_ static MonoBottomPanel *get_singleton() { return singleton; }
+
+	void add_build_tab(MonoBuildTab *p_build_tab);
+	void raise_build_tab(MonoBuildTab *p_build_tab);
+
+	void show_build_tab();
+
+	MonoBottomPanel(EditorNode *p_editor = NULL);
+	~MonoBottomPanel();
+};
+
+class MonoBuildTab : public VBoxContainer {
+
+	GDCLASS(MonoBuildTab, VBoxContainer)
+
+public:
+	enum BuildResult {
+		RESULT_ERROR,
+		RESULT_SUCCESS
+	};
+
+	struct BuildIssue {
+		bool warning;
+		String file;
+		int line;
+		int column;
+		String code;
+		String message;
+		String project_file;
+	};
+
+private:
+	friend class MonoBottomPanel;
+
+	bool build_exited;
+	BuildResult build_result;
+
+	Vector<BuildIssue> issues;
+	ItemList *issues_list;
+
+	int error_count;
+	int warning_count;
+
+	bool errors_visible;
+	bool warnings_visible;
+
+	String logs_dir;
+
+	MonoBuildInfo build_info;
+
+	void _load_issues_from_file(const String &p_csv_file);
+	void _update_issues_list();
+
+	void _issue_activated(int p_idx);
+
+protected:
+	static void _bind_methods();
+
+public:
+	Ref<Texture> get_icon_texture() const;
+
+	MonoBuildInfo get_build_info();
+
+	void on_build_start();
+	void on_build_exit(BuildResult result);
+	void on_build_exec_failed(const String &p_cause, const String &p_detailed = String());
+
+	void restart_build();
+	void stop_build();
+
+	MonoBuildTab(const MonoBuildInfo &p_build_info, const String &p_logs_dir);
+};
+
+#endif // MONO_BOTTOM_PANEL_H
diff --git a/modules/mono/editor/mono_build_info.h b/modules/mono/editor/mono_build_info.h
new file mode 100644
index 00000000000..f3b3e43b6d6
--- /dev/null
+++ b/modules/mono/editor/mono_build_info.h
@@ -0,0 +1,64 @@
+/*************************************************************************/
+/*  mono_build_info.h                                                    */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2017 Godot Engine contributors (cf. AUTHORS.md)    */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+#ifndef MONO_BUILD_INFO_H
+#define MONO_BUILD_INFO_H
+
+#include "../mono_gd/gd_mono_utils.h"
+
+struct MonoBuildInfo {
+
+	struct Hasher {
+		static _FORCE_INLINE_ uint32_t hash(const MonoBuildInfo &p_key) {
+			uint32_t hash = 0;
+
+			GDMonoUtils::hash_combine(hash, p_key.solution.hash());
+			GDMonoUtils::hash_combine(hash, p_key.configuration.hash());
+
+			return hash;
+		}
+	};
+
+	String solution;
+	String configuration;
+	Vector<String> custom_props;
+
+	MonoBuildInfo() {}
+
+	MonoBuildInfo(const String &p_solution, const String &p_config) {
+		solution = p_solution;
+		configuration = p_config;
+	}
+
+	bool operator==(const MonoBuildInfo &p_b) const {
+		return p_b.solution == solution && p_b.configuration == configuration;
+	}
+};
+
+#endif // MONO_BUILD_INFO_H
diff --git a/modules/mono/editor/monodevelop_instance.cpp b/modules/mono/editor/monodevelop_instance.cpp
new file mode 100644
index 00000000000..a34d82ffcb7
--- /dev/null
+++ b/modules/mono/editor/monodevelop_instance.cpp
@@ -0,0 +1,81 @@
+/*************************************************************************/
+/*  monodevelop_instance.cpp                                             */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2017 Godot Engine contributors (cf. AUTHORS.md)    */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+#include "monodevelop_instance.h"
+
+#include "../mono_gd/gd_mono.h"
+#include "../mono_gd/gd_mono_class.h"
+
+void MonoDevelopInstance::execute(const Vector<String> &p_files) {
+
+	ERR_FAIL_NULL(execute_method);
+	ERR_FAIL_COND(gc_handle.is_null());
+
+	MonoObject *ex = NULL;
+
+	Variant files = p_files;
+	const Variant *args[1] = { &files };
+	execute_method->invoke(gc_handle->get_target(), args, &ex);
+
+	if (ex) {
+		mono_print_unhandled_exception(ex);
+		ERR_FAIL();
+	}
+}
+
+void MonoDevelopInstance::execute(const String &p_file) {
+
+	Vector<String> files;
+	files.push_back(p_file);
+	execute(files);
+}
+
+MonoDevelopInstance::MonoDevelopInstance(const String &p_solution) {
+
+	_GDMONO_SCOPE_DOMAIN_(TOOLS_DOMAIN)
+
+	GDMonoClass *klass = GDMono::get_singleton()->get_editor_tools_assembly()->get_class("GodotSharpTools.Editor", "MonoDevelopInstance");
+
+	MonoObject *obj = mono_object_new(TOOLS_DOMAIN, klass->get_raw());
+
+	GDMonoMethod *ctor = klass->get_method(".ctor", 1);
+	MonoObject *ex = NULL;
+
+	Variant solution = p_solution;
+	const Variant *args[1] = { &solution };
+	ctor->invoke(obj, args, &ex);
+
+	if (ex) {
+		mono_print_unhandled_exception(ex);
+		ERR_FAIL();
+	}
+
+	gc_handle = MonoGCHandle::create_strong(obj);
+	execute_method = klass->get_method("Execute", 1);
+}
diff --git a/modules/mono/editor/monodevelop_instance.h b/modules/mono/editor/monodevelop_instance.h
new file mode 100644
index 00000000000..9eb154eba16
--- /dev/null
+++ b/modules/mono/editor/monodevelop_instance.h
@@ -0,0 +1,50 @@
+/*************************************************************************/
+/*  monodevelop_instance.h                                               */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2017 Godot Engine contributors (cf. AUTHORS.md)    */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+#ifndef MONODEVELOP_INSTANCE_H
+#define MONODEVELOP_INSTANCE_H
+
+#include "reference.h"
+
+#include "../mono_gc_handle.h"
+#include "../mono_gd/gd_mono_method.h"
+
+class MonoDevelopInstance {
+
+	Ref<MonoGCHandle> gc_handle;
+	GDMonoMethod *execute_method;
+
+public:
+	void execute(const Vector<String> &p_files);
+	void execute(const String &p_files);
+
+	MonoDevelopInstance(const String &p_solution);
+};
+
+#endif // MONODEVELOP_INSTANCE_H
diff --git a/modules/mono/editor/net_solution.cpp b/modules/mono/editor/net_solution.cpp
new file mode 100644
index 00000000000..fa60c310dba
--- /dev/null
+++ b/modules/mono/editor/net_solution.cpp
@@ -0,0 +1,130 @@
+/*************************************************************************/
+/*  net_solution.cpp                                                     */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2017 Godot Engine contributors (cf. AUTHORS.md)    */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+#include "net_solution.h"
+
+#include "os/dir_access.h"
+#include "os/file_access.h"
+
+#include "../utils/path_utils.h"
+#include "../utils/string_utils.h"
+#include "csharp_project.h"
+
+#define SOLUTION_TEMPLATE                                             \
+	"Microsoft Visual Studio Solution File, Format Version 12.00\n"   \
+	"# Visual Studio 2012\n"                                          \
+	"%0\n"                                                            \
+	"Global\n"                                                        \
+	"\tGlobalSection(SolutionConfigurationPlatforms) = preSolution\n" \
+	"%1\n"                                                            \
+	"\tEndGlobalSection\n"                                            \
+	"\tGlobalSection(ProjectConfigurationPlatforms) = postSolution\n" \
+	"%2\n"                                                            \
+	"\tEndGlobalSection\n"                                            \
+	"EndGlobal\n"
+
+#define PROJECT_DECLARATION "Project(\"{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}\") = \"%0\", \"%1\", \"{%2}\"\nEndProject"
+
+#define SOLUTION_PLATFORMS_CONFIG "\t\%0|Any CPU = %0|Any CPU"
+
+#define PROJECT_PLATFORMS_CONFIG                   \
+	"\t\t{%0}.%1|Any CPU.ActiveCfg = %1|Any CPU\n" \
+	"\t\t{%0}.%1|Any CPU.Build.0 = %1|Any CPU"
+
+void NETSolution::add_new_project(const String &p_name, const String &p_guid, const Vector<String> &p_extra_configs) {
+	if (projects.has(p_name))
+		WARN_PRINT("Overriding existing project.");
+
+	ProjectInfo procinfo;
+	procinfo.guid = p_guid;
+
+	procinfo.configs.push_back("Debug");
+	procinfo.configs.push_back("Release");
+
+	for (int i = 0; i < p_extra_configs.size(); i++) {
+		procinfo.configs.push_back(p_extra_configs[i]);
+	}
+
+	projects[p_name] = procinfo;
+}
+
+Error NETSolution::save() {
+	bool dir_exists = DirAccess::exists(path);
+	ERR_EXPLAIN("The directory does not exist.");
+	ERR_FAIL_COND_V(!dir_exists, ERR_FILE_BAD_PATH);
+
+	String projs_decl;
+	String sln_platform_cfg;
+	String proj_platform_cfg;
+
+	for (Map<String, ProjectInfo>::Element *E = projects.front(); E; E = E->next()) {
+		const String &name = E->key();
+		const ProjectInfo &procinfo = E->value();
+
+		projs_decl += sformat(PROJECT_DECLARATION, name, name + ".csproj", procinfo.guid);
+
+		for (int i = 0; i < procinfo.configs.size(); i++) {
+			const String &config = procinfo.configs[i];
+
+			if (i != 0) {
+				sln_platform_cfg += "\n";
+				proj_platform_cfg += "\n";
+			}
+
+			sln_platform_cfg += sformat(SOLUTION_PLATFORMS_CONFIG, config);
+			proj_platform_cfg += sformat(PROJECT_PLATFORMS_CONFIG, procinfo.guid, config);
+		}
+	}
+
+	String content = sformat(SOLUTION_TEMPLATE, projs_decl, sln_platform_cfg, proj_platform_cfg);
+
+	FileAccessRef file = FileAccess::open(path_join(path, name + ".sln"), FileAccess::WRITE);
+	ERR_FAIL_COND_V(!file, ERR_FILE_CANT_WRITE);
+	file->store_string(content);
+	file->close();
+
+	return OK;
+}
+
+bool NETSolution::set_path(const String &p_existing_path) {
+	if (p_existing_path.is_abs_path()) {
+		path = p_existing_path;
+	} else {
+		String abspath;
+		if (!rel_path_to_abs(p_existing_path, abspath))
+			return false;
+		path = abspath;
+	}
+
+	return true;
+}
+
+NETSolution::NETSolution(const String &p_name) {
+	name = p_name;
+}
diff --git a/modules/mono/editor/net_solution.h b/modules/mono/editor/net_solution.h
new file mode 100644
index 00000000000..d7ccebb7df2
--- /dev/null
+++ b/modules/mono/editor/net_solution.h
@@ -0,0 +1,57 @@
+/*************************************************************************/
+/*  net_solution.h                                                       */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2017 Godot Engine contributors (cf. AUTHORS.md)    */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+#ifndef NET_SOLUTION_H
+#define NET_SOLUTION_H
+
+#include "map.h"
+#include "ustring.h"
+
+struct NETSolution {
+	String name;
+
+	void add_new_project(const String &p_name, const String &p_guid, const Vector<String> &p_extra_configs = Vector<String>());
+
+	Error save();
+
+	bool set_path(const String &p_existing_path);
+
+	NETSolution(const String &p_name);
+
+private:
+	struct ProjectInfo {
+		String guid;
+		Vector<String> configs;
+	};
+
+	String path;
+	Map<String, ProjectInfo> projects;
+};
+
+#endif // NET_SOLUTION_H
diff --git a/modules/mono/glue/cs_files/Basis.cs b/modules/mono/glue/cs_files/Basis.cs
new file mode 100644
index 00000000000..6a73ebd554e
--- /dev/null
+++ b/modules/mono/glue/cs_files/Basis.cs
@@ -0,0 +1,475 @@
+using System;
+using System.Runtime.InteropServices;
+
+namespace Godot
+{
+    [StructLayout(LayoutKind.Sequential)]
+    public struct Basis : IEquatable<Basis>
+    {
+        private static readonly Basis identity = new Basis
+        (
+            new Vector3(1f, 0f, 0f),
+            new Vector3(0f, 1f, 0f),
+            new Vector3(0f, 0f, 1f)
+        );
+
+        private static readonly Basis[] orthoBases = new Basis[24]
+        {
+            new Basis(1f, 0f, 0f, 0f, 1f, 0f, 0f, 0f, 1f),
+            new Basis(0f, -1f, 0f, 1f, 0f, 0f, 0f, 0f, 1f),
+            new Basis(-1f, 0f, 0f, 0f, -1f, 0f, 0f, 0f, 1f),
+            new Basis(0f, 1f, 0f, -1f, 0f, 0f, 0f, 0f, 1f),
+            new Basis(1f, 0f, 0f, 0f, 0f, -1f, 0f, 1f, 0f),
+            new Basis(0f, 0f, 1f, 1f, 0f, 0f, 0f, 1f, 0f),
+            new Basis(-1f, 0f, 0f, 0f, 0f, 1f, 0f, 1f, 0f),
+            new Basis(0f, 0f, -1f, -1f, 0f, 0f, 0f, 1f, 0f),
+            new Basis(1f, 0f, 0f, 0f, -1f, 0f, 0f, 0f, -1f),
+            new Basis(0f, 1f, 0f, 1f, 0f, 0f, 0f, 0f, -1f),
+            new Basis(-1f, 0f, 0f, 0f, 1f, 0f, 0f, 0f, -1f),
+            new Basis(0f, -1f, 0f, -1f, 0f, 0f, 0f, 0f, -1f),
+            new Basis(1f, 0f, 0f, 0f, 0f, 1f, 0f, -1f, 0f),
+            new Basis(0f, 0f, -1f, 1f, 0f, 0f, 0f, -1f, 0f),
+            new Basis(-1f, 0f, 0f, 0f, 0f, -1f, 0f, -1f, 0f),
+            new Basis(0f, 0f, 1f, -1f, 0f, 0f, 0f, -1f, 0f),
+            new Basis(0f, 0f, 1f, 0f, 1f, 0f, -1f, 0f, 0f),
+            new Basis(0f, -1f, 0f, 0f, 0f, 1f, -1f, 0f, 0f),
+            new Basis(0f, 0f, -1f, 0f, -1f, 0f, -1f, 0f, 0f),
+            new Basis(0f, 1f, 0f, 0f, 0f, -1f, -1f, 0f, 0f),
+            new Basis(0f, 0f, 1f, 0f, -1f, 0f, 1f, 0f, 0f),
+            new Basis(0f, 1f, 0f, 0f, 0f, 1f, 1f, 0f, 0f),
+            new Basis(0f, 0f, -1f, 0f, 1f, 0f, 1f, 0f, 0f),
+            new Basis(0f, -1f, 0f, 0f, 0f, -1f, 1f, 0f, 0f)
+        };
+
+        public Vector3 x;
+        public Vector3 y;
+        public Vector3 z;
+
+        public static Basis Identity
+        {
+            get { return identity; }
+        }
+
+        public Vector3 Scale
+        {
+            get
+            {
+                return new Vector3
+                (
+                    new Vector3(this[0, 0], this[1, 0], this[2, 0]).length(),
+                    new Vector3(this[0, 1], this[1, 1], this[2, 1]).length(),
+                    new Vector3(this[0, 2], this[1, 2], this[2, 2]).length()
+                );
+            }
+        }
+
+        public Vector3 this[int index]
+        {
+            get
+            {
+                switch (index)
+                {
+                    case 0:
+                        return x;
+                    case 1:
+                        return y;
+                    case 2:
+                        return z;
+                    default:
+                        throw new IndexOutOfRangeException();
+                }
+            }
+            set
+            {
+                switch (index)
+                {
+                    case 0:
+                        x = value;
+                        return;
+                    case 1:
+                        y = value;
+                        return;
+                    case 2:
+                        z = value;
+                        return;
+                    default:
+                        throw new IndexOutOfRangeException();
+                }
+            }
+        }
+
+        public float this[int index, int axis]
+        {
+            get
+            {
+                switch (index)
+                {
+                    case 0:
+                        return x[axis];
+                    case 1:
+                        return y[axis];
+                    case 2:
+                        return z[axis];
+                    default:
+                        throw new IndexOutOfRangeException();
+                }
+            }
+            set
+            {
+                switch (index)
+                {
+                    case 0:
+                        x[axis] = value;
+                        return;
+                    case 1:
+                        y[axis] = value;
+                        return;
+                    case 2:
+                        z[axis] = value;
+                        return;
+                    default:
+                        throw new IndexOutOfRangeException();
+                }
+            }
+        }
+
+        internal static Basis create_from_axes(Vector3 xAxis, Vector3 yAxis, Vector3 zAxis)
+        {
+            return new Basis
+            (
+                new Vector3(xAxis.x, yAxis.x, zAxis.x),
+                new Vector3(xAxis.y, yAxis.y, zAxis.y),
+                new Vector3(xAxis.z, yAxis.z, zAxis.z)
+            );
+        }
+
+        public float determinant()
+        {
+            return this[0, 0] * (this[1, 1] * this[2, 2] - this[2, 1] * this[1, 2]) -
+                    this[1, 0] * (this[0, 1] * this[2, 2] - this[2, 1] * this[0, 2]) +
+                    this[2, 0] * (this[0, 1] * this[1, 2] - this[1, 1] * this[0, 2]);
+        }
+
+        public Vector3 get_axis(int axis)
+        {
+            return new Vector3(this[0, axis], this[1, axis], this[2, axis]);
+        }
+
+        public Vector3 get_euler()
+        {
+            Basis m = this.orthonormalized();
+
+            Vector3 euler;
+
+            euler.y = Mathf.asin(m.x[2]);
+
+            if (euler.y < Mathf.PI * 0.5f)
+            {
+                if (euler.y > -Mathf.PI * 0.5f)
+                {
+                    euler.x = Mathf.atan2(-m.y[2], m.z[2]);
+                    euler.z = Mathf.atan2(-m.x[1], m.x[0]);
+                }
+                else
+                {
+                    euler.z = 0.0f;
+                    euler.x = euler.z - Mathf.atan2(m.y[0], m.y[1]);
+                }
+            }
+            else
+            {
+                euler.z = 0f;
+                euler.x = Mathf.atan2(m.x[1], m.y[1]) - euler.z;
+            }
+
+            return euler;
+        }
+
+        public int get_orthogonal_index()
+        {
+            Basis orth = this;
+
+            for (int i = 0; i < 3; i++)
+            {
+                for (int j = 0; j < 3; j++)
+                {
+                    float v = orth[i, j];
+
+                    if (v > 0.5f)
+                        v = 1.0f;
+                    else if (v < -0.5f)
+                        v = -1.0f;
+                    else
+                        v = 0f;
+
+                    orth[i, j] = v;
+                }
+            }
+
+            for (int i = 0; i < 24; i++)
+            {
+                if (orthoBases[i] == orth)
+                    return i;
+            }
+
+            return 0;
+        }
+
+        public Basis inverse()
+        {
+            Basis inv = this;
+
+            float[] co = new float[3]
+            {
+                inv[1, 1] * inv[2, 2] - inv[1, 2] * inv[2, 1],
+                inv[1, 2] * inv[2, 0] - inv[1, 0] * inv[2, 2],
+                inv[1, 0] * inv[2, 1] - inv[1, 1] * inv[2, 0]
+            };
+
+            float det = inv[0, 0] * co[0] + inv[0, 1] * co[1] + inv[0, 2] * co[2];
+
+            if (det == 0)
+            {
+                return new Basis
+                (
+                    float.NaN, float.NaN, float.NaN,
+                    float.NaN, float.NaN, float.NaN,
+                    float.NaN, float.NaN, float.NaN
+                );
+            }
+
+            float s = 1.0f / det;
+
+            inv = new Basis
+            (
+                co[0] * s,
+                inv[0, 2] * inv[2, 1] - inv[0, 1] * inv[2, 2] * s,
+                inv[0, 1] * inv[1, 2] - inv[0, 2] * inv[1, 1] * s,
+                co[1] * s,
+                inv[0, 0] * inv[2, 2] - inv[0, 2] * inv[2, 0] * s,
+                inv[0, 2] * inv[1, 0] - inv[0, 0] * inv[1, 2] * s,
+                co[2] * s,
+                inv[0, 1] * inv[2, 0] - inv[0, 0] * inv[2, 1] * s,
+                inv[0, 0] * inv[1, 1] - inv[0, 1] * inv[1, 0] * s
+            );
+
+            return inv;
+        }
+
+        public Basis orthonormalized()
+        {
+            Vector3 xAxis = get_axis(0);
+            Vector3 yAxis = get_axis(1);
+            Vector3 zAxis = get_axis(2);
+
+            xAxis.normalize();
+            yAxis = (yAxis - xAxis * (xAxis.dot(yAxis)));
+            yAxis.normalize();
+            zAxis = (zAxis - xAxis * (xAxis.dot(zAxis)) - yAxis * (yAxis.dot(zAxis)));
+            zAxis.normalize();
+
+            return Basis.create_from_axes(xAxis, yAxis, zAxis);
+        }
+
+        public Basis rotated(Vector3 axis, float phi)
+        {
+            return this * new Basis(axis, phi);
+        }
+
+        public Basis scaled(Vector3 scale)
+        {
+            Basis m = this;
+
+            m[0, 0] *= scale.x;
+            m[1, 0] *= scale.x;
+            m[2, 0] *= scale.x;
+            m[0, 1] *= scale.y;
+            m[1, 1] *= scale.y;
+            m[2, 1] *= scale.y;
+            m[0, 2] *= scale.z;
+            m[1, 2] *= scale.z;
+            m[2, 2] *= scale.z;
+
+            return m;
+        }
+
+        public float tdotx(Vector3 with)
+        {
+            return this[0, 0] * with[0] + this[1, 0] * with[1] + this[2, 0] * with[2];
+        }
+
+        public float tdoty(Vector3 with)
+        {
+            return this[0, 1] * with[0] + this[1, 1] * with[1] + this[2, 1] * with[2];
+        }
+
+        public float tdotz(Vector3 with)
+        {
+            return this[0, 2] * with[0] + this[1, 2] * with[1] + this[2, 2] * with[2];
+        }
+
+        public Basis transposed()
+        {
+            Basis tr = this;
+
+            float temp = this[0, 1];
+            this[0, 1] = this[1, 0];
+            this[1, 0] = temp;
+
+            temp = this[0, 2];
+            this[0, 2] = this[2, 0];
+            this[2, 0] = temp;
+
+            temp = this[1, 2];
+            this[1, 2] = this[2, 1];
+            this[2, 1] = temp;
+
+            return tr;
+        }
+
+        public Vector3 xform(Vector3 v)
+        {
+            return new Vector3
+            (
+                this[0].dot(v),
+                this[1].dot(v),
+                this[2].dot(v)
+            );
+        }
+
+        public Vector3 xform_inv(Vector3 v)
+        {
+            return new Vector3
+            (
+                (this[0, 0] * v.x) + (this[1, 0] * v.y) + (this[2, 0] * v.z),
+                (this[0, 1] * v.x) + (this[1, 1] * v.y) + (this[2, 1] * v.z),
+                (this[0, 2] * v.x) + (this[1, 2] * v.y) + (this[2, 2] * v.z)
+            );
+        }
+
+        public Basis(Quat quat)
+        {
+            float s = 2.0f / quat.length_squared();
+
+            float xs = quat.x * s;
+            float ys = quat.y * s;
+            float zs = quat.z * s;
+            float wx = quat.w * xs;
+            float wy = quat.w * ys;
+            float wz = quat.w * zs;
+            float xx = quat.x * xs;
+            float xy = quat.x * ys;
+            float xz = quat.x * zs;
+            float yy = quat.y * ys;
+            float yz = quat.y * zs;
+            float zz = quat.z * zs;
+
+            this.x = new Vector3(1.0f - (yy + zz), xy - wz, xz + wy);
+            this.y = new Vector3(xy + wz, 1.0f - (xx + zz), yz - wx);
+            this.z = new Vector3(xz - wy, yz + wx, 1.0f - (xx + yy));
+        }
+
+        public Basis(Vector3 axis, float phi)
+        {
+            Vector3 axis_sq = new Vector3(axis.x * axis.x, axis.y * axis.y, axis.z * axis.z);
+
+            float cosine = Mathf.cos(phi);
+            float sine = Mathf.sin(phi);
+
+            this.x = new Vector3
+            (
+                axis_sq.x + cosine * (1.0f - axis_sq.x),
+                axis.x * axis.y * (1.0f - cosine) - axis.z * sine,
+                axis.z * axis.x * (1.0f - cosine) + axis.y * sine
+            );
+
+            this.y = new Vector3
+            (
+                axis.x * axis.y * (1.0f - cosine) + axis.z * sine,
+                axis_sq.y + cosine * (1.0f - axis_sq.y),
+                axis.y * axis.z * (1.0f - cosine) - axis.x * sine
+            );
+
+            this.z = new Vector3
+            (
+                axis.z * axis.x * (1.0f - cosine) - axis.y * sine,
+                axis.y * axis.z * (1.0f - cosine) + axis.x * sine,
+                axis_sq.z + cosine * (1.0f - axis_sq.z)
+            );
+        }
+
+        public Basis(Vector3 xAxis, Vector3 yAxis, Vector3 zAxis)
+        {
+            this.x = xAxis;
+            this.y = yAxis;
+            this.z = zAxis;
+        }
+
+        public Basis(float xx, float xy, float xz, float yx, float yy, float yz, float zx, float zy, float zz)
+        {
+            this.x = new Vector3(xx, xy, xz);
+            this.y = new Vector3(yx, yy, yz);
+            this.z = new Vector3(zx, zy, zz);
+        }
+
+        public static Basis operator *(Basis left, Basis right)
+        {
+            return new Basis
+            (
+                right.tdotx(left[0]), right.tdoty(left[0]), right.tdotz(left[0]),
+                right.tdotx(left[1]), right.tdoty(left[1]), right.tdotz(left[1]),
+                right.tdotx(left[2]), right.tdoty(left[2]), right.tdotz(left[2])
+            );
+        }
+
+        public static bool operator ==(Basis left, Basis right)
+        {
+            return left.Equals(right);
+        }
+
+        public static bool operator !=(Basis left, Basis right)
+        {
+            return !left.Equals(right);
+        }
+
+        public override bool Equals(object obj)
+        {
+            if (obj is Basis)
+            {
+                return Equals((Basis)obj);
+            }
+
+            return false;
+        }
+
+        public bool Equals(Basis other)
+        {
+            return x.Equals(other.x) && y.Equals(other.y) && z.Equals(other.z);
+        }
+
+        public override int GetHashCode()
+        {
+            return x.GetHashCode() ^ y.GetHashCode() ^ z.GetHashCode();
+        }
+
+        public override string ToString()
+        {
+            return String.Format("({0}, {1}, {2})", new object[]
+            {
+                this.x.ToString(),
+                this.y.ToString(),
+                this.z.ToString()
+            });
+        }
+
+        public string ToString(string format)
+        {
+            return String.Format("({0}, {1}, {2})", new object[]
+            {
+                this.x.ToString(format),
+                this.y.ToString(format),
+                this.z.ToString(format)
+            });
+        }
+    }
+}
diff --git a/modules/mono/glue/cs_files/Color.cs b/modules/mono/glue/cs_files/Color.cs
new file mode 100644
index 00000000000..df88a46832d
--- /dev/null
+++ b/modules/mono/glue/cs_files/Color.cs
@@ -0,0 +1,590 @@
+using System;
+
+namespace Godot
+{
+    public struct Color : IEquatable<Color>
+    {
+        public float r;
+        public float g;
+        public float b;
+        public float a;
+
+        public int r8
+        {
+            get
+            {
+                return (int)(r * 255.0f);
+            }
+        }
+
+        public int g8
+        {
+            get
+            {
+                return (int)(g * 255.0f);
+            }
+        }
+
+        public int b8
+        {
+            get
+            {
+                return (int)(b * 255.0f);
+            }
+        }
+
+        public int a8
+        {
+            get
+            {
+                return (int)(a * 255.0f);
+            }
+        }
+
+        public float h
+        {
+            get
+            {
+                float max = Mathf.max(r, Mathf.max(g, b));
+                float min = Mathf.min(r, Mathf.min(g, b));
+
+                float delta = max - min;
+
+                if (delta == 0)
+                    return 0;
+
+                float h;
+
+                if (r == max)
+                    h = (g - b) / delta; // Between yellow & magenta
+                else if (g == max)
+                    h = 2 + (b - r) / delta; // Between cyan & yellow
+                else
+                    h = 4 + (r - g) / delta; // Between magenta & cyan
+
+                h /= 6.0f;
+
+                if (h < 0)
+                    h += 1.0f;
+
+                return h;
+            }
+            set
+            {
+                this = from_hsv(value, s, v);
+            }
+        }
+
+        public float s
+        {
+            get
+            {
+                float max = Mathf.max(r, Mathf.max(g, b));
+                float min = Mathf.min(r, Mathf.min(g, b));
+
+                float delta = max - min;
+
+                return max != 0 ? delta / max : 0;
+            }
+            set
+            {
+                this = from_hsv(h, value, v);
+            }
+        }
+
+        public float v
+        {
+            get
+            {
+                return Mathf.max(r, Mathf.max(g, b));
+            }
+            set
+            {
+                this = from_hsv(h, s, value);
+            }
+        }
+
+        private static readonly Color black = new Color(0f, 0f, 0f, 1.0f);
+
+        public Color Black
+        {
+            get
+            {
+                return black;
+            }
+        }
+
+        public float this [int index]
+        {
+            get
+            {
+                switch (index)
+                {
+                    case 0:
+                        return r;
+                    case 1:
+                        return g;
+                    case 2:
+                        return b;
+                    case 3:
+                        return a;
+                    default:
+                        throw new IndexOutOfRangeException();
+                }
+            }
+            set
+            {
+                switch (index)
+                {
+                    case 0:
+                        r = value;
+                        return;
+                    case 1:
+                        g = value;
+                        return;
+                    case 2:
+                        b = value;
+                        return;
+                    case 3:
+                        a = value;
+                        return;
+                    default:
+                        throw new IndexOutOfRangeException();
+                }
+            }
+        }
+
+        public static void to_hsv(Color color, out float hue, out float saturation, out float value)
+        {
+            int max = Mathf.max(color.r8, Mathf.max(color.g8, color.b8));
+            int min = Mathf.min(color.r8, Mathf.min(color.g8, color.b8));
+
+            float delta = max - min;
+
+            if (delta == 0)
+            {
+                hue = 0;
+            }
+            else
+            {
+                if (color.r == max)
+                    hue = (color.g - color.b) / delta; // Between yellow & magenta
+                else if (color.g == max)
+                    hue = 2 + (color.b - color.r) / delta; // Between cyan & yellow
+                else
+                    hue = 4 + (color.r - color.g) / delta; // Between magenta & cyan
+
+                hue /= 6.0f;
+
+                if (hue < 0)
+                    hue += 1.0f;
+            }
+
+            saturation = (max == 0) ? 0 : 1f - (1f * min / max);
+            value = max / 255f;
+        }
+
+        public static Color from_hsv(float hue, float saturation, float value, float alpha = 1.0f)
+        {
+            if (saturation == 0)
+            {
+                // acp_hromatic (grey)
+                return new Color(value, value, value, alpha);
+            }
+
+            int i;
+            float f, p, q, t;
+
+            hue *= 6.0f;
+            hue %= 6f;
+            i = (int)hue;
+
+            f = hue - i;
+            p = value * (1 - saturation);
+            q = value * (1 - saturation * f);
+            t = value * (1 - saturation * (1 - f));
+
+            switch (i)
+            {
+                case 0: // Red is the dominant color
+                    return new Color(value, t, p, alpha);
+                case 1: // Green is the dominant color
+                    return new Color(q, value, p, alpha);
+                case 2:
+                    return new Color(p, value, t, alpha);
+                case 3: // Blue is the dominant color
+                    return new Color(p, q, value, alpha);
+                case 4:
+                    return new Color(t, p, value, alpha);
+                default: // (5) Red is the dominant color
+                    return new Color(value, p, q, alpha);
+            }
+        }
+
+        public Color blend(Color over)
+        {
+            Color res;
+
+            float sa = 1.0f - over.a;
+            res.a = a * sa + over.a;
+
+            if (res.a == 0)
+            {
+                return new Color(0, 0, 0, 0);
+            }
+            else
+            {
+                res.r = (r * a * sa + over.r * over.a) / res.a;
+                res.g = (g * a * sa + over.g * over.a) / res.a;
+                res.b = (b * a * sa + over.b * over.a) / res.a;
+            }
+
+            return res;
+        }
+
+        public Color contrasted()
+        {
+            return new Color(
+                (r + 0.5f) % 1.0f,
+                (g + 0.5f) % 1.0f,
+                (b + 0.5f) % 1.0f
+            );
+        }
+
+        public float gray()
+        {
+            return (r + g + b) / 3.0f;
+        }
+
+        public Color inverted()
+        {
+            return new Color(
+                1.0f - r,
+                1.0f - g,
+                1.0f - b
+            );
+        }
+
+        public Color linear_interpolate(Color b, float t)
+        {
+            Color res = this;
+
+            res.r += (t * (b.r - this.r));
+            res.g += (t * (b.g - this.g));
+            res.b += (t * (b.b - this.b));
+            res.a += (t * (b.a - this.a));
+
+            return res;
+        }
+
+        public int to_32()
+        {
+            int c = (byte)(a * 255);
+            c <<= 8;
+            c |= (byte)(r * 255);
+            c <<= 8;
+            c |= (byte)(g * 255);
+            c <<= 8;
+            c |= (byte)(b * 255);
+
+            return c;
+        }
+
+        public int to_ARGB32()
+        {
+            int c = (byte)(a * 255);
+            c <<= 8;
+            c |= (byte)(r * 255);
+            c <<= 8;
+            c |= (byte)(g * 255);
+            c <<= 8;
+            c |= (byte)(b * 255);
+
+            return c;
+        }
+
+        public string to_html(bool include_alpha = true)
+        {
+            String txt = string.Empty;
+
+            txt += _to_hex(r);
+            txt += _to_hex(g);
+            txt += _to_hex(b);
+
+            if (include_alpha)
+                txt = _to_hex(a) + txt;
+
+            return txt;
+        }
+
+        public Color(float r, float g, float b, float a = 1.0f)
+        {
+            this.r = r;
+            this.g = g;
+            this.b = b;
+            this.a = a;
+        }
+
+        public Color(int rgba)
+        {
+            this.a = (rgba & 0xFF) / 255.0f;
+            rgba >>= 8;
+            this.b = (rgba & 0xFF) / 255.0f;
+            rgba >>= 8;
+            this.g = (rgba & 0xFF) / 255.0f;
+            rgba >>= 8;
+            this.r = (rgba & 0xFF) / 255.0f;
+        }
+
+        private static float _parse_col(string str, int ofs)
+        {
+            int ig = 0;
+
+            for (int i = 0; i < 2; i++)
+            {
+                int c = str[i + ofs];
+                int v = 0;
+
+                if (c >= '0' && c <= '9')
+                {
+                    v = c - '0';
+                }
+                else if (c >= 'a' && c <= 'f')
+                {
+                    v = c - 'a';
+                    v += 10;
+                }
+                else if (c >= 'A' && c <= 'F')
+                {
+                    v = c - 'A';
+                    v += 10;
+                }
+                else
+                {
+                    return -1;
+                }
+
+                if (i == 0)
+                    ig += v * 16;
+                else
+                    ig += v;
+            }
+
+            return ig;
+        }
+
+        private String _to_hex(float val)
+        {
+            int v = (int)Mathf.clamp(val * 255.0f, 0, 255);
+
+            string ret = string.Empty;
+
+            for (int i = 0; i < 2; i++)
+            {
+                char[] c = { (char)0, (char)0 };
+                int lv = v & 0xF;
+
+                if (lv < 10)
+                    c[0] = (char)('0' + lv);
+                else
+                    c[0] = (char)('a' + lv - 10);
+
+                v >>= 4;
+                ret = c + ret;
+            }
+
+            return ret;
+        }
+
+        internal static bool html_is_valid(string color)
+        {
+            if (color.Length == 0)
+                return false;
+
+            if (color[0] == '#')
+                color = color.Substring(1, color.Length - 1);
+
+            bool alpha = false;
+
+            if (color.Length == 8)
+                alpha = true;
+            else if (color.Length == 6)
+                alpha = false;
+            else
+                return false;
+
+            if (alpha)
+            {
+                if ((int)_parse_col(color, 0) < 0)
+                    return false;
+            }
+
+            int from = alpha ? 2 : 0;
+
+            if ((int)_parse_col(color, from + 0) < 0)
+                return false;
+            if ((int)_parse_col(color, from + 2) < 0)
+                return false;
+            if ((int)_parse_col(color, from + 4) < 0)
+                return false;
+
+            return true;
+        }
+
+        public static Color Color8(byte r8, byte g8, byte b8, byte a8)
+        {
+            return new Color((float)r8 / 255f, (float)g8 / 255f, (float)b8 / 255f, (float)a8 / 255f);
+        }
+
+        public Color(string rgba)
+        {
+            if (rgba.Length == 0)
+            {
+                r = 0f;
+                g = 0f;
+                b = 0f;
+                a = 1.0f;
+                return;
+            }
+
+            if (rgba[0] == '#')
+                rgba = rgba.Substring(1);
+
+            bool alpha = false;
+
+            if (rgba.Length == 8)
+            {
+                alpha = true;
+            }
+            else if (rgba.Length == 6)
+            {
+                alpha = false;
+            }
+            else
+            {
+                throw new ArgumentOutOfRangeException("Invalid color code. Length is " + rgba.Length + " but a length of 6 or 8 is expected: " + rgba);
+            }
+
+            if (alpha)
+            {
+                a = _parse_col(rgba, 0);
+
+                if (a < 0)
+                    throw new ArgumentOutOfRangeException("Invalid color code. Alpha is " + a + " but zero or greater is expected: " + rgba);
+            }
+            else
+            {
+                a = 1.0f;
+            }
+
+            int from = alpha ? 2 : 0;
+
+            r = _parse_col(rgba, from + 0);
+
+            if (r < 0)
+                throw new ArgumentOutOfRangeException("Invalid color code. Red is " + r + " but zero or greater is expected: " + rgba);
+
+            g = _parse_col(rgba, from + 2);
+
+            if (g < 0)
+                throw new ArgumentOutOfRangeException("Invalid color code. Green is " + g + " but zero or greater is expected: " + rgba);
+
+            b = _parse_col(rgba, from + 4);
+
+            if (b < 0)
+                throw new ArgumentOutOfRangeException("Invalid color code. Blue is " + b + " but zero or greater is expected: " + rgba);
+        }
+
+        public static bool operator ==(Color left, Color right)
+        {
+            return left.Equals(right);
+        }
+
+        public static bool operator !=(Color left, Color right)
+        {
+            return !left.Equals(right);
+        }
+
+        public static bool operator <(Color left, Color right)
+        {
+            if (left.r == right.r)
+            {
+                if (left.g == right.g)
+                {
+                    if (left.b == right.b)
+                        return (left.a < right.a);
+                    else
+                        return (left.b < right.b);
+                }
+                else
+                {
+                    return left.g < right.g;
+                }
+            }
+
+            return left.r < right.r;
+        }
+
+        public static bool operator >(Color left, Color right)
+        {
+            if (left.r == right.r)
+            {
+                if (left.g == right.g)
+                {
+                    if (left.b == right.b)
+                        return (left.a > right.a);
+                    else
+                        return (left.b > right.b);
+                }
+                else
+                {
+                    return left.g > right.g;
+                }
+            }
+
+            return left.r > right.r;
+        }
+
+        public override bool Equals(object obj)
+        {
+            if (obj is Color)
+            {
+                return Equals((Color)obj);
+            }
+
+            return false;
+        }
+
+        public bool Equals(Color other)
+        {
+            return r == other.r && g == other.g && b == other.b && a == other.a;
+        }
+
+        public override int GetHashCode()
+        {
+            return r.GetHashCode() ^ g.GetHashCode() ^ b.GetHashCode() ^ a.GetHashCode();
+        }
+
+        public override string ToString()
+        {
+            return String.Format("{0},{1},{2},{3}", new object[]
+                {
+                    this.r.ToString(),
+                    this.g.ToString(),
+                    this.b.ToString(),
+                    this.a.ToString()
+                });
+        }
+
+        public string ToString(string format)
+        {
+            return String.Format("{0},{1},{2},{3}", new object[]
+                {
+                    this.r.ToString(format),
+                    this.g.ToString(format),
+                    this.b.ToString(format),
+                    this.a.ToString(format)
+                });
+        }
+    }
+}
diff --git a/modules/mono/glue/cs_files/Error.cs b/modules/mono/glue/cs_files/Error.cs
new file mode 100644
index 00000000000..3f4a92603de
--- /dev/null
+++ b/modules/mono/glue/cs_files/Error.cs
@@ -0,0 +1,48 @@
+namespace Godot
+{
+    public enum Error : int
+    {
+        OK = 0,
+        FAILED = 1,
+        ERR_UNAVAILABLE = 2,
+        ERR_UNCONFIGURED = 3,
+        ERR_UNAUTHORIZED = 4,
+        ERR_PARAMETER_RANGE_ERROR = 5,
+        ERR_OUT_OF_MEMORY = 6,
+        ERR_FILE_NOT_FOUND = 7,
+        ERR_FILE_BAD_DRIVE = 8,
+        ERR_FILE_BAD_PATH = 9,
+        ERR_FILE_NO_PERMISSION = 10,
+        ERR_FILE_ALREADY_IN_USE = 11,
+        ERR_FILE_CANT_OPEN = 12,
+        ERR_FILE_CANT_WRITE = 13,
+        ERR_FILE_CANT_READ = 14,
+        ERR_FILE_UNRECOGNIZED = 15,
+        ERR_FILE_CORRUPT = 16,
+        ERR_FILE_MISSING_DEPENDENCIES = 17,
+        ERR_FILE_EOF = 18,
+        ERR_CANT_OPEN = 19,
+        ERR_CANT_CREATE = 20,
+        ERR_PARSE_ERROR = 43,
+        ERROR_QUERY_FAILED = 21,
+        ERR_ALREADY_IN_USE = 22,
+        ERR_LOCKED = 23,
+        ERR_TIMEOUT = 24,
+        ERR_CANT_AQUIRE_RESOURCE = 28,
+        ERR_INVALID_DATA = 30,
+        ERR_INVALID_PARAMETER = 31,
+        ERR_ALREADY_EXISTS = 32,
+        ERR_DOES_NOT_EXIST = 33,
+        ERR_DATABASE_CANT_READ = 34,
+        ERR_DATABASE_CANT_WRITE = 35,
+        ERR_COMPILATION_FAILED = 36,
+        ERR_METHOD_NOT_FOUND = 37,
+        ERR_LINK_FAILED = 38,
+        ERR_SCRIPT_FAILED = 39,
+        ERR_CYCLIC_LINK = 40,
+        ERR_BUSY = 44,
+        ERR_HELP = 46,
+        ERR_BUG = 47,
+        ERR_WTF = 49
+    }
+}
diff --git a/modules/mono/glue/cs_files/ExportAttribute.cs b/modules/mono/glue/cs_files/ExportAttribute.cs
new file mode 100644
index 00000000000..af3f603d6d7
--- /dev/null
+++ b/modules/mono/glue/cs_files/ExportAttribute.cs
@@ -0,0 +1,19 @@
+using System;
+
+namespace Godot
+{
+	[AttributeUsage(AttributeTargets.Field | AttributeTargets.Property)]
+	public class ExportAttribute : Attribute
+	{
+		private int hint;
+		private string hint_string;
+		private int usage;
+
+		public ExportAttribute(int hint = GD.PROPERTY_HINT_NONE, string hint_string = "", int usage = GD.PROPERTY_USAGE_DEFAULT)
+		{
+			this.hint = hint;
+			this.hint_string = hint_string;
+			this.usage = usage;
+		}
+	}
+}
diff --git a/modules/mono/glue/cs_files/GD.cs b/modules/mono/glue/cs_files/GD.cs
new file mode 100644
index 00000000000..40a42d23b4f
--- /dev/null
+++ b/modules/mono/glue/cs_files/GD.cs
@@ -0,0 +1,191 @@
+using System;
+
+namespace Godot
+{
+    public static class GD
+    {
+        /*{GodotGlobalConstants}*/
+
+        public static object bytes2var(byte[] bytes)
+        {
+            return NativeCalls.godot_icall_Godot_bytes2var(bytes);
+        }
+
+        public static object convert(object what, int type)
+        {
+            return NativeCalls.godot_icall_Godot_convert(what, type);
+        }
+
+        public static float db2linear(float db)
+        {
+            return (float)Math.Exp(db * 0.11512925464970228420089957273422);
+        }
+
+        public static float dectime(float value, float amount, float step)
+        {
+            float sgn = value < 0 ? -1.0f : 1.0f;
+            float val = Mathf.abs(value);
+            val -= amount * step;
+            if (val < 0.0f)
+                val = 0.0f;
+            return val * sgn;
+        }
+
+        public static FuncRef funcref(Object instance, string funcname)
+        {
+            var ret = new FuncRef();
+            ret.SetInstance(instance);
+            ret.SetFunction(funcname);
+            return ret;
+        }
+
+        public static int hash(object var)
+        {
+            return NativeCalls.godot_icall_Godot_hash(var);
+        }
+
+        public static Object instance_from_id(int instance_id)
+        {
+            return NativeCalls.godot_icall_Godot_instance_from_id(instance_id);
+        }
+
+        public static double linear2db(double linear)
+        {
+            return Math.Log(linear) * 8.6858896380650365530225783783321;
+        }
+
+        public static Resource load(string path)
+        {
+            return ResourceLoader.Load(path);
+        }
+
+        public static void print(params object[] what)
+        {
+            NativeCalls.godot_icall_Godot_print(what);
+        }
+
+        public static void print_stack()
+        {
+            print(System.Environment.StackTrace);
+        }
+
+        public static void printerr(params object[] what)
+        {
+            NativeCalls.godot_icall_Godot_printerr(what);
+        }
+
+        public static void printraw(params object[] what)
+        {
+            NativeCalls.godot_icall_Godot_printraw(what);
+        }
+
+        public static void prints(params object[] what)
+        {
+            NativeCalls.godot_icall_Godot_prints(what);
+        }
+
+        public static void printt(params object[] what)
+        {
+            NativeCalls.godot_icall_Godot_printt(what);
+        }
+
+        public static int[] range(int length)
+        {
+            int[] ret = new int[length];
+
+            for (int i = 0; i < length; i++)
+            {
+                ret[i] = i;
+            }
+
+            return ret;
+        }
+
+        public static int[] range(int from, int to)
+        {
+            if (to < from)
+                return new int[0];
+
+            int[] ret = new int[to - from];
+
+            for (int i = from; i < to; i++)
+            {
+                ret[i - from] = i;
+            }
+
+            return ret;
+        }
+
+        public static int[] range(int from, int to, int increment)
+        {
+            if (to < from && increment > 0)
+                return new int[0];
+            if (to > from && increment < 0)
+                return new int[0];
+
+            // Calculate count
+            int count = 0;
+
+            if (increment > 0)
+                count = ((to - from - 1) / increment) + 1;
+            else
+                count = ((from - to - 1) / -increment) + 1;
+
+            int[] ret = new int[count];
+
+            if (increment > 0)
+            {
+                int idx = 0;
+                for (int i = from; i < to; i += increment)
+                {
+                    ret[idx++] = i;
+                }
+            }
+            else
+            {
+                int idx = 0;
+                for (int i = from; i > to; i += increment)
+                {
+                    ret[idx++] = i;
+                }
+            }
+
+            return ret;
+        }
+
+        public static void seed(int seed)
+        {
+            NativeCalls.godot_icall_Godot_seed(seed);
+        }
+
+        public static string str(params object[] what)
+        {
+            return NativeCalls.godot_icall_Godot_str(what);
+        }
+
+        public static object str2var(string str)
+        {
+            return NativeCalls.godot_icall_Godot_str2var(str);
+        }
+
+        public static bool type_exists(string type)
+        {
+            return NativeCalls.godot_icall_Godot_type_exists(type);
+        }
+
+        public static byte[] var2bytes(object var)
+        {
+            return NativeCalls.godot_icall_Godot_var2bytes(var);
+        }
+
+        public static string var2str(object var)
+        {
+            return NativeCalls.godot_icall_Godot_var2str(var);
+        }
+
+        public static WeakRef weakref(Object obj)
+        {
+            return NativeCalls.godot_icall_Godot_weakref(Object.GetPtr(obj));
+        }
+    }
+}
diff --git a/modules/mono/glue/cs_files/GodotMethodAttribute.cs b/modules/mono/glue/cs_files/GodotMethodAttribute.cs
new file mode 100644
index 00000000000..21333c8dab0
--- /dev/null
+++ b/modules/mono/glue/cs_files/GodotMethodAttribute.cs
@@ -0,0 +1,17 @@
+using System;
+
+namespace Godot
+{
+    [AttributeUsage(AttributeTargets.Method, Inherited = true)]
+    internal class GodotMethodAttribute : Attribute
+    {
+        private string methodName;
+
+        public string MethodName { get { return methodName; } }
+
+        public GodotMethodAttribute(string methodName)
+        {
+            this.methodName = methodName;
+        }
+    }
+}
diff --git a/modules/mono/glue/cs_files/GodotSynchronizationContext.cs b/modules/mono/glue/cs_files/GodotSynchronizationContext.cs
new file mode 100644
index 00000000000..eb4d0bed1cc
--- /dev/null
+++ b/modules/mono/glue/cs_files/GodotSynchronizationContext.cs
@@ -0,0 +1,26 @@
+using System;
+using System.Collections.Concurrent;
+using System.Collections.Generic;
+using System.Threading;
+
+namespace Godot
+{
+	public class GodotSynchronizationContext : SynchronizationContext
+	{
+		private readonly BlockingCollection<KeyValuePair<SendOrPostCallback, object>> queue = new BlockingCollection<KeyValuePair<SendOrPostCallback, object>>();
+
+		public override void Post(SendOrPostCallback d, object state)
+		{
+			queue.Add(new KeyValuePair<SendOrPostCallback, object>(d, state));
+		}
+
+		public void ExecutePendingContinuations()
+		{
+			KeyValuePair<SendOrPostCallback, object> workItem;
+			while (queue.TryTake(out workItem))
+			{
+				workItem.Key(workItem.Value);
+			}
+		}
+	}
+}
diff --git a/modules/mono/glue/cs_files/GodotTaskScheduler.cs b/modules/mono/glue/cs_files/GodotTaskScheduler.cs
new file mode 100644
index 00000000000..f587645a499
--- /dev/null
+++ b/modules/mono/glue/cs_files/GodotTaskScheduler.cs
@@ -0,0 +1,94 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace Godot
+{
+	public class GodotTaskScheduler : TaskScheduler
+	{
+		private GodotSynchronizationContext Context { get; set; }
+		private readonly LinkedList<Task> _tasks = new LinkedList<Task>();
+
+		public GodotTaskScheduler()
+		{
+			Context = new GodotSynchronizationContext();
+		}
+
+		protected sealed override void QueueTask(Task task)
+		{
+			lock (_tasks)
+			{
+				_tasks.AddLast(task);
+			}
+		}
+
+		protected sealed override bool TryExecuteTaskInline(Task task, bool taskWasPreviouslyQueued)
+		{
+			if (SynchronizationContext.Current != Context)
+			{
+				return false;
+			}
+
+			if (taskWasPreviouslyQueued)
+			{
+				TryDequeue(task);
+			}
+
+			return base.TryExecuteTask(task);
+		}
+
+		protected sealed override bool TryDequeue(Task task)
+		{
+			lock (_tasks)
+			{
+				return _tasks.Remove(task);
+			}
+		}
+
+		protected sealed override IEnumerable<Task> GetScheduledTasks()
+		{
+			lock (_tasks)
+			{
+				return _tasks.ToArray();
+			}
+		}
+
+		public void Activate()
+		{
+			SynchronizationContext.SetSynchronizationContext(Context);
+			ExecuteQueuedTasks();
+			Context.ExecutePendingContinuations();
+		}
+
+		private void ExecuteQueuedTasks()
+		{
+			while (true)
+			{
+				Task task;
+
+				lock (_tasks)
+				{
+					if (_tasks.Any())
+					{
+						task = _tasks.First.Value;
+						_tasks.RemoveFirst();
+					}
+					else
+					{
+						break;
+					}
+				}
+
+				if (task != null)
+				{
+					if (!TryExecuteTask(task))
+					{
+						throw new InvalidOperationException();
+					}
+				}
+			}
+		}
+	}
+}
diff --git a/modules/mono/glue/cs_files/IAwaitable.cs b/modules/mono/glue/cs_files/IAwaitable.cs
new file mode 100644
index 00000000000..0397957d00a
--- /dev/null
+++ b/modules/mono/glue/cs_files/IAwaitable.cs
@@ -0,0 +1,12 @@
+namespace Godot
+{
+    public interface IAwaitable
+    {
+        IAwaiter GetAwaiter();
+    }
+
+    public interface IAwaitable<out TResult>
+    {
+        IAwaiter<TResult> GetAwaiter();
+    }
+}
diff --git a/modules/mono/glue/cs_files/IAwaiter.cs b/modules/mono/glue/cs_files/IAwaiter.cs
new file mode 100644
index 00000000000..73c71b5634b
--- /dev/null
+++ b/modules/mono/glue/cs_files/IAwaiter.cs
@@ -0,0 +1,19 @@
+using System;
+using System.Runtime.CompilerServices;
+
+namespace Godot
+{
+	public interface IAwaiter : INotifyCompletion
+	{
+		bool IsCompleted { get; }
+
+		void GetResult();
+	}
+
+	public interface IAwaiter<out TResult> : INotifyCompletion
+	{
+		bool IsCompleted { get; }
+
+		TResult GetResult();
+	}
+}
diff --git a/modules/mono/glue/cs_files/MarshalUtils.cs b/modules/mono/glue/cs_files/MarshalUtils.cs
new file mode 100644
index 00000000000..5d401113392
--- /dev/null
+++ b/modules/mono/glue/cs_files/MarshalUtils.cs
@@ -0,0 +1,36 @@
+using System;
+using System.Collections.Generic;
+
+namespace Godot
+{
+    internal static class MarshalUtils
+    {
+        private static Dictionary<object, object> ArraysToDictionary(object[] keys, object[] values)
+        {
+            Dictionary<object, object> ret = new Dictionary<object, object>();
+
+            for (int i = 0; i < keys.Length; i++)
+            {
+                ret.Add(keys[i], values[i]);
+            }
+
+            return ret;
+        }
+
+        private static void DictionaryToArrays(Dictionary<object, object> from, out object[] keysTo, out object[] valuesTo)
+        {
+            Dictionary<object, object>.KeyCollection keys = from.Keys;
+            keysTo = new object[keys.Count];
+            keys.CopyTo(keysTo, 0);
+
+            Dictionary<object, object>.ValueCollection values = from.Values;
+            valuesTo = new object[values.Count];
+            values.CopyTo(valuesTo, 0);
+        }
+
+        private static Type GetDictionaryType()
+        {
+            return typeof(Dictionary<object, object>);
+        }
+    }
+}
diff --git a/modules/mono/glue/cs_files/Mathf.cs b/modules/mono/glue/cs_files/Mathf.cs
new file mode 100644
index 00000000000..cb0eb1acdd6
--- /dev/null
+++ b/modules/mono/glue/cs_files/Mathf.cs
@@ -0,0 +1,234 @@
+using System;
+
+namespace Godot
+{
+    public static class Mathf
+    {
+        public const float PI = 3.14159274f;
+        public const float Epsilon = 1e-06f;
+
+        private const float Deg2RadConst = 0.0174532924f;
+        private const float Rad2DegConst = 57.29578f;
+
+        public static float abs(float s)
+        {
+            return Math.Abs(s);
+        }
+
+        public static float acos(float s)
+        {
+            return (float)Math.Acos(s);
+        }
+
+        public static float asin(float s)
+        {
+            return (float)Math.Asin(s);
+        }
+
+        public static float atan(float s)
+        {
+            return (float)Math.Atan(s);
+        }
+
+        public static float atan2(float x, float y)
+        {
+            return (float)Math.Atan2(x, y);
+        }
+
+        public static float ceil(float s)
+        {
+            return (float)Math.Ceiling(s);
+        }
+
+        public static float clamp(float val, float min, float max)
+        {
+            if (val < min)
+            {
+                return min;
+            }
+            else if (val > max)
+            {
+                return max;
+            }
+
+            return val;
+        }
+
+        public static float cos(float s)
+        {
+            return (float)Math.Cos(s);
+        }
+
+        public static float cosh(float s)
+        {
+            return (float)Math.Cosh(s);
+        }
+
+        public static int decimals(float step)
+        {
+            return decimals(step);
+        }
+
+        public static int decimals(decimal step)
+        {
+            return BitConverter.GetBytes(decimal.GetBits(step)[3])[2];
+        }
+
+        public static float deg2rad(float deg)
+        {
+            return deg * Deg2RadConst;
+        }
+
+        public static float ease(float s, float curve)
+        {
+            if (s < 0f)
+            {
+                s = 0f;
+            }
+            else if (s > 1.0f)
+            {
+                s = 1.0f;
+            }
+
+            if (curve > 0f)
+            {
+                if (curve < 1.0f)
+                {
+                    return 1.0f - pow(1.0f - s, 1.0f / curve);
+                }
+
+                return pow(s, curve);
+            }
+            else if (curve < 0f)
+            {
+                if (s < 0.5f)
+                {
+                    return pow(s * 2.0f, -curve) * 0.5f;
+                }
+
+                return (1.0f - pow(1.0f - (s - 0.5f) * 2.0f, -curve)) * 0.5f + 0.5f;
+            }
+
+            return 0f;
+        }
+
+        public static float exp(float s)
+        {
+            return (float)Math.Exp(s);
+        }
+
+        public static float floor(float s)
+        {
+            return (float)Math.Floor(s);
+        }
+
+        public static float fposmod(float x, float y)
+        {
+            if (x >= 0f)
+            {
+                return x % y;
+            }
+            else
+            {
+                return y - (-x % y);
+            }
+        }
+
+        public static float lerp(float from, float to, float weight)
+        {
+            return from + (to - from) * clamp(weight, 0f, 1f);
+        }
+
+        public static float log(float s)
+        {
+            return (float)Math.Log(s);
+        }
+
+        public static int max(int a, int b)
+        {
+            return (a > b) ? a : b;
+        }
+
+        public static float max(float a, float b)
+        {
+            return (a > b) ? a : b;
+        }
+
+        public static int min(int a, int b)
+        {
+            return (a < b) ? a : b;
+        }
+
+        public static float min(float a, float b)
+        {
+            return (a < b) ? a : b;
+        }
+
+        public static int nearest_po2(int val)
+        {
+            val--;
+            val |= val >> 1;
+            val |= val >> 2;
+            val |= val >> 4;
+            val |= val >> 8;
+            val |= val >> 16;
+            val++;
+            return val;
+        }
+
+        public static float pow(float x, float y)
+        {
+            return (float)Math.Pow(x, y);
+        }
+
+        public static float rad2deg(float rad)
+        {
+            return rad * Rad2DegConst;
+        }
+
+        public static float round(float s)
+        {
+            return (float)Math.Round(s);
+        }
+
+        public static float sign(float s)
+        {
+            return (s < 0f) ? -1f : 1f;
+        }
+
+        public static float sin(float s)
+        {
+            return (float)Math.Sin(s);
+        }
+
+        public static float sinh(float s)
+        {
+            return (float)Math.Sinh(s);
+        }
+
+        public static float sqrt(float s)
+        {
+            return (float)Math.Sqrt(s);
+        }
+
+        public static float stepify(float s, float step)
+        {
+            if (step != 0f)
+            {
+                s = floor(s / step + 0.5f) * step;
+            }
+
+            return s;
+        }
+
+        public static float tan(float s)
+        {
+            return (float)Math.Tan(s);
+        }
+
+        public static float tanh(float s)
+        {
+            return (float)Math.Tanh(s);
+        }
+    }
+}
diff --git a/modules/mono/glue/cs_files/Plane.cs b/modules/mono/glue/cs_files/Plane.cs
new file mode 100644
index 00000000000..ada6e465ac1
--- /dev/null
+++ b/modules/mono/glue/cs_files/Plane.cs
@@ -0,0 +1,209 @@
+using System;
+
+namespace Godot
+{
+    public struct Plane : IEquatable<Plane>
+    {
+        Vector3 normal;
+
+        public float x
+        {
+            get
+            {
+                return normal.x;
+            }
+            set
+            {
+                normal.x = value;
+            }
+        }
+
+        public float y
+        {
+            get
+            {
+                return normal.y;
+            }
+            set
+            {
+                normal.y = value;
+            }
+        }
+
+        public float z
+        {
+            get
+            {
+                return normal.z;
+            }
+            set
+            {
+                normal.z = value;
+            }
+        }
+
+        float d;
+
+        public Vector3 Center
+        {
+            get
+            {
+                return normal * d;
+            }
+        }
+
+        public float distance_to(Vector3 point)
+        {
+            return normal.dot(point) - d;
+        }
+
+        public Vector3 get_any_point()
+        {
+            return normal * d;
+        }
+
+        public bool has_point(Vector3 point, float epsilon = Mathf.Epsilon)
+        {
+            float dist = normal.dot(point) - d;
+            return Mathf.abs(dist) <= epsilon;
+        }
+
+        public Vector3 intersect_3(Plane b, Plane c)
+        {
+            float denom = normal.cross(b.normal).dot(c.normal);
+
+            if (Mathf.abs(denom) <= Mathf.Epsilon)
+                return new Vector3();
+
+            Vector3 result = (b.normal.cross(c.normal) * this.d) +
+                                (c.normal.cross(normal) * b.d) +
+                                (normal.cross(b.normal) * c.d);
+
+            return result / denom;
+        }
+
+        public Vector3 intersect_ray(Vector3 from, Vector3 dir)
+        {
+            float den = normal.dot(dir);
+
+            if (Mathf.abs(den) <= Mathf.Epsilon)
+                return new Vector3();
+
+            float dist = (normal.dot(from) - d) / den;
+
+            // This is a ray, before the emiting pos (from) does not exist
+            if (dist > Mathf.Epsilon)
+                return new Vector3();
+
+            return from + dir * -dist;
+        }
+
+        public Vector3 intersect_segment(Vector3 begin, Vector3 end)
+        {
+            Vector3 segment = begin - end;
+            float den = normal.dot(segment);
+
+            if (Mathf.abs(den) <= Mathf.Epsilon)
+                return new Vector3();
+
+            float dist = (normal.dot(begin) - d) / den;
+
+            if (dist < -Mathf.Epsilon || dist > (1.0f + Mathf.Epsilon))
+                return new Vector3();
+
+            return begin + segment * -dist;
+        }
+
+        public bool is_point_over(Vector3 point)
+        {
+            return normal.dot(point) > d;
+        }
+
+        public Plane normalized()
+        {
+            float len = normal.length();
+
+            if (len == 0)
+                return new Plane(0, 0, 0, 0);
+
+            return new Plane(normal / len, d / len);
+        }
+
+        public Vector3 project(Vector3 point)
+        {
+            return point - normal * distance_to(point);
+        }
+
+        public Plane(float a, float b, float c, float d)
+        {
+            normal = new Vector3(a, b, c);
+            this.d = d;
+        }
+
+        public Plane(Vector3 normal, float d)
+        {
+            this.normal = normal;
+            this.d = d;
+        }
+
+        public Plane(Vector3 v1, Vector3 v2, Vector3 v3)
+        {
+            normal = (v1 - v3).cross(v1 - v2);
+            normal.normalize();
+            d = normal.dot(v1);
+        }
+
+        public static Plane operator -(Plane plane)
+        {
+            return new Plane(-plane.normal, -plane.d);
+        }
+
+        public static bool operator ==(Plane left, Plane right)
+        {
+            return left.Equals(right);
+        }
+
+        public static bool operator !=(Plane left, Plane right)
+        {
+            return !left.Equals(right);
+        }
+
+        public override bool Equals(object obj)
+        {
+            if (obj is Plane)
+            {
+                return Equals((Plane)obj);
+            }
+
+            return false;
+        }
+
+        public bool Equals(Plane other)
+        {
+            return normal == other.normal && d == other.d;
+        }
+
+        public override int GetHashCode()
+        {
+            return normal.GetHashCode() ^ d.GetHashCode();
+        }
+
+        public override string ToString()
+        {
+            return String.Format("({0}, {1})", new object[]
+            {
+                this.normal.ToString(),
+                this.d.ToString()
+            });
+        }
+
+        public string ToString(string format)
+        {
+            return String.Format("({0}, {1})", new object[]
+            {
+                this.normal.ToString(format),
+                this.d.ToString(format)
+            });
+        }
+    }
+}
diff --git a/modules/mono/glue/cs_files/Quat.cs b/modules/mono/glue/cs_files/Quat.cs
new file mode 100644
index 00000000000..6345239f47a
--- /dev/null
+++ b/modules/mono/glue/cs_files/Quat.cs
@@ -0,0 +1,328 @@
+using System;
+using System.Runtime.InteropServices;
+
+namespace Godot
+{
+    [StructLayout(LayoutKind.Sequential)]
+    public struct Quat : IEquatable<Quat>
+    {
+        private static readonly Quat identity = new Quat(0f, 0f, 0f, 1f);
+
+        public float x;
+        public float y;
+        public float z;
+        public float w;
+
+        public static Quat Identity
+        {
+            get { return identity; }
+        }
+
+        public float this[int index]
+        {
+            get
+            {
+                switch (index)
+                {
+                    case 0:
+                        return x;
+                    case 1:
+                        return y;
+                    case 2:
+                        return z;
+                    case 3:
+                        return w;
+                    default:
+                        throw new IndexOutOfRangeException();
+                }
+            }
+            set
+            {
+                switch (index)
+                {
+                    case 0:
+                        x = value;
+                        break;
+                    case 1:
+                        y = value;
+                        break;
+                    case 2:
+                        z = value;
+                        break;
+                    case 3:
+                        w = value;
+                        break;
+                    default:
+                        throw new IndexOutOfRangeException();
+                }
+            }
+        }
+
+        public Quat cubic_slerp(Quat b, Quat preA, Quat postB, float t)
+        {
+            float t2 = (1.0f - t) * t * 2f;
+            Quat sp = slerp(b, t);
+            Quat sq = preA.slerpni(postB, t);
+            return sp.slerpni(sq, t2);
+        }
+
+        public float dot(Quat b)
+        {
+            return x * b.x + y * b.y + z * b.z + w * b.w;
+        }
+
+        public Quat inverse()
+        {
+            return new Quat(-x, -y, -z, w);
+        }
+
+        public float length()
+        {
+            return Mathf.sqrt(length_squared());
+        }
+
+        public float length_squared()
+        {
+            return dot(this);
+        }
+
+        public Quat normalized()
+        {
+            return this / length();
+        }
+
+        public void set(float x, float y, float z, float w)
+        {
+            this.x = x;
+            this.y = y;
+            this.z = z;
+            this.w = w;
+        }
+
+        public Quat slerp(Quat b, float t)
+        {
+            // Calculate cosine
+            float cosom = x * b.x + y * b.y + z * b.z + w * b.w;
+
+            float[] to1 = new float[4];
+
+            // Adjust signs if necessary
+            if (cosom < 0.0)
+            {
+                cosom = -cosom; to1[0] = -b.x;
+                to1[1] = -b.y;
+                to1[2] = -b.z;
+                to1[3] = -b.w;
+            }
+            else
+            {
+                to1[0] = b.x;
+                to1[1] = b.y;
+                to1[2] = b.z;
+                to1[3] = b.w;
+            }
+
+            float sinom, scale0, scale1;
+
+            // Calculate coefficients
+            if ((1.0 - cosom) > Mathf.Epsilon)
+            {
+                // Standard case (Slerp)
+                float omega = Mathf.acos(cosom);
+                sinom = Mathf.sin(omega);
+                scale0 = Mathf.sin((1.0f - t) * omega) / sinom;
+                scale1 = Mathf.sin(t * omega) / sinom;
+            }
+            else
+            {
+                // Quaternions are very close so we can do a linear interpolation
+                scale0 = 1.0f - t;
+                scale1 = t;
+            }
+
+            // Calculate final values
+            return new Quat
+            (
+                scale0 * x + scale1 * to1[0],
+                scale0 * y + scale1 * to1[1],
+                scale0 * z + scale1 * to1[2],
+                scale0 * w + scale1 * to1[3]
+            );
+        }
+
+        public Quat slerpni(Quat b, float t)
+        {
+            float dot = this.dot(b);
+
+            if (Mathf.abs(dot) > 0.9999f)
+            {
+                return this;
+            }
+
+            float theta = Mathf.acos(dot);
+            float sinT = 1.0f / Mathf.sin(theta);
+            float newFactor = Mathf.sin(t * theta) * sinT;
+            float invFactor = Mathf.sin((1.0f - t) * theta) * sinT;
+
+            return new Quat
+            (
+                invFactor * this.x + newFactor * b.x,
+                invFactor * this.y + newFactor * b.y,
+                invFactor * this.z + newFactor * b.z,
+                invFactor * this.w + newFactor * b.w
+            );
+        }
+
+        public Vector3 xform(Vector3 v)
+        {
+            Quat q = this * v;
+            q *= this.inverse();
+            return new Vector3(q.x, q.y, q.z);
+        }
+
+        public Quat(float x, float y, float z, float w)
+        {
+            this.x = x;
+            this.y = y;
+            this.z = z;
+            this.w = w;
+        }
+
+        public Quat(Vector3 axis, float angle)
+        {
+            float d = axis.length();
+
+            if (d == 0f)
+            {
+                x = 0f;
+                y = 0f;
+                z = 0f;
+                w = 0f;
+            }
+            else
+            {
+                float s = Mathf.sin(-angle * 0.5f) / d;
+
+                x = axis.x * s;
+                y = axis.y * s;
+                z = axis.z * s;
+                w = Mathf.cos(-angle * 0.5f);
+            }
+        }
+
+        public static Quat operator *(Quat left, Quat right)
+        {
+            return new Quat
+            (
+                left.w * right.x + left.x * right.w + left.y * right.z - left.z * right.y,
+                left.w * right.y + left.y * right.w + left.z * right.x - left.x * right.z,
+                left.w * right.z + left.z * right.w + left.x * right.y - left.y * right.x,
+                left.w * right.w - left.x * right.x - left.y * right.y - left.z * right.z
+            );
+        }
+
+        public static Quat operator +(Quat left, Quat right)
+        {
+            return new Quat(left.x + right.x, left.y + right.y, left.z + right.z, left.w + right.w);
+        }
+
+        public static Quat operator -(Quat left, Quat right)
+        {
+            return new Quat(left.x - right.x, left.y - right.y, left.z - right.z, left.w - right.w);
+        }
+
+        public static Quat operator -(Quat left)
+        {
+            return new Quat(-left.x, -left.y, -left.z, -left.w);
+        }
+
+        public static Quat operator *(Quat left, Vector3 right)
+        {
+            return new Quat
+            (
+                left.w * right.x + left.y * right.z - left.z * right.y,
+                left.w * right.y + left.z * right.x - left.x * right.z,
+                left.w * right.z + left.x * right.y - left.y * right.x,
+                -left.x * right.x - left.y * right.y - left.z * right.z
+            );
+        }
+
+        public static Quat operator *(Vector3 left, Quat right)
+        {
+            return new Quat
+            (
+                right.w * left.x + right.y * left.z - right.z * left.y,
+                right.w * left.y + right.z * left.x - right.x * left.z,
+                right.w * left.z + right.x * left.y - right.y * left.x,
+                -right.x * left.x - right.y * left.y - right.z * left.z
+            );
+        }
+
+        public static Quat operator *(Quat left, float right)
+        {
+            return new Quat(left.x * right, left.y * right, left.z * right, left.w * right);
+        }
+
+        public static Quat operator *(float left, Quat right)
+        {
+            return new Quat(right.x * left, right.y * left, right.z * left, right.w * left);
+        }
+
+        public static Quat operator /(Quat left, float right)
+        {
+            return left * (1.0f / right);
+        }
+
+        public static bool operator ==(Quat left, Quat right)
+        {
+            return left.Equals(right);
+        }
+
+        public static bool operator !=(Quat left, Quat right)
+        {
+            return !left.Equals(right);
+        }
+
+        public override bool Equals(object obj)
+        {
+            if (obj is Vector2)
+            {
+                return Equals((Vector2)obj);
+            }
+
+            return false;
+        }
+
+        public bool Equals(Quat other)
+        {
+            return x == other.x && y == other.y && z == other.z && w == other.w;
+        }
+
+        public override int GetHashCode()
+        {
+            return y.GetHashCode() ^ x.GetHashCode() ^ z.GetHashCode() ^ w.GetHashCode();
+        }
+
+        public override string ToString()
+        {
+            return String.Format("({0}, {1}, {2}, {3})", new object[]
+            {
+                this.x.ToString(),
+                this.y.ToString(),
+                this.z.ToString(),
+                this.w.ToString()
+            });
+        }
+
+        public string ToString(string format)
+        {
+            return String.Format("({0}, {1}, {2}, {3})", new object[]
+            {
+                this.x.ToString(format),
+                this.y.ToString(format),
+                this.z.ToString(format),
+                this.w.ToString(format)
+            });
+        }
+    }
+}
diff --git a/modules/mono/glue/cs_files/RPCAttributes.cs b/modules/mono/glue/cs_files/RPCAttributes.cs
new file mode 100644
index 00000000000..08841ffd76a
--- /dev/null
+++ b/modules/mono/glue/cs_files/RPCAttributes.cs
@@ -0,0 +1,16 @@
+using System;
+
+namespace Godot
+{
+    [AttributeUsage(AttributeTargets.Method | AttributeTargets.Field)]
+    public class RemoteAttribute : Attribute {}
+
+    [AttributeUsage(AttributeTargets.Method | AttributeTargets.Field)]
+    public class SyncAttribute : Attribute {}
+
+    [AttributeUsage(AttributeTargets.Method | AttributeTargets.Field)]
+    public class MasterAttribute : Attribute {}
+
+    [AttributeUsage(AttributeTargets.Method | AttributeTargets.Field)]
+    public class SlaveAttribute : Attribute {}
+}
diff --git a/modules/mono/glue/cs_files/Rect2.cs b/modules/mono/glue/cs_files/Rect2.cs
new file mode 100644
index 00000000000..019342134ab
--- /dev/null
+++ b/modules/mono/glue/cs_files/Rect2.cs
@@ -0,0 +1,233 @@
+using System;
+using System.Runtime.InteropServices;
+
+namespace Godot
+{
+    [StructLayout(LayoutKind.Sequential)]
+    public struct Rect2 : IEquatable<Rect2>
+    {
+        private Vector2 position;
+        private Vector2 size;
+
+        public Vector2 Position
+        {
+            get { return position; }
+            set { position = value; }
+        }
+
+        public Vector2 Size
+        {
+            get { return size; }
+            set { size = value; }
+        }
+
+        public Vector2 End
+        {
+            get { return position + size; }
+        }
+
+        public float Area
+        {
+            get { return get_area(); }
+        }
+
+        public Rect2 clip(Rect2 b)
+        {
+            Rect2 newRect = b;
+
+            if (!intersects(newRect))
+                return new Rect2();
+
+            newRect.position.x = Mathf.max(b.position.x, position.x);
+            newRect.position.y = Mathf.max(b.position.y, position.y);
+
+            Vector2 bEnd = b.position + b.size;
+            Vector2 end = position + size;
+
+            newRect.size.x = Mathf.min(bEnd.x, end.x) - newRect.position.x;
+            newRect.size.y = Mathf.min(bEnd.y, end.y) - newRect.position.y;
+
+            return newRect;
+        }
+
+        public bool encloses(Rect2 b)
+        {
+            return (b.position.x >= position.x) && (b.position.y >= position.y) &&
+               ((b.position.x + b.size.x) < (position.x + size.x)) &&
+               ((b.position.y + b.size.y) < (position.y + size.y));
+        }
+
+        public Rect2 expand(Vector2 to)
+        {
+            Rect2 expanded = this;
+
+            Vector2 begin = expanded.position;
+            Vector2 end = expanded.position + expanded.size;
+
+            if (to.x < begin.x)
+                begin.x = to.x;
+            if (to.y < begin.y)
+                begin.y = to.y;
+
+            if (to.x > end.x)
+                end.x = to.x;
+            if (to.y > end.y)
+                end.y = to.y;
+
+            expanded.position = begin;
+            expanded.size = end - begin;
+
+            return expanded;
+        }
+
+        public float get_area()
+        {
+            return size.x * size.y;
+        }
+
+        public Rect2 grow(float by)
+        {
+            Rect2 g = this;
+
+            g.position.x -= by;
+            g.position.y -= by;
+            g.size.x += by * 2;
+            g.size.y += by * 2;
+
+            return g;
+        }
+
+        public Rect2 grow_individual(float left, float top, float right, float bottom)
+        {
+            Rect2 g = this;
+
+            g.position.x -= left;
+            g.position.y -= top;
+            g.size.x += left + right;
+            g.size.y += top + bottom;
+
+            return g;
+        }
+
+        public Rect2 grow_margin(int margin, float by)
+        {
+            Rect2 g = this;
+
+            g.grow_individual((GD.MARGIN_LEFT == margin) ? by : 0,
+                    (GD.MARGIN_TOP == margin) ? by : 0,
+                    (GD.MARGIN_RIGHT == margin) ? by : 0,
+                    (GD.MARGIN_BOTTOM == margin) ? by : 0);
+
+            return g;
+        }
+
+        public bool has_no_area()
+        {
+            return size.x <= 0 || size.y <= 0;
+        }
+
+        public bool has_point(Vector2 point)
+        {
+            if (point.x < position.x)
+                return false;
+            if (point.y < position.y)
+                return false;
+
+            if (point.x >= (position.x + size.x))
+                return false;
+            if (point.y >= (position.y + size.y))
+                return false;
+
+            return true;
+        }
+
+        public bool intersects(Rect2 b)
+        {
+            if (position.x > (b.position.x + b.size.x))
+                return false;
+            if ((position.x + size.x) < b.position.x)
+                return false;
+            if (position.y > (b.position.y + b.size.y))
+                return false;
+            if ((position.y + size.y) < b.position.y)
+                return false;
+
+            return true;
+        }
+
+        public Rect2 merge(Rect2 b)
+        {
+            Rect2 newRect;
+
+            newRect.position.x = Mathf.min(b.position.x, position.x);
+            newRect.position.y = Mathf.min(b.position.y, position.y);
+
+            newRect.size.x = Mathf.max(b.position.x + b.size.x, position.x + size.x);
+            newRect.size.y = Mathf.max(b.position.y + b.size.y, position.y + size.y);
+
+            newRect.size = newRect.size - newRect.position; // Make relative again
+
+            return newRect;
+        }
+
+        public Rect2(Vector2 position, Vector2 size)
+        {
+            this.position = position;
+            this.size = size;
+        }
+
+        public Rect2(float x, float y, float width, float height)
+        {
+            this.position = new Vector2(x, y);
+            this.size = new Vector2(width, height);
+        }
+
+        public static bool operator ==(Rect2 left, Rect2 right)
+        {
+            return left.Equals(right);
+        }
+
+        public static bool operator !=(Rect2 left, Rect2 right)
+        {
+            return !left.Equals(right);
+        }
+
+        public override bool Equals(object obj)
+        {
+            if (obj is Rect2)
+            {
+                return Equals((Rect2)obj);
+            }
+
+            return false;
+        }
+
+        public bool Equals(Rect2 other)
+        {
+            return position.Equals(other.position) && size.Equals(other.size);
+        }
+
+        public override int GetHashCode()
+        {
+            return position.GetHashCode() ^ size.GetHashCode();
+        }
+
+        public override string ToString()
+        {
+            return String.Format("({0}, {1})", new object[]
+            {
+                this.position.ToString(),
+                this.size.ToString()
+            });
+        }
+
+        public string ToString(string format)
+        {
+            return String.Format("({0}, {1})", new object[]
+            {
+                this.position.ToString(format),
+                this.size.ToString(format)
+            });
+        }
+    }
+}
\ No newline at end of file
diff --git a/modules/mono/glue/cs_files/Rect3.cs b/modules/mono/glue/cs_files/Rect3.cs
new file mode 100644
index 00000000000..0d25de1ec66
--- /dev/null
+++ b/modules/mono/glue/cs_files/Rect3.cs
@@ -0,0 +1,477 @@
+using System;
+
+// file: core/math/rect3.h
+// commit: 7ad14e7a3e6f87ddc450f7e34621eb5200808451
+// file: core/math/rect3.cpp
+// commit: bd282ff43f23fe845f29a3e25c8efc01bd65ffb0
+// file: core/variant_call.cpp
+// commit: 5ad9be4c24e9d7dc5672fdc42cea896622fe5685
+
+namespace Godot
+{
+    public struct Rect3 : IEquatable<Rect3>
+    {
+        private Vector3 position;
+        private Vector3 size;
+
+        public Vector3 Position
+        {
+            get
+            {
+                return position;
+            }
+        }
+
+        public Vector3 Size
+        {
+            get
+            {
+                return size;
+            }
+        }
+
+        public Vector3 End
+        {
+            get
+            {
+                return position + size;
+            }
+        }
+
+        public bool encloses(Rect3 with)
+        {
+            Vector3 src_min = position;
+            Vector3 src_max = position + size;
+            Vector3 dst_min = with.position;
+            Vector3 dst_max = with.position + with.size;
+
+            return ((src_min.x <= dst_min.x) &&
+                    (src_max.x > dst_max.x) &&
+                    (src_min.y <= dst_min.y) &&
+                    (src_max.y > dst_max.y) &&
+                    (src_min.z <= dst_min.z) &&
+                    (src_max.z > dst_max.z));
+        }
+
+        public Rect3 expand(Vector3 to_point)
+        {
+            Vector3 begin = position;
+            Vector3 end = position + size;
+
+            if (to_point.x < begin.x)
+                begin.x = to_point.x;
+            if (to_point.y < begin.y)
+                begin.y = to_point.y;
+            if (to_point.z < begin.z)
+                begin.z = to_point.z;
+
+            if (to_point.x > end.x)
+                end.x = to_point.x;
+            if (to_point.y > end.y)
+                end.y = to_point.y;
+            if (to_point.z > end.z)
+                end.z = to_point.z;
+
+            return new Rect3(begin, end - begin);
+        }
+
+        public float get_area()
+        {
+            return size.x * size.y * size.z;
+        }
+
+        public Vector3 get_endpoint(int idx)
+        {
+            switch (idx)
+            {
+                case 0:
+                    return new Vector3(position.x, position.y, position.z);
+                case 1:
+                    return new Vector3(position.x, position.y, position.z + size.z);
+                case 2:
+                    return new Vector3(position.x, position.y + size.y, position.z);
+                case 3:
+                    return new Vector3(position.x, position.y + size.y, position.z + size.z);
+                case 4:
+                    return new Vector3(position.x + size.x, position.y, position.z);
+                case 5:
+                    return new Vector3(position.x + size.x, position.y, position.z + size.z);
+                case 6:
+                    return new Vector3(position.x + size.x, position.y + size.y, position.z);
+                case 7:
+                    return new Vector3(position.x + size.x, position.y + size.y, position.z + size.z);
+                default:
+                    throw new ArgumentOutOfRangeException(nameof(idx), String.Format("Index is {0}, but a value from 0 to 7 is expected.", idx));
+            }
+        }
+
+        public Vector3 get_longest_axis()
+        {
+            Vector3 axis = new Vector3(1f, 0f, 0f);
+            float max_size = size.x;
+
+            if (size.y > max_size)
+            {
+                axis = new Vector3(0f, 1f, 0f);
+                max_size = size.y;
+            }
+
+            if (size.z > max_size)
+            {
+                axis = new Vector3(0f, 0f, 1f);
+                max_size = size.z;
+            }
+
+            return axis;
+        }
+
+        public Vector3.Axis get_longest_axis_index()
+        {
+            Vector3.Axis axis = Vector3.Axis.X;
+            float max_size = size.x;
+
+            if (size.y > max_size)
+            {
+                axis = Vector3.Axis.Y;
+                max_size = size.y;
+            }
+
+            if (size.z > max_size)
+            {
+                axis = Vector3.Axis.Z;
+                max_size = size.z;
+            }
+
+            return axis;
+        }
+
+        public float get_longest_axis_size()
+        {
+            float max_size = size.x;
+
+            if (size.y > max_size)
+                max_size = size.y;
+
+            if (size.z > max_size)
+                max_size = size.z;
+
+            return max_size;
+        }
+
+        public Vector3 get_shortest_axis()
+        {
+            Vector3 axis = new Vector3(1f, 0f, 0f);
+            float max_size = size.x;
+
+            if (size.y < max_size)
+            {
+                axis = new Vector3(0f, 1f, 0f);
+                max_size = size.y;
+            }
+
+            if (size.z < max_size)
+            {
+                axis = new Vector3(0f, 0f, 1f);
+                max_size = size.z;
+            }
+
+            return axis;
+        }
+
+        public Vector3.Axis get_shortest_axis_index()
+        {
+            Vector3.Axis axis = Vector3.Axis.X;
+            float max_size = size.x;
+
+            if (size.y < max_size)
+            {
+                axis = Vector3.Axis.Y;
+                max_size = size.y;
+            }
+
+            if (size.z < max_size)
+            {
+                axis = Vector3.Axis.Z;
+                max_size = size.z;
+            }
+
+            return axis;
+        }
+
+        public float get_shortest_axis_size()
+        {
+            float max_size = size.x;
+
+            if (size.y < max_size)
+                max_size = size.y;
+
+            if (size.z < max_size)
+                max_size = size.z;
+
+            return max_size;
+        }
+
+        public Vector3 get_support(Vector3 dir)
+        {
+            Vector3 half_extents = size * 0.5f;
+            Vector3 ofs = position + half_extents;
+
+            return ofs + new Vector3(
+                (dir.x > 0f) ? -half_extents.x : half_extents.x,
+                (dir.y > 0f) ? -half_extents.y : half_extents.y,
+                (dir.z > 0f) ? -half_extents.z : half_extents.z);
+        }
+
+        public Rect3 grow(float by)
+        {
+            Rect3 res = this;
+
+            res.position.x -= by;
+            res.position.y -= by;
+            res.position.z -= by;
+            res.size.x += 2.0f * by;
+            res.size.y += 2.0f * by;
+            res.size.z += 2.0f * by;
+
+            return res;
+        }
+
+        public bool has_no_area()
+        {
+            return size.x <= 0f || size.y <= 0f || size.z <= 0f;
+        }
+
+        public bool has_no_surface()
+        {
+            return size.x <= 0f && size.y <= 0f && size.z <= 0f;
+        }
+
+        public bool has_point(Vector3 point)
+        {
+            if (point.x < position.x)
+                return false;
+            if (point.y < position.y)
+                return false;
+            if (point.z < position.z)
+                return false;
+            if (point.x > position.x + size.x)
+                return false;
+            if (point.y > position.y + size.y)
+                return false;
+            if (point.z > position.z + size.z)
+                return false;
+
+            return true;
+        }
+
+        public Rect3 intersection(Rect3 with)
+        {
+            Vector3 src_min = position;
+            Vector3 src_max = position + size;
+            Vector3 dst_min = with.position;
+            Vector3 dst_max = with.position + with.size;
+
+            Vector3 min, max;
+
+            if (src_min.x > dst_max.x || src_max.x < dst_min.x)
+            {
+                return new Rect3();
+            }
+            else
+            {
+                min.x = (src_min.x > dst_min.x) ? src_min.x : dst_min.x;
+                max.x = (src_max.x < dst_max.x) ? src_max.x : dst_max.x;
+            }
+
+            if (src_min.y > dst_max.y || src_max.y < dst_min.y)
+            {
+                return new Rect3();
+            }
+            else
+            {
+                min.y = (src_min.y > dst_min.y) ? src_min.y : dst_min.y;
+                max.y = (src_max.y < dst_max.y) ? src_max.y : dst_max.y;
+            }
+
+            if (src_min.z > dst_max.z || src_max.z < dst_min.z)
+            {
+                return new Rect3();
+            }
+            else
+            {
+                min.z = (src_min.z > dst_min.z) ? src_min.z : dst_min.z;
+                max.z = (src_max.z < dst_max.z) ? src_max.z : dst_max.z;
+            }
+
+            return new Rect3(min, max - min);
+        }
+
+        public bool intersects(Rect3 with)
+        {
+            if (position.x >= (with.position.x + with.size.x))
+                return false;
+            if ((position.x + size.x) <= with.position.x)
+                return false;
+            if (position.y >= (with.position.y + with.size.y))
+                return false;
+            if ((position.y + size.y) <= with.position.y)
+                return false;
+            if (position.z >= (with.position.z + with.size.z))
+                return false;
+            if ((position.z + size.z) <= with.position.z)
+                return false;
+
+            return true;
+        }
+
+        public bool intersects_plane(Plane plane)
+        {
+            Vector3[] points =
+            {
+                new Vector3(position.x, position.y, position.z),
+                new Vector3(position.x, position.y, position.z + size.z),
+                new Vector3(position.x, position.y + size.y, position.z),
+                new Vector3(position.x, position.y + size.y, position.z + size.z),
+                new Vector3(position.x + size.x, position.y, position.z),
+                new Vector3(position.x + size.x, position.y, position.z + size.z),
+                new Vector3(position.x + size.x, position.y + size.y, position.z),
+                new Vector3(position.x + size.x, position.y + size.y, position.z + size.z),
+            };
+
+            bool over = false;
+            bool under = false;
+
+            for (int i = 0; i < 8; i++)
+            {
+                if (plane.distance_to(points[i]) > 0)
+                    over = true;
+                else
+                    under = true;
+            }
+
+            return under && over;
+        }
+
+        public bool intersects_segment(Vector3 from, Vector3 to)
+        {
+            float min = 0f;
+            float max = 1f;
+
+            for (int i = 0; i < 3; i++)
+            {
+                float seg_from = from[i];
+                float seg_to = to[i];
+                float box_begin = position[i];
+                float box_end = box_begin + size[i];
+                float cmin, cmax;
+
+                if (seg_from < seg_to)
+                {
+                    if (seg_from > box_end || seg_to < box_begin)
+                        return false;
+
+                    float length = seg_to - seg_from;
+                    cmin = seg_from < box_begin ? (box_begin - seg_from) / length : 0f;
+                    cmax = seg_to > box_end ? (box_end - seg_from) / length : 1f;
+                }
+                else
+                {
+                    if (seg_to > box_end || seg_from < box_begin)
+                        return false;
+
+                    float length = seg_to - seg_from;
+                    cmin = seg_from > box_end ? (box_end - seg_from) / length : 0f;
+                    cmax = seg_to < box_begin ? (box_begin - seg_from) / length : 1f;
+                }
+
+                if (cmin > min)
+                {
+                    min = cmin;
+                }
+
+                if (cmax < max)
+                    max = cmax;
+                if (max < min)
+                    return false;
+            }
+
+            return true;
+        }
+
+        public Rect3 merge(Rect3 with)
+        {
+            Vector3 beg_1 = position;
+            Vector3 beg_2 = with.position;
+            Vector3 end_1 = new Vector3(size.x, size.y, size.z) + beg_1;
+            Vector3 end_2 = new Vector3(with.size.x, with.size.y, with.size.z) + beg_2;
+
+            Vector3 min = new Vector3(
+                              (beg_1.x < beg_2.x) ? beg_1.x : beg_2.x,
+                              (beg_1.y < beg_2.y) ? beg_1.y : beg_2.y,
+                              (beg_1.z < beg_2.z) ? beg_1.z : beg_2.z
+                          );
+
+            Vector3 max = new Vector3(
+                              (end_1.x > end_2.x) ? end_1.x : end_2.x,
+                              (end_1.y > end_2.y) ? end_1.y : end_2.y,
+                              (end_1.z > end_2.z) ? end_1.z : end_2.z
+                          );
+
+            return new Rect3(min, max - min);
+        }
+
+        public Rect3(Vector3 position, Vector3 size)
+        {
+            this.position = position;
+            this.size = size;
+        }
+
+        public static bool operator ==(Rect3 left, Rect3 right)
+        {
+            return left.Equals(right);
+        }
+
+        public static bool operator !=(Rect3 left, Rect3 right)
+        {
+            return !left.Equals(right);
+        }
+
+        public override bool Equals(object obj)
+        {
+            if (obj is Rect3)
+            {
+                return Equals((Rect3)obj);
+            }
+
+            return false;
+        }
+
+        public bool Equals(Rect3 other)
+        {
+            return position == other.position && size == other.size;
+        }
+
+        public override int GetHashCode()
+        {
+            return position.GetHashCode() ^ size.GetHashCode();
+        }
+
+        public override string ToString()
+        {
+            return String.Format("{0} - {1}", new object[]
+                {
+                    this.position.ToString(),
+                    this.size.ToString()
+                });
+        }
+
+        public string ToString(string format)
+        {
+            return String.Format("{0} - {1}", new object[]
+                {
+                    this.position.ToString(format),
+                    this.size.ToString(format)
+                });
+        }
+    }
+}
diff --git a/modules/mono/glue/cs_files/SignalAwaiter.cs b/modules/mono/glue/cs_files/SignalAwaiter.cs
new file mode 100644
index 00000000000..19ccc26e798
--- /dev/null
+++ b/modules/mono/glue/cs_files/SignalAwaiter.cs
@@ -0,0 +1,59 @@
+using System;
+
+namespace Godot
+{
+    public class SignalAwaiter : IAwaiter<object[]>, IAwaitable<object[]>
+    {
+        private bool completed = false;
+        private object[] result = null;
+        private Action action = null;
+
+        public SignalAwaiter(Godot.Object source, string signal, Godot.Object target)
+        {
+            NativeCalls.godot_icall_Object_connect_signal_awaiter(
+                Godot.Object.GetPtr(source),
+                signal, Godot.Object.GetPtr(target), this
+                );
+        }
+
+        public bool IsCompleted
+        {
+            get
+            {
+                return completed;
+            }
+        }
+
+        public void OnCompleted(Action action)
+        {
+            this.action = action;
+        }
+
+        public object[] GetResult()
+        {
+            return result;
+        }
+
+        public IAwaiter<object[]> GetAwaiter()
+        {
+            return this;
+        }
+
+        internal void SignalCallback(object[] args)
+        {
+            completed = true;
+            result = args;
+
+            if (action != null)
+            {
+                action();
+            }
+        }
+
+        internal void FailureCallback()
+        {
+            action = null;
+            completed = true;
+        }
+    }
+}
diff --git a/modules/mono/glue/cs_files/StringExtensions.cs b/modules/mono/glue/cs_files/StringExtensions.cs
new file mode 100644
index 00000000000..96041827aa6
--- /dev/null
+++ b/modules/mono/glue/cs_files/StringExtensions.cs
@@ -0,0 +1,962 @@
+//using System;
+using System;
+using System.Collections.Generic;
+using System.Globalization;
+using System.Security;
+using System.Text;
+using System.Text.RegularExpressions;
+
+namespace Godot
+{
+    public static class StringExtensions
+    {
+        private static int get_slice_count(this string instance, string splitter)
+        {
+            if (instance.empty() || splitter.empty())
+                return 0;
+
+            int pos = 0;
+            int slices = 1;
+
+            while ((pos = instance.find(splitter, pos)) >= 0)
+            {
+                slices++;
+                pos += splitter.Length;
+            }
+
+            return slices;
+        }
+
+        private static string get_slicec(this string instance, char splitter, int slice)
+        {
+            if (!instance.empty() && slice >= 0)
+            {
+                int i = 0;
+                int prev = 0;
+                int count = 0;
+
+                while (true)
+                {
+                    if (instance[i] == 0 || instance[i] == splitter)
+                    {
+                        if (slice == count)
+                        {
+                            return instance.Substring(prev, i - prev);
+                        }
+                        else
+                        {
+                            count++;
+                            prev = i + 1;
+                        }
+                    }
+
+                    i++;
+                }
+            }
+
+            return string.Empty;
+        }
+
+        // <summary>
+        // If the string is a path to a file, return the path to the file without the extension.
+        // </summary>
+        public static string basename(this string instance)
+        {
+            int index = instance.LastIndexOf('.');
+
+            if (index > 0)
+                return instance.Substring(0, index);
+
+            return instance;
+        }
+
+        // <summary>
+        // Return true if the strings begins with the given string.
+        // </summary>
+        public static bool begins_with(this string instance, string text)
+        {
+            return instance.StartsWith(text);
+        }
+
+        // <summary>
+        // Return the bigrams (pairs of consecutive letters) of this string.
+        // </summary>
+        public static string[] bigrams(this string instance)
+        {
+            string[] b = new string[instance.Length - 1];
+
+            for (int i = 0; i < b.Length; i++)
+            {
+                b[i] = instance.Substring(i, 2);
+            }
+
+            return b;
+        }
+
+        // <summary>
+        // Return a copy of the string with special characters escaped using the C language standard.
+        // </summary>
+        public static string c_escape(this string instance)
+        {
+            StringBuilder sb = new StringBuilder(string.Copy(instance));
+
+            sb.Replace("\\", "\\\\");
+            sb.Replace("\a", "\\a");
+            sb.Replace("\b", "\\b");
+            sb.Replace("\f", "\\f");
+            sb.Replace("\n", "\\n");
+            sb.Replace("\r", "\\r");
+            sb.Replace("\t", "\\t");
+            sb.Replace("\v", "\\v");
+            sb.Replace("\'", "\\'");
+            sb.Replace("\"", "\\\"");
+            sb.Replace("?", "\\?");
+
+            return sb.ToString();
+        }
+
+        // <summary>
+        // Return a copy of the string with escaped characters replaced by their meanings according to the C language standard.
+        // </summary>
+        public static string c_unescape(this string instance)
+        {
+            StringBuilder sb = new StringBuilder(string.Copy(instance));
+
+            sb.Replace("\\a", "\a");
+            sb.Replace("\\b", "\b");
+            sb.Replace("\\f", "\f");
+            sb.Replace("\\n", "\n");
+            sb.Replace("\\r", "\r");
+            sb.Replace("\\t", "\t");
+            sb.Replace("\\v", "\v");
+            sb.Replace("\\'", "\'");
+            sb.Replace("\\\"", "\"");
+            sb.Replace("\\?", "?");
+            sb.Replace("\\\\", "\\");
+
+            return sb.ToString();
+        }
+
+        // <summary>
+        // Change the case of some letters. Replace underscores with spaces, convert all letters to lowercase then capitalize first and every letter following the space character. For [code]capitalize camelCase mixed_with_underscores[/code] it will return [code]Capitalize Camelcase Mixed With Underscores[/code].
+        // </summary>
+        public static string capitalize(this string instance)
+        {
+            string aux = instance.Replace("_", " ").ToLower();
+            string cap = string.Empty;
+
+            for (int i = 0; i < aux.get_slice_count(" "); i++)
+            {
+                string slice = aux.get_slicec(' ', i);
+                if (slice.Length > 0)
+                {
+                    slice = char.ToUpper(slice[0]) + slice.Substring(1);
+                    if (i > 0)
+                        cap += " ";
+                    cap += slice;
+                }
+            }
+
+            return cap;
+        }
+
+        // <summary>
+        // Perform a case-sensitive comparison to another string, return -1 if less, 0 if equal and +1 if greater.
+        // </summary>
+        public static int casecmp_to(this string instance, string to)
+        {
+            if (instance.empty())
+                return to.empty() ? 0 : -1;
+
+            if (to.empty())
+                return 1;
+
+            int instance_idx = 0;
+            int to_idx = 0;
+
+            while (true)
+            {
+                if (to[to_idx] == 0 && instance[instance_idx] == 0)
+                    return 0; // We're equal
+                else if (instance[instance_idx] == 0)
+                    return -1; // If this is empty, and the other one is not, then we're less... I think?
+                else if (to[to_idx] == 0)
+                    return 1; // Otherwise the other one is smaller...
+                else if (instance[instance_idx] < to[to_idx]) // More than
+                    return -1;
+                else if (instance[instance_idx] > to[to_idx]) // Less than
+                    return 1;
+
+                instance_idx++;
+                to_idx++;
+            }
+        }
+
+        // <summary>
+        // Return true if the string is empty.
+        // </summary>
+        public static bool empty(this string instance)
+        {
+            return string.IsNullOrEmpty(instance);
+        }
+
+        // <summary>
+        // Return true if the strings ends with the given string.
+        // </summary>
+        public static bool ends_with(this string instance, string text)
+        {
+            return instance.EndsWith(text);
+        }
+
+        // <summary>
+        // Erase [code]chars[/code] characters from the string starting from [code]pos[/code].
+        // </summary>
+        public static void erase(this StringBuilder instance, int pos, int chars)
+        {
+            instance.Remove(pos, chars);
+        }
+
+        // <summary>
+        // If the string is a path to a file, return the extension.
+        // </summary>
+        public static string extension(this string instance)
+        {
+            int pos = instance.find_last(".");
+
+            if (pos < 0)
+                return instance;
+
+            return instance.Substring(pos + 1, instance.Length);
+        }
+
+        // <summary>
+        // Find the first occurrence of a substring, return the starting position of the substring or -1 if not found. Optionally, the initial search index can be passed.
+        // </summary>
+        public static int find(this string instance, string what, int from = 0)
+        {
+            return instance.IndexOf(what, StringComparison.OrdinalIgnoreCase);
+        }
+
+        // <summary>
+        // Find the last occurrence of a substring, return the starting position of the substring or -1 if not found. Optionally, the initial search index can be passed.
+        // </summary>
+        public static int find_last(this string instance, string what)
+        {
+            return instance.LastIndexOf(what, StringComparison.OrdinalIgnoreCase);
+        }
+
+        // <summary>
+        // Find the first occurrence of a substring but search as case-insensitive, return the starting position of the substring or -1 if not found. Optionally, the initial search index can be passed.
+        // </summary>
+        public static int findn(this string instance, string what, int from = 0)
+        {
+            return instance.IndexOf(what, StringComparison.Ordinal);
+        }
+
+        // <summary>
+        // If the string is a path to a file, return the base directory.
+        // </summary>
+        public static string get_base_dir(this string instance)
+        {
+            int basepos = instance.find("://");
+
+            string rs = string.Empty;
+            string @base = string.Empty;
+
+            if (basepos != -1)
+            {
+                int end = basepos + 3;
+                rs = instance.Substring(end, instance.Length);
+                @base = instance.Substring(0, end);
+            }
+            else
+            {
+                if (instance.begins_with("/"))
+                {
+                    rs = instance.Substring(1, instance.Length);
+                    @base = "/";
+                }
+                else
+                {
+                    rs = instance;
+                }
+            }
+
+            int sep = Mathf.max(rs.find_last("/"), rs.find_last("\\"));
+
+            if (sep == -1)
+                return @base;
+
+            return @base + rs.substr(0, sep);
+        }
+
+        // <summary>
+        // If the string is a path to a file, return the file and ignore the base directory.
+        // </summary>
+        public static string get_file(this string instance)
+        {
+            int sep = Mathf.max(instance.find_last("/"), instance.find_last("\\"));
+
+            if (sep == -1)
+                return instance;
+
+            return instance.Substring(sep + 1, instance.Length);
+        }
+
+        // <summary>
+        // Hash the string and return a 32 bits integer.
+        // </summary>
+        public static int hash(this string instance)
+        {
+            int index = 0;
+            int hashv = 5381;
+            int c;
+
+            while ((c = (int)instance[index++]) != 0)
+                hashv = ((hashv << 5) + hashv) + c; // hash * 33 + c
+
+            return hashv;
+        }
+
+        // <summary>
+        // Convert a string containing an hexadecimal number into an int.
+        // </summary>
+        public static int hex_to_int(this string instance)
+        {
+            int sign = 1;
+
+            if (instance[0] == '-')
+            {
+                sign = -1;
+                instance = instance.Substring(1);
+            }
+
+            if (!instance.StartsWith("0x"))
+                return 0;
+
+            return sign * int.Parse(instance.Substring(2), NumberStyles.HexNumber);
+        }
+
+        // <summary>
+        // Insert a substring at a given position.
+        // </summary>
+        public static string insert(this string instance, int pos, string what)
+        {
+            return instance.Insert(pos, what);
+        }
+
+        // <summary>
+        // If the string is a path to a file or directory, return true if the path is absolute.
+        // </summary>
+        public static bool is_abs_path(this string instance)
+        {
+            return System.IO.Path.IsPathRooted(instance);
+        }
+
+        // <summary>
+        // If the string is a path to a file or directory, return true if the path is relative.
+        // </summary>
+        public static bool is_rel_path(this string instance)
+        {
+            return !System.IO.Path.IsPathRooted(instance);
+        }
+
+        // <summary>
+        // Check whether this string is a subsequence of the given string.
+        // </summary>
+        public static bool is_subsequence_of(this string instance, string text, bool case_insensitive)
+        {
+            int len = instance.Length;
+
+            if (len == 0)
+                return true; // Technically an empty string is subsequence of any string
+
+            if (len > text.Length)
+                return false;
+
+            int src = 0;
+            int tgt = 0;
+
+            while (instance[src] != 0 && text[tgt] != 0)
+            {
+                bool match = false;
+
+                if (case_insensitive)
+                {
+                    char srcc = char.ToLower(instance[src]);
+                    char tgtc = char.ToLower(text[tgt]);
+                    match = srcc == tgtc;
+                }
+                else
+                {
+                    match = instance[src] == text[tgt];
+                }
+                if (match)
+                {
+                    src++;
+                    if (instance[src] == 0)
+                        return true;
+                }
+
+                tgt++;
+            }
+
+            return false;
+        }
+
+        // <summary>
+        // Check whether this string is a subsequence of the given string, considering case.
+        // </summary>
+        public static bool is_subsequence_of(this string instance, string text)
+        {
+            return instance.is_subsequence_of(text, false);
+        }
+
+        // <summary>
+        // Check whether this string is a subsequence of the given string, without considering case.
+        // </summary>
+        public static bool is_subsequence_ofi(this string instance, string text)
+        {
+            return instance.is_subsequence_of(text, true);
+        }
+
+        // <summary>
+        // Check whether the string contains a valid float.
+        // </summary>
+        public static bool is_valid_float(this string instance)
+        {
+            float f;
+            return float.TryParse(instance, out f);
+        }
+
+        // <summary>
+        // Check whether the string contains a valid color in HTML notation.
+        // </summary>
+        public static bool is_valid_html_color(this string instance)
+        {
+            return Color.html_is_valid(instance);
+        }
+
+        // <summary>
+        // Check whether the string is a valid identifier. As is common in programming languages, a valid identifier may contain only letters, digits and underscores (_) and the first character may not be a digit.
+        // </summary>
+        public static bool is_valid_identifier(this string instance)
+        {
+            int len = instance.Length;
+
+            if (len == 0)
+                return false;
+
+            for (int i = 0; i < len; i++)
+            {
+                if (i == 0)
+                {
+                    if (instance[0] >= '0' && instance[0] <= '9')
+                        return false; // Don't start with number plz
+                }
+
+                bool valid_char = (instance[i] >= '0' && instance[i] <= '9') || (instance[i] >= 'a' && instance[i] <= 'z') || (instance[i] >= 'A' && instance[i] <= 'Z') || instance[i] == '_';
+
+                if (!valid_char)
+                    return false;
+            }
+
+            return true;
+        }
+
+        // <summary>
+        // Check whether the string contains a valid integer.
+        // </summary>
+        public static bool is_valid_integer(this string instance)
+        {
+            int f;
+            return int.TryParse(instance, out f);
+        }
+
+        // <summary>
+        // Check whether the string contains a valid IP address.
+        // </summary>
+        public static bool is_valid_ip_address(this string instance)
+        {
+            string[] ip = instance.split(".");
+
+            if (ip.Length != 4)
+                return false;
+
+            for (int i = 0; i < ip.Length; i++)
+            {
+                string n = ip[i];
+                if (!n.is_valid_integer())
+                    return false;
+
+                int val = n.to_int();
+                if (val < 0 || val > 255)
+                    return false;
+            }
+
+            return true;
+        }
+
+        // <summary>
+        // Return a copy of the string with special characters escaped using the JSON standard.
+        // </summary>
+        public static string json_escape(this string instance)
+        {
+            StringBuilder sb = new StringBuilder(string.Copy(instance));
+
+            sb.Replace("\\", "\\\\");
+            sb.Replace("\b", "\\b");
+            sb.Replace("\f", "\\f");
+            sb.Replace("\n", "\\n");
+            sb.Replace("\r", "\\r");
+            sb.Replace("\t", "\\t");
+            sb.Replace("\v", "\\v");
+            sb.Replace("\"", "\\\"");
+
+            return sb.ToString();
+        }
+
+        // <summary>
+        // Return an amount of characters from the left of the string.
+        // </summary>
+        public static string left(this string instance, int pos)
+        {
+            if (pos <= 0)
+                return string.Empty;
+
+            if (pos >= instance.Length)
+                return instance;
+
+            return instance.Substring(0, pos);
+        }
+
+        /// <summary>
+        /// Return the length of the string in characters.
+        /// </summary>
+        public static int length(this string instance)
+        {
+            return instance.Length;
+        }
+
+        // <summary>
+        // Do a simple expression match, where '*' matches zero or more arbitrary characters and '?' matches any single character except '.'.
+        // </summary>
+        public static bool expr_match(this string instance, string expr, bool case_sensitive)
+        {
+            if (expr.Length == 0 || instance.Length == 0)
+                return false;
+
+            switch (expr[0])
+            {
+                case '\0':
+                    return instance[0] == 0;
+                case '*':
+                    return expr_match(expr + 1, instance, case_sensitive) || (instance[0] != 0 && expr_match(expr, instance + 1, case_sensitive));
+                case '?':
+                    return instance[0] != 0 && instance[0] != '.' && expr_match(expr + 1, instance + 1, case_sensitive);
+                default:
+                    return (case_sensitive ? instance[0] == expr[0] : char.ToUpper(instance[0]) == char.ToUpper(expr[0])) &&
+                                expr_match(expr + 1, instance + 1, case_sensitive);
+            }
+        }
+
+        // <summary>
+        // Do a simple case sensitive expression match, using ? and * wildcards (see [method expr_match]).
+        // </summary>
+        public static bool match(this string instance, string expr)
+        {
+            return instance.expr_match(expr, true);
+        }
+
+        // <summary>
+        // Do a simple case insensitive expression match, using ? and * wildcards (see [method expr_match]).
+        // </summary>
+        public static bool matchn(this string instance, string expr)
+        {
+            return instance.expr_match(expr, false);
+        }
+
+        // <summary>
+        // Return the MD5 hash of the string as an array of bytes.
+        // </summary>
+        public static byte[] md5_buffer(this string instance)
+        {
+			return NativeCalls.godot_icall_String_md5_buffer(instance);
+        }
+
+        // <summary>
+        // Return the MD5 hash of the string as a string.
+        // </summary>
+        public static string md5_text(this string instance)
+        {
+			return NativeCalls.godot_icall_String_md5_text(instance);
+        }
+
+        // <summary>
+        // Perform a case-insensitive comparison to another string, return -1 if less, 0 if equal and +1 if greater.
+        // </summary>
+        public static int nocasecmp_to(this string instance, string to)
+        {
+            if (instance.empty())
+                return to.empty() ? 0 : -1;
+
+            if (to.empty())
+                return 1;
+
+            int instance_idx = 0;
+            int to_idx = 0;
+
+            while (true)
+            {
+                if (to[to_idx] == 0 && instance[instance_idx] == 0)
+                    return 0; // We're equal
+                else if (instance[instance_idx] == 0)
+                    return -1; // If this is empty, and the other one is not, then we're less... I think?
+                else if (to[to_idx] == 0)
+                    return 1; // Otherwise the other one is smaller..
+                else if (char.ToUpper(instance[instance_idx]) < char.ToUpper(to[to_idx])) // More than
+                    return -1;
+                else if (char.ToUpper(instance[instance_idx]) > char.ToUpper(to[to_idx])) // Less than
+                    return 1;
+
+                instance_idx++;
+                to_idx++;
+            }
+        }
+
+        // <summary>
+        // Return the character code at position [code]at[/code].
+        // </summary>
+        public static int ord_at(this string instance, int at)
+        {
+            return instance[at];
+        }
+
+        // <summary>
+        // Format a number to have an exact number of [code]digits[/code] after the decimal point.
+        // </summary>
+        public static string pad_decimals(this string instance, int digits)
+        {
+            int c = instance.find(".");
+
+            if (c == -1)
+            {
+                if (digits <= 0)
+                    return instance;
+
+                instance += ".";
+                c = instance.Length - 1;
+            }
+            else
+            {
+                if (digits <= 0)
+                    return instance.Substring(0, c);
+            }
+
+            if (instance.Length - (c + 1) > digits)
+            {
+                instance = instance.Substring(0, c + digits + 1);
+            }
+            else
+            {
+                while (instance.Length - (c + 1) < digits)
+                {
+                    instance += "0";
+                }
+            }
+
+            return instance;
+        }
+
+        // <summary>
+        // Format a number to have an exact number of [code]digits[/code] before the decimal point.
+        // </summary>
+        public static string pad_zeros(this string instance, int digits)
+        {
+            string s = instance;
+            int end = s.find(".");
+
+            if (end == -1)
+                end = s.Length;
+
+            if (end == 0)
+                return s;
+
+            int begin = 0;
+
+            while (begin < end && (s[begin] < '0' || s[begin] > '9'))
+            {
+                begin++;
+            }
+
+            if (begin >= end)
+                return s;
+
+            while (end - begin < digits)
+            {
+                s = s.Insert(begin, "0");
+                end++;
+            }
+
+            return s;
+        }
+
+        // <summary>
+        // Decode a percent-encoded string. See [method percent_encode].
+        // </summary>
+        public static string percent_decode(this string instance)
+        {
+            return Uri.UnescapeDataString(instance);
+        }
+
+        // <summary>
+        // Percent-encode a string. This is meant to encode parameters in a URL when sending a HTTP GET request and bodies of form-urlencoded POST request.
+        // </summary>
+        public static string percent_encode(this string instance)
+        {
+            return Uri.EscapeDataString(instance);
+        }
+
+        // <summary>
+        // If the string is a path, this concatenates [code]file[/code] at the end of the string as a subpath. E.g. [code]"this/is".plus_file("path") == "this/is/path"[/code].
+        // </summary>
+        public static string plus_file(this string instance, string file)
+        {
+            if (instance.Length > 0 && instance[instance.Length - 1] == '/')
+                return instance + file;
+            else
+                return instance + "/" + file;
+        }
+
+        // <summary>
+        // Replace occurrences of a substring for different ones inside the string.
+        // </summary>
+        public static string replace(this string instance, string what, string forwhat)
+        {
+            return instance.Replace(what, forwhat);
+        }
+
+        // <summary>
+        // Replace occurrences of a substring for different ones inside the string, but search case-insensitive.
+        // </summary>
+        public static string replacen(this string instance, string what, string forwhat)
+        {
+            return Regex.Replace(instance, what, forwhat, RegexOptions.IgnoreCase);
+        }
+
+        // <summary>
+        // Perform a search for a substring, but start from the end of the string instead of the beginning.
+        // </summary>
+        public static int rfind(this string instance, string what, int from = -1)
+        {
+			return NativeCalls.godot_icall_String_rfind(instance, what, from);
+        }
+
+        // <summary>
+        // Perform a search for a substring, but start from the end of the string instead of the beginning. Also search case-insensitive.
+        // </summary>
+        public static int rfindn(this string instance, string what, int from = -1)
+        {
+			return NativeCalls.godot_icall_String_rfindn(instance, what, from);
+        }
+
+        // <summary>
+        // Return the right side of the string from a given position.
+        // </summary>
+        public static string right(this string instance, int pos)
+        {
+            if (pos >= instance.Length)
+                return instance;
+
+            if (pos < 0)
+                return string.Empty;
+
+            return instance.Substring(pos, (instance.Length - pos));
+        }
+
+        public static byte[] sha256_buffer(this string instance)
+        {
+			return NativeCalls.godot_icall_String_sha256_buffer(instance);
+        }
+
+        // <summary>
+        // Return the SHA-256 hash of the string as a string.
+        // </summary>
+        public static string sha256_text(this string instance)
+        {
+			return NativeCalls.godot_icall_String_sha256_text(instance);
+        }
+
+        // <summary>
+        // Return the similarity index of the text compared to this string. 1 means totally similar and 0 means totally dissimilar.
+        // </summary>
+        public static float similarity(this string instance, string text)
+        {
+            if (instance == text)
+            {
+                // Equal strings are totally similar
+                return 1.0f;
+            }
+            if (instance.Length < 2 || text.Length < 2)
+            {
+                // No way to calculate similarity without a single bigram
+                return 0.0f;
+            }
+
+            string[] src_bigrams = instance.bigrams();
+            string[] tgt_bigrams = text.bigrams();
+
+            int src_size = src_bigrams.Length;
+            int tgt_size = tgt_bigrams.Length;
+
+            float sum = src_size + tgt_size;
+            float inter = 0;
+
+            for (int i = 0; i < src_size; i++)
+            {
+                for (int j = 0; j < tgt_size; j++)
+                {
+                    if (src_bigrams[i] == tgt_bigrams[j])
+                    {
+                        inter++;
+                        break;
+                    }
+                }
+            }
+
+            return (2.0f * inter) / sum;
+        }
+
+        // <summary>
+        // Split the string by a divisor string, return an array of the substrings. Example "One,Two,Three" will return ["One","Two","Three"] if split by ",".
+        // </summary>
+        public static string[] split(this string instance, string divisor, bool allow_empty = true)
+        {
+            return instance.Split(new string[] { divisor }, StringSplitOptions.RemoveEmptyEntries);
+        }
+
+        // <summary>
+        // Split the string in floats by using a divisor string, return an array of the substrings. Example "1,2.5,3" will return [1,2.5,3] if split by ",".
+        // </summary>
+        public static float[] split_floats(this string instance, string divisor, bool allow_empty = true)
+        {
+            List<float> ret = new List<float>();
+            int from = 0;
+            int len = instance.Length;
+
+            while (true)
+            {
+                int end = instance.find(divisor, from);
+                if (end < 0)
+                    end = len;
+                if (allow_empty || (end > from))
+                    ret.Add(float.Parse(instance.Substring(from)));
+                if (end == len)
+                    break;
+
+                from = end + divisor.Length;
+            }
+
+            return ret.ToArray();
+        }
+
+        private static readonly char[] non_printable = {
+            (char)00, (char)01, (char)02, (char)03, (char)04, (char)05,
+            (char)06, (char)07, (char)08, (char)09, (char)10, (char)11,
+            (char)12, (char)13, (char)14, (char)15, (char)16, (char)17,
+            (char)18, (char)19, (char)20, (char)21, (char)22, (char)23,
+            (char)24, (char)25, (char)26, (char)27, (char)28, (char)29,
+            (char)30, (char)31, (char)32
+        };
+
+        // <summary>
+        // Return a copy of the string stripped of any non-printable character at the beginning and the end. The optional arguments are used to toggle stripping on the left and right edges respectively.
+        // </summary>
+        public static string strip_edges(this string instance, bool left = true, bool right = true)
+        {
+            if (left)
+            {
+                if (right)
+                    return instance.Trim(non_printable);
+                else
+                    return instance.TrimStart(non_printable);
+            }
+            else
+            {
+                return instance.TrimEnd(non_printable);
+            }
+        }
+
+        // <summary>
+        // Return part of the string from the position [code]from[/code], with length [code]len[/code].
+        // </summary>
+        public static string substr(this string instance, int from, int len)
+        {
+            return instance.Substring(from, len);
+        }
+
+        // <summary>
+        // Convert the String (which is a character array) to PoolByteArray (which is an array of bytes). The conversion is speeded up in comparison to to_utf8() with the assumption that all the characters the String contains are only ASCII characters.
+        // </summary>
+        public static byte[] to_ascii(this string instance)
+        {
+            return Encoding.ASCII.GetBytes(instance);
+        }
+
+        // <summary>
+        // Convert a string, containing a decimal number, into a [code]float[/code].
+        // </summary>
+        public static float to_float(this string instance)
+        {
+            return float.Parse(instance);
+        }
+
+        // <summary>
+        // Convert a string, containing an integer number, into an [code]int[/code].
+        // </summary>
+        public static int to_int(this string instance)
+        {
+            return int.Parse(instance);
+        }
+
+        // <summary>
+        // Return the string converted to lowercase.
+        // </summary>
+        public static string to_lower(this string instance)
+        {
+            return instance.ToLower();
+        }
+
+        // <summary>
+        // Return the string converted to uppercase.
+        // </summary>
+        public static string to_upper(this string instance)
+        {
+            return instance.ToUpper();
+        }
+
+        // <summary>
+        // Convert the String (which is an array of characters) to PoolByteArray (which is an array of bytes). The conversion is a bit slower than to_ascii(), but supports all UTF-8 characters. Therefore, you should prefer this function over to_ascii().
+        // </summary>
+        public static byte[] to_utf8(this string instance)
+        {
+            return Encoding.UTF8.GetBytes(instance);
+        }
+
+        // <summary>
+        // Return a copy of the string with special characters escaped using the XML standard.
+        // </summary>
+        public static string xml_escape(this string instance)
+        {
+            return SecurityElement.Escape(instance);
+        }
+
+        // <summary>
+        // Return a copy of the string with escaped characters replaced by their meanings according to the XML standard.
+        // </summary>
+        public static string xml_unescape(this string instance)
+        {
+            return SecurityElement.FromString(instance).Text;
+        }
+    }
+}
diff --git a/modules/mono/glue/cs_files/ToolAttribute.cs b/modules/mono/glue/cs_files/ToolAttribute.cs
new file mode 100644
index 00000000000..0275982c7fc
--- /dev/null
+++ b/modules/mono/glue/cs_files/ToolAttribute.cs
@@ -0,0 +1,7 @@
+using System;
+
+namespace Godot
+{
+	[AttributeUsage(AttributeTargets.Class)]
+	public class ToolAttribute : Attribute {}
+}
diff --git a/modules/mono/glue/cs_files/Transform.cs b/modules/mono/glue/cs_files/Transform.cs
new file mode 100644
index 00000000000..2010f0b3aff
--- /dev/null
+++ b/modules/mono/glue/cs_files/Transform.cs
@@ -0,0 +1,168 @@
+using System;
+using System.Runtime.InteropServices;
+
+namespace Godot
+{
+    [StructLayout(LayoutKind.Sequential)]
+    public struct Transform : IEquatable<Transform>
+    {
+        public Basis basis;
+        public Vector3 origin;
+
+        public Transform affine_inverse()
+        {
+            Basis basisInv = basis.inverse();
+            return new Transform(basisInv, basisInv.xform(-origin));
+        }
+
+        public Transform inverse()
+        {
+            Basis basisTr = basis.transposed();
+            return new Transform(basisTr, basisTr.xform(-origin));
+        }
+
+        public Transform looking_at(Vector3 target, Vector3 up)
+        {
+            Transform t = this;
+            t.set_look_at(origin, target, up);
+            return t;
+        }
+
+        public Transform orthonormalized()
+        {
+            return new Transform(basis.orthonormalized(), origin);
+        }
+
+        public Transform rotated(Vector3 axis, float phi)
+        {
+            return this * new Transform(new Basis(axis, phi), new Vector3());
+        }
+
+        public Transform scaled(Vector3 scale)
+        {
+            return new Transform(basis.scaled(scale), origin * scale);
+        }
+
+        public void set_look_at(Vector3 eye, Vector3 target, Vector3 up)
+        {
+            // Make rotation matrix
+            // Z vector
+            Vector3 zAxis = eye - target;
+
+            zAxis.normalize();
+
+            Vector3 yAxis = up;
+
+            Vector3 xAxis = yAxis.cross(zAxis);
+
+            // Recompute Y = Z cross X
+            yAxis = zAxis.cross(xAxis);
+
+            xAxis.normalize();
+            yAxis.normalize();
+
+            basis = Basis.create_from_axes(xAxis, yAxis, zAxis);
+
+            origin = eye;
+        }
+
+        public Transform translated(Vector3 ofs)
+        {
+            return new Transform(basis, new Vector3
+            (
+                origin[0] += basis[0].dot(ofs),
+                origin[1] += basis[1].dot(ofs),
+                origin[2] += basis[2].dot(ofs)
+            ));
+        }
+
+        public Vector3 xform(Vector3 v)
+        {
+            return new Vector3
+            (
+                basis[0].dot(v) + origin.x,
+                basis[1].dot(v) + origin.y,
+                basis[2].dot(v) + origin.z
+            );
+        }
+
+        public Vector3 xform_inv(Vector3 v)
+        {
+            Vector3 vInv = v - origin;
+
+            return new Vector3
+            (
+                (basis[0, 0] * vInv.x) + (basis[1, 0] * vInv.y) + (basis[2, 0] * vInv.z),
+                (basis[0, 1] * vInv.x) + (basis[1, 1] * vInv.y) + (basis[2, 1] * vInv.z),
+                (basis[0, 2] * vInv.x) + (basis[1, 2] * vInv.y) + (basis[2, 2] * vInv.z)
+            );
+        }
+
+        public Transform(Vector3 xAxis, Vector3 yAxis, Vector3 zAxis, Vector3 origin)
+        {
+            this.basis = Basis.create_from_axes(xAxis, yAxis, zAxis);
+            this.origin = origin;
+        }
+
+        public Transform(Basis basis, Vector3 origin)
+        {
+            this.basis = basis;
+            this.origin = origin;
+        }
+
+        public static Transform operator *(Transform left, Transform right)
+        {
+            left.origin = left.xform(right.origin);
+            left.basis *= right.basis;
+            return left;
+        }
+
+        public static bool operator ==(Transform left, Transform right)
+        {
+            return left.Equals(right);
+        }
+
+        public static bool operator !=(Transform left, Transform right)
+        {
+            return !left.Equals(right);
+        }
+
+        public override bool Equals(object obj)
+        {
+            if (obj is Transform)
+            {
+                return Equals((Transform)obj);
+            }
+
+            return false;
+        }
+
+        public bool Equals(Transform other)
+        {
+            return basis.Equals(other.basis) && origin.Equals(other.origin);
+        }
+
+        public override int GetHashCode()
+        {
+            return basis.GetHashCode() ^ origin.GetHashCode();
+        }
+
+        public override string ToString()
+        {
+            return String.Format("{0} - {1}", new object[]
+            {
+                this.basis.ToString(),
+                this.origin.ToString()
+            });
+        }
+
+        public string ToString(string format)
+        {
+            return String.Format("{0} - {1}", new object[]
+            {
+                this.basis.ToString(format),
+                this.origin.ToString(format)
+            });
+        }
+    }
+}
diff --git a/modules/mono/glue/cs_files/Transform2D.cs b/modules/mono/glue/cs_files/Transform2D.cs
new file mode 100644
index 00000000000..526dc767c6d
--- /dev/null
+++ b/modules/mono/glue/cs_files/Transform2D.cs
@@ -0,0 +1,356 @@
+using System;
+using System.Runtime.InteropServices;
+
+namespace Godot
+{
+    [StructLayout(LayoutKind.Sequential)]
+    public struct Transform2D : IEquatable<Transform2D>
+    {
+        private static readonly Transform2D identity = new Transform2D
+        (
+            new Vector2(1f, 0f),
+            new Vector2(0f, 1f),
+            new Vector2(0f, 0f)
+        );
+
+        public Vector2 x;
+        public Vector2 y;
+        public Vector2 o;
+
+        public static Transform2D Identity
+        {
+            get { return identity; }
+        }
+
+        public Vector2 Origin
+        {
+            get { return o; }
+        }
+
+        public float Rotation
+        {
+            get { return Mathf.atan2(y.x, o.y); }
+        }
+
+        public Vector2 Scale
+        {
+            get { return new Vector2(x.length(), y.length()); }
+        }
+
+        public Vector2 this[int index]
+        {
+            get
+            {
+                switch (index)
+                {
+                    case 0:
+                        return x;
+                    case 1:
+                        return y;
+                    case 2:
+                        return o;
+                    default:
+                        throw new IndexOutOfRangeException();
+                }
+            }
+            set
+            {
+                switch (index)
+                {
+                    case 0:
+                        x = value;
+                        return;
+                    case 1:
+                        y = value;
+                        return;
+                    case 2:
+                        o = value;
+                        return;
+                    default:
+                        throw new IndexOutOfRangeException();
+                }
+            }
+        }
+
+
+        public float this[int index, int axis]
+        {
+            get
+            {
+                switch (index)
+                {
+                    case 0:
+                        return x[axis];
+                    case 1:
+                        return y[axis];
+                    default:
+                        throw new IndexOutOfRangeException();
+                }
+            }
+            set
+            {
+                switch (index)
+                {
+                    case 0:
+                        x[axis] = value;
+                        return;
+                    case 1:
+                        y[axis] = value;
+                        return;
+                    default:
+                        throw new IndexOutOfRangeException();
+                }
+            }
+        }
+
+        public Transform2D affine_inverse()
+        {
+            Transform2D inv = this;
+
+            float det = this[0, 0] * this[1, 1] - this[1, 0] * this[0, 1];
+
+            if (det == 0)
+            {
+                return new Transform2D
+                (
+                    float.NaN, float.NaN,
+                    float.NaN, float.NaN,
+                    float.NaN, float.NaN
+                );
+            }
+
+            float idet = 1.0f / det;
+
+            float temp = this[0, 0];
+            this[0, 0] = this[1, 1];
+            this[1, 1] = temp;
+
+            this[0] *= new Vector2(idet, -idet);
+            this[1] *= new Vector2(-idet, idet);
+
+            this[2] = basis_xform(-this[2]);
+
+            return inv;
+        }
+
+        public Vector2 basis_xform(Vector2 v)
+        {
+            return new Vector2(tdotx(v), tdoty(v));
+        }
+
+        public Vector2 basis_xform_inv(Vector2 v)
+        {
+            return new Vector2(x.dot(v), y.dot(v));
+        }
+
+        public Transform2D interpolate_with(Transform2D m, float c)
+        {
+            float r1 = Rotation;
+            float r2 = m.Rotation;
+
+            Vector2 s1 = Scale;
+            Vector2 s2 = m.Scale;
+
+            // Slerp rotation
+            Vector2 v1 = new Vector2(Mathf.cos(r1), Mathf.sin(r1));
+            Vector2 v2 = new Vector2(Mathf.cos(r2), Mathf.sin(r2));
+
+            float dot = v1.dot(v2);
+
+            // Clamp dot to [-1, 1]
+            dot = (dot < -1.0f) ? -1.0f : ((dot > 1.0f) ? 1.0f : dot);
+
+            Vector2 v = new Vector2();
+
+            if (dot > 0.9995f)
+            {
+                // Linearly interpolate to avoid numerical precision issues
+                v = v1.linear_interpolate(v2, c).normalized();
+            }
+            else
+            {
+                float angle = c * Mathf.acos(dot);
+                Vector2 v3 = (v2 - v1 * dot).normalized();
+                v = v1 * Mathf.cos(angle) + v3 * Mathf.sin(angle);
+            }
+
+            // Extract parameters
+            Vector2 p1 = Origin;
+            Vector2 p2 = m.Origin;
+
+            // Construct matrix
+            Transform2D res = new Transform2D(Mathf.atan2(v.y, v.x), p1.linear_interpolate(p2, c));
+            Vector2 scale = s1.linear_interpolate(s2, c);
+            res.x *= scale;
+            res.y *= scale;
+
+            return res;
+        }
+
+        public Transform2D inverse()
+        {
+            Transform2D inv = this;
+
+            // Swap
+            float temp = inv.x.y;
+            inv.x.y = inv.y.x;
+            inv.y.x = temp;
+
+            inv.o = inv.basis_xform(-inv.o);
+
+            return inv;
+        }
+
+        public Transform2D orthonormalized()
+        {
+            Transform2D on = this;
+
+            Vector2 onX = on.x;
+            Vector2 onY = on.y;
+
+            onX.normalize();
+            onY = onY - onX * (onX.dot(onY));
+            onY.normalize();
+
+            on.x = onX;
+            on.y = onY;
+
+            return on;
+        }
+
+        public Transform2D rotated(float phi)
+        {
+            return this * new Transform2D(phi, new Vector2());
+        }
+
+        public Transform2D scaled(Vector2 scale)
+        {
+            Transform2D copy = this;
+            copy.x *= scale;
+            copy.y *= scale;
+            copy.o *= scale;
+            return copy;
+        }
+
+        private float tdotx(Vector2 with)
+        {
+            return this[0, 0] * with[0] + this[1, 0] * with[1];
+        }
+
+        private float tdoty(Vector2 with)
+        {
+            return this[0, 1] * with[0] + this[1, 1] * with[1];
+        }
+
+        public Transform2D translated(Vector2 offset)
+        {
+            Transform2D copy = this;
+            copy.o += copy.basis_xform(offset);
+            return copy;
+        }
+
+        public Vector2 xform(Vector2 v)
+        {
+            return new Vector2(tdotx(v), tdoty(v)) + o;
+        }
+
+        public Vector2 xform_inv(Vector2 v)
+        {
+            Vector2 vInv = v - o;
+            return new Vector2(x.dot(vInv), y.dot(vInv));
+        }
+
+        public Transform2D(Vector2 xAxis, Vector2 yAxis, Vector2 origin)
+        {
+            this.x = xAxis;
+            this.y = yAxis;
+            this.o = origin;
+        }
+        public Transform2D(float xx, float xy, float yx, float yy, float ox, float oy)
+        {
+            this.x = new Vector2(xx, xy);
+            this.y = new Vector2(yx, yy);
+            this.o = new Vector2(ox, oy);
+        }
+
+        public Transform2D(float rot, Vector2 pos)
+        {
+            float cr = Mathf.cos(rot);
+            float sr = Mathf.sin(rot);
+            x.x = cr;
+            y.y = cr;
+            x.y = -sr;
+            y.x = sr;
+            o = pos;
+        }
+
+        public static Transform2D operator *(Transform2D left, Transform2D right)
+        {
+            left.o = left.xform(right.o);
+
+            float x0, x1, y0, y1;
+
+            x0 = left.tdotx(right.x);
+            x1 = left.tdoty(right.x);
+            y0 = left.tdotx(right.y);
+            y1 = left.tdoty(right.y);
+
+            left.x.x = x0;
+            left.x.y = x1;
+            left.y.x = y0;
+            left.y.y = y1;
+
+            return left;
+        }
+
+        public static bool operator ==(Transform2D left, Transform2D right)
+        {
+            return left.Equals(right);
+        }
+
+        public static bool operator !=(Transform2D left, Transform2D right)
+        {
+            return !left.Equals(right);
+        }
+
+        public override bool Equals(object obj)
+        {
+            if (obj is Transform2D)
+            {
+                return Equals((Transform2D)obj);
+            }
+
+            return false;
+        }
+
+        public bool Equals(Transform2D other)
+        {
+            return x.Equals(other.x) && y.Equals(other.y) && o.Equals(other.o);
+        }
+
+        public override int GetHashCode()
+        {
+            return x.GetHashCode() ^ y.GetHashCode() ^ o.GetHashCode();
+        }
+
+        public override string ToString()
+        {
+            return String.Format("({0}, {1}, {2})", new object[]
+            {
+                this.x.ToString(),
+                this.y.ToString(),
+                this.o.ToString()
+            });
+        }
+
+        public string ToString(string format)
+        {
+            return String.Format("({0}, {1}, {2})", new object[]
+            {
+                this.x.ToString(format),
+                this.y.ToString(format),
+                this.o.ToString(format)
+            });
+        }
+    }
+}
diff --git a/modules/mono/glue/cs_files/Vector2.cs b/modules/mono/glue/cs_files/Vector2.cs
new file mode 100644
index 00000000000..28fedc365be
--- /dev/null
+++ b/modules/mono/glue/cs_files/Vector2.cs
@@ -0,0 +1,362 @@
+using System;
+using System.Runtime.InteropServices;
+
+// file: core/math/math_2d.h
+// commit: 7ad14e7a3e6f87ddc450f7e34621eb5200808451
+// file: core/math/math_2d.cpp
+// commit: 7ad14e7a3e6f87ddc450f7e34621eb5200808451
+// file: core/variant_call.cpp
+// commit: 5ad9be4c24e9d7dc5672fdc42cea896622fe5685
+
+namespace Godot
+{
+    [StructLayout(LayoutKind.Sequential)]
+    public struct Vector2 : IEquatable<Vector2>
+    {
+        public float x;
+        public float y;
+
+        public float this[int index]
+        {
+            get
+            {
+                switch (index)
+                {
+                    case 0:
+                        return x;
+                    case 1:
+                        return y;
+                    default:
+                        throw new IndexOutOfRangeException();
+                }
+            }
+            set
+            {
+                switch (index)
+                {
+                    case 0:
+                        x = value;
+                        return;
+                    case 1:
+                        y = value;
+                        return;
+                    default:
+                        throw new IndexOutOfRangeException();
+                }
+            }
+        }
+
+        internal void normalize()
+        {
+            float length = x * x + y * y;
+
+            if (length != 0f)
+            {
+                length = Mathf.sqrt(length);
+                x /= length;
+                y /= length;
+            }
+        }
+
+        private float cross(Vector2 b)
+        {
+            return x * b.y - y * b.x;
+        }
+
+        public Vector2 abs()
+        {
+            return new Vector2(Mathf.abs(x), Mathf.abs(y));
+        }
+
+        public float angle()
+        {
+            return Mathf.atan2(y, x);
+        }
+
+        public float angle_to(Vector2 to)
+        {
+            return Mathf.atan2(cross(to), dot(to));
+        }
+
+        public float angle_to_point(Vector2 to)
+        {
+            return Mathf.atan2(x - to.x, y - to.y);
+        }
+
+        public float aspect()
+        {
+            return x / y;
+        }
+
+        public Vector2 bounce(Vector2 n)
+        {
+            return -reflect(n);
+        }
+
+        public Vector2 clamped(float length)
+        {
+            Vector2 v = this;
+            float l = this.length();
+
+            if (l > 0 && length < l)
+            {
+                v /= l;
+                v *= length;
+            }
+
+            return v;
+        }
+
+        public Vector2 cubic_interpolate(Vector2 b, Vector2 preA, Vector2 postB, float t)
+        {
+            Vector2 p0 = preA;
+            Vector2 p1 = this;
+            Vector2 p2 = b;
+            Vector2 p3 = postB;
+
+            float t2 = t * t;
+            float t3 = t2 * t;
+
+            return 0.5f * ((p1 * 2.0f) +
+                                (-p0 + p2) * t +
+                                (2.0f * p0 - 5.0f * p1 + 4 * p2 - p3) * t2 +
+                                (-p0 + 3.0f * p1 - 3.0f * p2 + p3) * t3);
+        }
+
+        public float distance_squared_to(Vector2 to)
+        {
+            return (x - to.x) * (x - to.x) + (y - to.y) * (y - to.y);
+        }
+
+        public float distance_to(Vector2 to)
+        {
+            return Mathf.sqrt((x - to.x) * (x - to.x) + (y - to.y) * (y - to.y));
+        }
+
+        public float dot(Vector2 with)
+        {
+            return x * with.x + y * with.y;
+        }
+
+        public Vector2 floor()
+        {
+            return new Vector2(Mathf.floor(x), Mathf.floor(y));
+        }
+
+        public bool is_normalized()
+        {
+            return Mathf.abs(length_squared() - 1.0f) < Mathf.Epsilon;
+        }
+
+        public float length()
+        {
+            return Mathf.sqrt(x * x + y * y);
+        }
+
+        public float length_squared()
+        {
+            return x * x + y * y;
+        }
+
+        public Vector2 linear_interpolate(Vector2 b, float t)
+        {
+            Vector2 res = this;
+
+            res.x += (t * (b.x - x));
+            res.y += (t * (b.y - y));
+
+            return res;
+        }
+
+        public Vector2 normalized()
+        {
+            Vector2 result = this;
+            result.normalize();
+            return result;
+        }
+
+        public Vector2 reflect(Vector2 n)
+        {
+            return 2.0f * n * dot(n) - this;
+        }
+
+        public Vector2 rotated(float phi)
+        {
+            float rads = angle() + phi;
+            return new Vector2(Mathf.cos(rads), Mathf.sin(rads)) * length();
+        }
+
+        public Vector2 slide(Vector2 n)
+        {
+            return this - n * dot(n);
+        }
+
+        public Vector2 snapped(Vector2 by)
+        {
+            return new Vector2(Mathf.stepify(x, by.x), Mathf.stepify(y, by.y));
+        }
+
+        public Vector2 tangent()
+        {
+            return new Vector2(y, -x);
+        }
+
+        public Vector2(float x, float y)
+        {
+            this.x = x;
+            this.y = y;
+        }
+
+        public static Vector2 operator +(Vector2 left, Vector2 right)
+        {
+            left.x += right.x;
+            left.y += right.y;
+            return left;
+        }
+
+        public static Vector2 operator -(Vector2 left, Vector2 right)
+        {
+            left.x -= right.x;
+            left.y -= right.y;
+            return left;
+        }
+
+        public static Vector2 operator -(Vector2 vec)
+        {
+            vec.x = -vec.x;
+            vec.y = -vec.y;
+            return vec;
+        }
+
+        public static Vector2 operator *(Vector2 vec, float scale)
+        {
+            vec.x *= scale;
+            vec.y *= scale;
+            return vec;
+        }
+
+        public static Vector2 operator *(float scale, Vector2 vec)
+        {
+            vec.x *= scale;
+            vec.y *= scale;
+            return vec;
+        }
+
+        public static Vector2 operator *(Vector2 left, Vector2 right)
+        {
+            left.x *= right.x;
+            left.y *= right.y;
+            return left;
+        }
+
+        public static Vector2 operator /(Vector2 vec, float scale)
+        {
+            vec.x /= scale;
+            vec.y /= scale;
+            return vec;
+        }
+
+        public static Vector2 operator /(Vector2 left, Vector2 right)
+        {
+            left.x /= right.x;
+            left.y /= right.y;
+            return left;
+        }
+
+        public static bool operator ==(Vector2 left, Vector2 right)
+        {
+            return left.Equals(right);
+        }
+
+        public static bool operator !=(Vector2 left, Vector2 right)
+        {
+            return !left.Equals(right);
+        }
+
+        public static bool operator <(Vector2 left, Vector2 right)
+        {
+            if (left.x.Equals(right.x))
+            {
+                return left.y < right.y;
+            }
+            else
+            {
+                return left.x < right.x;
+            }
+        }
+
+        public static bool operator >(Vector2 left, Vector2 right)
+        {
+            if (left.x.Equals(right.x))
+            {
+                return left.y > right.y;
+            }
+            else
+            {
+                return left.x > right.x;
+            }
+        }
+
+        public static bool operator <=(Vector2 left, Vector2 right)
+        {
+            if (left.x.Equals(right.x))
+            {
+                return left.y <= right.y;
+            }
+            else
+            {
+                return left.x <= right.x;
+            }
+        }
+
+        public static bool operator >=(Vector2 left, Vector2 right)
+        {
+            if (left.x.Equals(right.x))
+            {
+                return left.y >= right.y;
+            }
+            else
+            {
+                return left.x >= right.x;
+            }
+        }
+
+        public override bool Equals(object obj)
+        {
+            if (obj is Vector2)
+            {
+                return Equals((Vector2)obj);
+            }
+
+            return false;
+        }
+
+        public bool Equals(Vector2 other)
+        {
+            return x == other.x && y == other.y;
+        }
+
+        public override int GetHashCode()
+        {
+            return y.GetHashCode() ^ x.GetHashCode();
+        }
+
+        public override string ToString()
+        {
+            return String.Format("({0}, {1})", new object[]
+            {
+                this.x.ToString(),
+                this.y.ToString()
+            });
+        }
+
+        public string ToString(string format)
+        {
+            return String.Format("({0}, {1})", new object[]
+            {
+                this.x.ToString(format),
+                this.y.ToString(format)
+            });
+        }
+    }
+}
diff --git a/modules/mono/glue/cs_files/Vector3.cs b/modules/mono/glue/cs_files/Vector3.cs
new file mode 100644
index 00000000000..c023cd83cf8
--- /dev/null
+++ b/modules/mono/glue/cs_files/Vector3.cs
@@ -0,0 +1,420 @@
+using System;
+using System.Runtime.InteropServices;
+
+// file: core/math/vector3.h
+// commit: bd282ff43f23fe845f29a3e25c8efc01bd65ffb0
+// file: core/math/vector3.cpp
+// commit: 7ad14e7a3e6f87ddc450f7e34621eb5200808451
+// file: core/variant_call.cpp
+// commit: 5ad9be4c24e9d7dc5672fdc42cea896622fe5685
+
+namespace Godot
+{
+    [StructLayout(LayoutKind.Sequential)]
+    public struct Vector3 : IEquatable<Vector3>
+    {
+        public enum Axis
+        {
+            X = 0,
+            Y,
+            Z
+        }
+
+        public float x;
+        public float y;
+        public float z;
+
+        public float this[int index]
+        {
+            get
+            {
+                switch (index)
+                {
+                    case 0:
+                        return x;
+                    case 1:
+                        return y;
+                    case 2:
+                        return z;
+                    default:
+                        throw new IndexOutOfRangeException();
+                }
+            }
+            set
+            {
+                switch (index)
+                {
+                    case 0:
+                        x = value;
+                        return;
+                    case 1:
+                        y = value;
+                        return;
+                    case 2:
+                        z = value;
+                        return;
+                    default:
+                        throw new IndexOutOfRangeException();
+                }
+            }
+        }
+
+        internal void normalize()
+        {
+            float length = this.length();
+
+            if (length == 0f)
+            {
+                x = y = z = 0f;
+            }
+            else
+            {
+                x /= length;
+                y /= length;
+                z /= length;
+            }
+        }
+
+        public Vector3 abs()
+        {
+            return new Vector3(Mathf.abs(x), Mathf.abs(y), Mathf.abs(z));
+        }
+
+        public float angle_to(Vector3 to)
+        {
+            return Mathf.atan2(cross(to).length(), dot(to));
+        }
+
+        public Vector3 bounce(Vector3 n)
+        {
+            return -reflect(n);
+        }
+
+        public Vector3 ceil()
+        {
+            return new Vector3(Mathf.ceil(x), Mathf.ceil(y), Mathf.ceil(z));
+        }
+
+        public Vector3 cross(Vector3 b)
+        {
+            return new Vector3
+            (
+                (y * b.z) - (z * b.y),
+                (z * b.x) - (x * b.z),
+                (x * b.y) - (y * b.x)
+            );
+        }
+
+        public Vector3 cubic_interpolate(Vector3 b, Vector3 preA, Vector3 postB, float t)
+        {
+            Vector3 p0 = preA;
+            Vector3 p1 = this;
+            Vector3 p2 = b;
+            Vector3 p3 = postB;
+
+            float t2 = t * t;
+            float t3 = t2 * t;
+
+            return 0.5f * (
+                        (p1 * 2.0f) + (-p0 + p2) * t +
+                        (2.0f * p0 - 5.0f * p1 + 4f * p2 - p3) * t2 +
+                        (-p0 + 3.0f * p1 - 3.0f * p2 + p3) * t3
+                    );
+        }
+
+        public float distance_squared_to(Vector3 b)
+        {
+            return (b - this).length_squared();
+        }
+
+        public float distance_to(Vector3 b)
+        {
+            return (b - this).length();
+        }
+
+        public float dot(Vector3 b)
+        {
+            return x * b.x + y * b.y + z * b.z;
+        }
+
+        public Vector3 floor()
+        {
+            return new Vector3(Mathf.floor(x), Mathf.floor(y), Mathf.floor(z));
+        }
+
+        public Vector3 inverse()
+        {
+            return new Vector3(1.0f / x, 1.0f / y, 1.0f / z);
+        }
+
+        public bool is_normalized()
+        {
+            return Mathf.abs(length_squared() - 1.0f) < Mathf.Epsilon;
+        }
+
+        public float length()
+        {
+            float x2 = x * x;
+            float y2 = y * y;
+            float z2 = z * z;
+
+            return Mathf.sqrt(x2 + y2 + z2);
+        }
+
+        public float length_squared()
+        {
+            float x2 = x * x;
+            float y2 = y * y;
+            float z2 = z * z;
+
+            return x2 + y2 + z2;
+        }
+
+        public Vector3 linear_interpolate(Vector3 b, float t)
+        {
+            return new Vector3
+            (
+                x + (t * (b.x - x)),
+                y + (t * (b.y - y)),
+                z + (t * (b.z - z))
+            );
+        }
+
+        public Axis max_axis()
+        {
+            return x < y ? (y < z ? Axis.Z : Axis.Y) : (x < z ? Axis.Z : Axis.X);
+        }
+
+        public Axis min_axis()
+        {
+            return x < y ? (x < z ? Axis.X : Axis.Z) : (y < z ? Axis.Y : Axis.Z);
+        }
+
+        public Vector3 normalized()
+        {
+            Vector3 v = this;
+            v.normalize();
+            return v;
+        }
+
+        public Basis outer(Vector3 b)
+        {
+            return new Basis(
+                new Vector3(x * b.x, x * b.y, x * b.z),
+                new Vector3(y * b.x, y * b.y, y * b.z),
+                new Vector3(z * b.x, z * b.y, z * b.z)
+            );
+        }
+
+        public Vector3 reflect(Vector3 n)
+        {
+#if DEBUG
+            if (!n.is_normalized())
+                throw new ArgumentException(String.Format("{0} is not normalized", n), nameof(n));
+#endif
+            return 2.0f * n * dot(n) - this;
+        }
+
+        public Vector3 rotated(Vector3 axis, float phi)
+        {
+            return new Basis(axis, phi).xform(this);
+        }
+
+        public Vector3 slide(Vector3 n)
+        {
+            return this - n * dot(n);
+        }
+
+        public Vector3 snapped(Vector3 by)
+        {
+            return new Vector3
+            (
+                Mathf.stepify(x, by.x),
+                Mathf.stepify(y, by.y),
+                Mathf.stepify(z, by.z)
+            );
+        }
+
+        public Basis to_diagonal_matrix()
+        {
+            return new Basis(
+                x, 0f, 0f,
+                0f, y, 0f,
+                0f, 0f, z
+            );
+        }
+
+        public Vector3(float x, float y, float z)
+        {
+            this.x = x;
+            this.y = y;
+            this.z = z;
+        }
+
+        public static Vector3 operator +(Vector3 left, Vector3 right)
+        {
+            left.x += right.x;
+            left.y += right.y;
+            left.z += right.z;
+            return left;
+        }
+
+        public static Vector3 operator -(Vector3 left, Vector3 right)
+        {
+            left.x -= right.x;
+            left.y -= right.y;
+            left.z -= right.z;
+            return left;
+        }
+
+        public static Vector3 operator -(Vector3 vec)
+        {
+            vec.x = -vec.x;
+            vec.y = -vec.y;
+            vec.z = -vec.z;
+            return vec;
+        }
+
+        public static Vector3 operator *(Vector3 vec, float scale)
+        {
+            vec.x *= scale;
+            vec.y *= scale;
+            vec.z *= scale;
+            return vec;
+        }
+
+        public static Vector3 operator *(float scale, Vector3 vec)
+        {
+            vec.x *= scale;
+            vec.y *= scale;
+            vec.z *= scale;
+            return vec;
+        }
+
+        public static Vector3 operator *(Vector3 left, Vector3 right)
+        {
+            left.x *= right.x;
+            left.y *= right.y;
+            left.z *= right.z;
+            return left;
+        }
+
+        public static Vector3 operator /(Vector3 vec, float scale)
+        {
+            vec.x /= scale;
+            vec.y /= scale;
+            vec.z /= scale;
+            return vec;
+        }
+
+        public static Vector3 operator /(Vector3 left, Vector3 right)
+        {
+            left.x /= right.x;
+            left.y /= right.y;
+            left.z /= right.z;
+            return left;
+        }
+
+        public static bool operator ==(Vector3 left, Vector3 right)
+        {
+            return left.Equals(right);
+        }
+
+        public static bool operator !=(Vector3 left, Vector3 right)
+        {
+            return !left.Equals(right);
+        }
+
+        public static bool operator <(Vector3 left, Vector3 right)
+        {
+            if (left.x == right.x)
+            {
+                if (left.y == right.y)
+                    return left.z < right.z;
+                else
+                    return left.y < right.y;
+            }
+
+            return left.x < right.x;
+        }
+
+        public static bool operator >(Vector3 left, Vector3 right)
+        {
+            if (left.x == right.x)
+            {
+                if (left.y == right.y)
+                    return left.z > right.z;
+                else
+                    return left.y > right.y;
+            }
+
+            return left.x > right.x;
+        }
+
+        public static bool operator <=(Vector3 left, Vector3 right)
+        {
+            if (left.x == right.x)
+            {
+                if (left.y == right.y)
+                    return left.z <= right.z;
+                else
+                    return left.y < right.y;
+            }
+
+            return left.x < right.x;
+        }
+
+        public static bool operator >=(Vector3 left, Vector3 right)
+        {
+            if (left.x == right.x)
+            {
+                if (left.y == right.y)
+                    return left.z >= right.z;
+                else
+                    return left.y > right.y;
+            }
+
+            return left.x > right.x;
+        }
+
+        public override bool Equals(object obj)
+        {
+            if (obj is Vector3)
+            {
+                return Equals((Vector3)obj);
+            }
+
+            return false;
+        }
+
+        public bool Equals(Vector3 other)
+        {
+            return x == other.x && y == other.y && z == other.z;
+        }
+
+        public override int GetHashCode()
+        {
+            return y.GetHashCode() ^ x.GetHashCode() ^ z.GetHashCode();
+        }
+
+        public override string ToString()
+        {
+            return String.Format("({0}, {1}, {2})", new object[]
+            {
+                this.x.ToString(),
+                this.y.ToString(),
+                this.z.ToString()
+            });
+        }
+
+        public string ToString(string format)
+        {
+            return String.Format("({0}, {1}, {2})", new object[]
+            {
+                this.x.ToString(format),
+                this.y.ToString(format),
+                this.z.ToString(format)
+            });
+        }
+    }
+}
diff --git a/modules/mono/glue/glue_header.h b/modules/mono/glue/glue_header.h
new file mode 100644
index 00000000000..0751a0160f3
--- /dev/null
+++ b/modules/mono/glue/glue_header.h
@@ -0,0 +1,302 @@
+/*************************************************************************/
+/*  glue_header.h                                                        */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2017 Godot Engine contributors (cf. AUTHORS.md)    */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+#include "../csharp_script.h"
+#include "../mono_gd/gd_mono_class.h"
+#include "../mono_gd/gd_mono_internals.h"
+#include "../mono_gd/gd_mono_marshal.h"
+#include "../signal_awaiter_utils.h"
+
+#include "bind/core_bind.h"
+#include "class_db.h"
+#include "io/marshalls.h"
+#include "object.h"
+#include "os/os.h"
+#include "project_settings.h"
+#include "reference.h"
+#include "variant_parser.h"
+
+#ifdef TOOLS_ENABLED
+#include "editor/editor_node.h"
+#endif
+
+#define GODOTSHARP_INSTANCE_OBJECT(m_instance, m_type) \
+	static ClassDB::ClassInfo *ci = NULL;              \
+	if (!ci) {                                         \
+		ci = ClassDB::classes.getptr(m_type);          \
+	}                                                  \
+	Object *m_instance = ci->creation_func();
+
+void godot_icall_Object_Dtor(Object *ptr) {
+	ERR_FAIL_NULL(ptr);
+	_GodotSharp::get_singleton()->queue_dispose(ptr);
+}
+
+// -- ClassDB --
+
+MethodBind *godot_icall_ClassDB_get_method(MonoString *p_type, MonoString *p_method) {
+	StringName type(GDMonoMarshal::mono_string_to_godot(p_type));
+	StringName method(GDMonoMarshal::mono_string_to_godot(p_method));
+	return ClassDB::get_method(type, method);
+}
+
+// -- SignalAwaiter --
+
+Error godot_icall_Object_connect_signal_awaiter(Object *p_source, MonoString *p_signal, Object *p_target, MonoObject *p_awaiter) {
+	String signal = GDMonoMarshal::mono_string_to_godot(p_signal);
+	return SignalAwaiterUtils::connect_signal_awaiter(p_source, signal, p_target, p_awaiter);
+}
+
+// -- NodePath --
+
+NodePath *godot_icall_NodePath_Ctor(MonoString *p_path) {
+	return memnew(NodePath(GDMonoMarshal::mono_string_to_godot(p_path)));
+}
+
+void godot_icall_NodePath_Dtor(NodePath *p_ptr) {
+	ERR_FAIL_NULL(p_ptr);
+	_GodotSharp::get_singleton()->queue_dispose(p_ptr);
+}
+
+MonoString *godot_icall_NodePath_operator_String(NodePath *p_np) {
+	return GDMonoMarshal::mono_string_from_godot(p_np->operator String());
+}
+
+MonoArray *godot_icall_String_md5_buffer(MonoString *p_str) {
+	Vector<uint8_t> ret = GDMonoMarshal::mono_string_to_godot(p_str).md5_buffer();
+	// TODO Check possible Array/Vector<uint8_t> problem?
+	return GDMonoMarshal::Array_to_mono_array(Variant(ret));
+}
+
+// -- RID --
+
+RID *godot_icall_RID_Ctor(Object *p_from) {
+	Resource *res_from = Object::cast_to<Resource>(p_from);
+
+	if (res_from)
+		return memnew(RID(res_from->get_rid()));
+
+	return memnew(RID);
+}
+
+void godot_icall_RID_Dtor(RID *p_ptr) {
+	ERR_FAIL_NULL(p_ptr);
+	_GodotSharp::get_singleton()->queue_dispose(p_ptr);
+}
+
+// -- String --
+
+MonoString *godot_icall_String_md5_text(MonoString *p_str) {
+	String ret = GDMonoMarshal::mono_string_to_godot(p_str).md5_text();
+	return GDMonoMarshal::mono_string_from_godot(ret);
+}
+
+int godot_icall_String_rfind(MonoString *p_str, MonoString *p_what, int p_from) {
+	String what = GDMonoMarshal::mono_string_to_godot(p_what);
+	return GDMonoMarshal::mono_string_to_godot(p_str).rfind(what, p_from);
+}
+
+int godot_icall_String_rfindn(MonoString *p_str, MonoString *p_what, int p_from) {
+	String what = GDMonoMarshal::mono_string_to_godot(p_what);
+	return GDMonoMarshal::mono_string_to_godot(p_str).rfindn(what, p_from);
+}
+
+MonoArray *godot_icall_String_sha256_buffer(MonoString *p_str) {
+	Vector<uint8_t> ret = GDMonoMarshal::mono_string_to_godot(p_str).sha256_buffer();
+	return GDMonoMarshal::Array_to_mono_array(Variant(ret));
+}
+
+MonoString *godot_icall_String_sha256_text(MonoString *p_str) {
+	String ret = GDMonoMarshal::mono_string_to_godot(p_str).sha256_text();
+	return GDMonoMarshal::mono_string_from_godot(ret);
+}
+
+// -- Global Scope --
+
+MonoObject *godot_icall_Godot_bytes2var(MonoArray *p_bytes) {
+	Variant ret;
+	PoolByteArray varr = GDMonoMarshal::mono_array_to_PoolByteArray(p_bytes);
+	PoolByteArray::Read r = varr.read();
+	Error err = decode_variant(ret, r.ptr(), varr.size(), NULL);
+	if (err != OK) {
+		ret = RTR("Not enough bytes for decoding bytes, or invalid format.");
+	}
+	return GDMonoMarshal::variant_to_mono_object(ret);
+}
+
+MonoObject *godot_icall_Godot_convert(MonoObject *p_what, int p_type) {
+	Variant what = GDMonoMarshal::mono_object_to_variant(p_what);
+	const Variant *args[1] = { &what };
+	Variant::CallError ce;
+	Variant ret = Variant::construct(Variant::Type(p_type), args, 1, ce);
+	ERR_FAIL_COND_V(ce.error != Variant::CallError::CALL_OK, NULL);
+	return GDMonoMarshal::variant_to_mono_object(ret);
+}
+
+int godot_icall_Godot_hash(MonoObject *p_var) {
+	return GDMonoMarshal::mono_object_to_variant(p_var).hash();
+}
+
+MonoObject *godot_icall_Godot_instance_from_id(int p_instance_id) {
+	return GDMonoUtils::unmanaged_get_managed(ObjectDB::get_instance(p_instance_id));
+}
+
+void godot_icall_Godot_print(MonoArray *p_what) {
+	Array what = GDMonoMarshal::mono_array_to_Array(p_what);
+	String str;
+	for (int i = 0; i < what.size(); i++)
+		str += what[i].operator String();
+	print_line(str);
+}
+
+void godot_icall_Godot_printerr(MonoArray *p_what) {
+	Array what = GDMonoMarshal::mono_array_to_Array(p_what);
+	String str;
+	for (int i = 0; i < what.size(); i++)
+		str += what[i].operator String();
+	OS::get_singleton()->printerr("%s\n", str.utf8().get_data());
+}
+
+void godot_icall_Godot_printraw(MonoArray *p_what) {
+	Array what = GDMonoMarshal::mono_array_to_Array(p_what);
+	String str;
+	for (int i = 0; i < what.size(); i++)
+		str += what[i].operator String();
+	OS::get_singleton()->print("%s", str.utf8().get_data());
+}
+
+void godot_icall_Godot_prints(MonoArray *p_what) {
+	Array what = GDMonoMarshal::mono_array_to_Array(p_what);
+	String str;
+	for (int i = 0; i < what.size(); i++) {
+		if (i)
+			str += " ";
+		str += what[i].operator String();
+	}
+	print_line(str);
+}
+
+void godot_icall_Godot_printt(MonoArray *p_what) {
+	Array what = GDMonoMarshal::mono_array_to_Array(p_what);
+	String str;
+	for (int i = 0; i < what.size(); i++) {
+		if (i)
+			str += "\t";
+		str += what[i].operator String();
+	}
+	print_line(str);
+}
+
+void godot_icall_Godot_seed(int p_seed) {
+	Math::seed(p_seed);
+}
+
+MonoString *godot_icall_Godot_str(MonoArray *p_what) {
+	String str;
+	Array what = GDMonoMarshal::mono_array_to_Array(p_what);
+
+	for (int i = 0; i < what.size(); i++) {
+		String os = what[i].operator String();
+
+		if (i == 0)
+			str = os;
+		else
+			str += os;
+	}
+
+	return GDMonoMarshal::mono_string_from_godot(str);
+}
+
+MonoObject *godot_icall_Godot_str2var(MonoString *p_str) {
+	Variant ret;
+
+	VariantParser::StreamString ss;
+	ss.s = GDMonoMarshal::mono_string_to_godot(p_str);
+
+	String errs;
+	int line;
+	Error err = VariantParser::parse(&ss, ret, errs, line);
+	if (err != OK) {
+		String err_str = "Parse error at line " + itos(line) + ": " + errs;
+		ERR_PRINTS(err_str);
+		ret = err_str;
+	}
+
+	return GDMonoMarshal::variant_to_mono_object(ret);
+}
+
+bool godot_icall_Godot_type_exists(MonoString *p_type) {
+	return ClassDB::class_exists(GDMonoMarshal::mono_string_to_godot(p_type));
+}
+
+MonoArray *godot_icall_Godot_var2bytes(MonoObject *p_var) {
+	Variant var = GDMonoMarshal::mono_object_to_variant(p_var);
+
+	PoolByteArray barr;
+	int len;
+	Error err = encode_variant(var, NULL, len);
+	ERR_EXPLAIN("Unexpected error encoding variable to bytes, likely unserializable type found (Object or RID).");
+	ERR_FAIL_COND_V(err != OK, NULL);
+
+	barr.resize(len);
+	{
+		PoolByteArray::Write w = barr.write();
+		encode_variant(var, w.ptr(), len);
+	}
+
+	return GDMonoMarshal::PoolByteArray_to_mono_array(barr);
+}
+
+MonoString *godot_icall_Godot_var2str(MonoObject *p_var) {
+	String vars;
+	VariantWriter::write_to_string(GDMonoMarshal::mono_object_to_variant(p_var), vars);
+	return GDMonoMarshal::mono_string_from_godot(vars);
+}
+
+MonoObject *godot_icall_Godot_weakref(Object *p_obj) {
+	if (!p_obj)
+		return NULL;
+
+	Ref<WeakRef> wref;
+	Reference *ref = Object::cast_to<Reference>(p_obj);
+
+	if (ref) {
+		REF r = ref;
+		if (!r.is_valid())
+			return NULL;
+
+		wref.instance();
+		wref->set_ref(r);
+	} else {
+		wref.instance();
+		wref->set_obj(p_obj);
+	}
+
+	return GDMonoUtils::create_managed_for_godot_object(CACHED_CLASS(WeakRef), Reference::get_class_static(), Object::cast_to<Object>(wref.ptr()));
+}
diff --git a/modules/mono/godotsharp_defs.h b/modules/mono/godotsharp_defs.h
new file mode 100644
index 00000000000..f941a4d6c5c
--- /dev/null
+++ b/modules/mono/godotsharp_defs.h
@@ -0,0 +1,41 @@
+/*************************************************************************/
+/*  godotsharp_defs.h                                                    */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2017 Godot Engine contributors (cf. AUTHORS.md)    */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+#ifndef GODOTSHARP_DEFS_H
+#define GODOTSHARP_DEFS_H
+
+#define BINDINGS_NAMESPACE "Godot"
+#define BINDINGS_GLOBAL_SCOPE_CLASS "GD"
+#define BINDINGS_PTR_FIELD "ptr"
+#define BINDINGS_NATIVE_NAME_FIELD "nativeName"
+#define API_ASSEMBLY_NAME "GodotSharp"
+#define EDITOR_API_ASSEMBLY_NAME "GodotSharpEditor"
+#define EDITOR_TOOLS_ASSEMBLY_NAME "GodotSharpTools"
+
+#endif // GODOTSHARP_DEFS_H
diff --git a/modules/mono/godotsharp_dirs.cpp b/modules/mono/godotsharp_dirs.cpp
new file mode 100644
index 00000000000..0a2010e99dc
--- /dev/null
+++ b/modules/mono/godotsharp_dirs.cpp
@@ -0,0 +1,185 @@
+/*************************************************************************/
+/*  godotsharp_dirs.cpp                                                  */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2017 Godot Engine contributors (cf. AUTHORS.md)    */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+#include "godotsharp_dirs.h"
+
+#include "os/os.h"
+
+#ifdef TOOLS_ENABLED
+#include "editor/editor_settings.h"
+#include "project_settings.h"
+#include "version.h"
+#endif
+
+namespace GodotSharpDirs {
+
+String _get_expected_build_config() {
+#ifdef TOOLS_ENABLED
+	return "Tools";
+#else
+
+#ifdef DEBUG_ENABLED
+	return "Debug";
+#else
+	return "Release";
+#endif
+
+#endif
+}
+
+String _get_mono_user_dir() {
+#ifdef TOOLS_ENABLED
+	if (EditorSettings::get_singleton()) {
+		return EditorSettings::get_singleton()->get_settings_path().plus_file("mono");
+	} else {
+		String settings_path;
+
+		if (OS::get_singleton()->has_environment("APPDATA")) {
+			String app_data = OS::get_singleton()->get_environment("APPDATA").replace("\\", "/");
+			settings_path = app_data.plus_file(String(_MKSTR(VERSION_SHORT_NAME)).capitalize());
+		} else if (OS::get_singleton()->has_environment("HOME")) {
+			String home = OS::get_singleton()->get_environment("HOME");
+			settings_path = home.plus_file("." + String(_MKSTR(VERSION_SHORT_NAME)).to_lower());
+		}
+
+		return settings_path.plus_file("mono");
+	}
+#else
+	return OS::get_singleton()->get_data_dir().plus_file("mono");
+#endif
+}
+
+class _GodotSharpDirs {
+
+public:
+	String res_data_dir;
+	String res_metadata_dir;
+	String res_assemblies_dir;
+	String res_config_dir;
+	String res_temp_dir;
+	String res_temp_assemblies_base_dir;
+	String res_temp_assemblies_dir;
+	String mono_user_dir;
+	String mono_logs_dir;
+
+#ifdef TOOLS_ENABLED
+	String mono_solutions_dir;
+	String build_logs_dir;
+	String sln_filepath;
+	String csproj_filepath;
+#endif
+
+private:
+	_GodotSharpDirs() {
+		res_data_dir = "res://.mono";
+		res_metadata_dir = res_data_dir.plus_file("metadata");
+		res_assemblies_dir = res_data_dir.plus_file("assemblies");
+		res_config_dir = res_data_dir.plus_file("etc").plus_file("mono");
+
+		// TODO use paths from csproj
+		res_temp_dir = res_data_dir.plus_file("temp");
+		res_temp_assemblies_base_dir = res_temp_dir.plus_file("bin");
+		res_temp_assemblies_dir = res_temp_assemblies_base_dir.plus_file(_get_expected_build_config());
+
+		mono_user_dir = _get_mono_user_dir();
+		mono_logs_dir = mono_user_dir.plus_file("mono_logs");
+
+#ifdef TOOLS_ENABLED
+		mono_solutions_dir = mono_user_dir.plus_file("solutions");
+		build_logs_dir = mono_user_dir.plus_file("build_logs");
+		String base_path = String("res://") + ProjectSettings::get_singleton()->get("application/config/name");
+		sln_filepath = ProjectSettings::get_singleton()->globalize_path(base_path + ".sln");
+		csproj_filepath = ProjectSettings::get_singleton()->globalize_path(base_path + ".csproj");
+#endif
+	}
+
+	_GodotSharpDirs(const _GodotSharpDirs &);
+	_GodotSharpDirs &operator=(const _GodotSharpDirs &);
+
+public:
+	static _GodotSharpDirs &get_singleton() {
+		static _GodotSharpDirs singleton;
+		return singleton;
+	}
+};
+
+String get_res_data_dir() {
+	return _GodotSharpDirs::get_singleton().res_data_dir;
+}
+
+String get_res_metadata_dir() {
+	return _GodotSharpDirs::get_singleton().res_metadata_dir;
+}
+
+String get_res_assemblies_dir() {
+	return _GodotSharpDirs::get_singleton().res_assemblies_dir;
+}
+
+String get_res_config_dir() {
+	return _GodotSharpDirs::get_singleton().res_config_dir;
+}
+
+String get_res_temp_dir() {
+	return _GodotSharpDirs::get_singleton().res_temp_dir;
+}
+
+String get_res_temp_assemblies_base_dir() {
+	return _GodotSharpDirs::get_singleton().res_temp_assemblies_base_dir;
+}
+
+String get_res_temp_assemblies_dir() {
+	return _GodotSharpDirs::get_singleton().res_temp_assemblies_dir;
+}
+
+String get_mono_user_dir() {
+	return _GodotSharpDirs::get_singleton().mono_user_dir;
+}
+
+String get_mono_logs_dir() {
+	return _GodotSharpDirs::get_singleton().mono_logs_dir;
+}
+
+#ifdef TOOLS_ENABLED
+String get_mono_solutions_dir() {
+	return _GodotSharpDirs::get_singleton().mono_solutions_dir;
+}
+
+String get_build_logs_dir() {
+	return _GodotSharpDirs::get_singleton().build_logs_dir;
+}
+
+String get_project_sln_path() {
+	return _GodotSharpDirs::get_singleton().sln_filepath;
+}
+
+String get_project_csproj_path() {
+	return _GodotSharpDirs::get_singleton().csproj_filepath;
+}
+#endif
+}
diff --git a/modules/mono/godotsharp_dirs.h b/modules/mono/godotsharp_dirs.h
new file mode 100644
index 00000000000..ba2c0652107
--- /dev/null
+++ b/modules/mono/godotsharp_dirs.h
@@ -0,0 +1,58 @@
+/*************************************************************************/
+/*  godotsharp_dirs.h                                                    */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2017 Godot Engine contributors (cf. AUTHORS.md)    */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+#ifndef GODOTSHARP_DIRS_H
+#define GODOTSHARP_DIRS_H
+
+#include "ustring.h"
+
+namespace GodotSharpDirs {
+
+String get_res_data_dir();
+String get_res_metadata_dir();
+String get_res_assemblies_dir();
+String get_res_config_dir();
+String get_res_temp_dir();
+String get_res_temp_assemblies_base_dir();
+String get_res_temp_assemblies_dir();
+
+String get_mono_user_dir();
+String get_mono_logs_dir();
+
+#ifdef TOOLS_ENABLED
+String get_mono_solutions_dir();
+String get_build_logs_dir();
+String get_custom_project_settings_dir();
+#endif
+
+String get_project_sln_path();
+String get_project_csproj_path();
+}
+
+#endif // GODOTSHARP_DIRS_H
diff --git a/modules/mono/mono_gc_handle.cpp b/modules/mono/mono_gc_handle.cpp
new file mode 100644
index 00000000000..d3ad9681356
--- /dev/null
+++ b/modules/mono/mono_gc_handle.cpp
@@ -0,0 +1,77 @@
+/*************************************************************************/
+/*  mono_gc_handle.cpp                                                   */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2017 Godot Engine contributors (cf. AUTHORS.md)    */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+#include "mono_gc_handle.h"
+
+#include "mono_gd/gd_mono.h"
+
+uint32_t MonoGCHandle::make_strong_handle(MonoObject *p_object) {
+
+	return mono_gchandle_new(
+			p_object,
+			false /* do not pin the object */
+			);
+}
+
+uint32_t MonoGCHandle::make_weak_handle(MonoObject *p_object) {
+
+	return mono_gchandle_new_weakref(
+			p_object,
+			true /* track_resurrection: allows us to invoke _notification(NOTIFICATION_PREDELETE) while disposing */
+			);
+}
+
+Ref<MonoGCHandle> MonoGCHandle::create_strong(MonoObject *p_object) {
+
+	return memnew(MonoGCHandle(make_strong_handle(p_object)));
+}
+
+Ref<MonoGCHandle> MonoGCHandle::create_weak(MonoObject *p_object) {
+
+	return memnew(MonoGCHandle(make_weak_handle(p_object)));
+}
+
+void MonoGCHandle::release() {
+
+	if (!released && GDMono::get_singleton()->is_runtime_initialized()) {
+		mono_gchandle_free(handle);
+		released = true;
+	}
+}
+
+MonoGCHandle::MonoGCHandle(uint32_t p_handle) {
+
+	released = false;
+	handle = p_handle;
+}
+
+MonoGCHandle::~MonoGCHandle() {
+
+	release();
+}
diff --git a/modules/mono/mono_gc_handle.h b/modules/mono/mono_gc_handle.h
new file mode 100644
index 00000000000..cf5b6cec21a
--- /dev/null
+++ b/modules/mono/mono_gc_handle.h
@@ -0,0 +1,63 @@
+/*************************************************************************/
+/*  mono_gc_handle.h                                                     */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2017 Godot Engine contributors (cf. AUTHORS.md)    */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+#ifndef CSHARP_GC_HANDLE_H
+#define CSHARP_GC_HANDLE_H
+
+#include <mono/jit/jit.h>
+
+#include "reference.h"
+
+class MonoGCHandle : public Reference {
+
+	GDCLASS(MonoGCHandle, Reference)
+
+	bool released;
+	uint32_t handle;
+
+public:
+	static uint32_t make_strong_handle(MonoObject *p_object);
+	static uint32_t make_weak_handle(MonoObject *p_object);
+
+	static Ref<MonoGCHandle> create_strong(MonoObject *p_object);
+	static Ref<MonoGCHandle> create_weak(MonoObject *p_object);
+
+	_FORCE_INLINE_ MonoObject *get_target() const { return released ? NULL : mono_gchandle_get_target(handle); }
+
+	_FORCE_INLINE_ void set_handle(uint32_t p_handle) {
+		handle = p_handle;
+		released = false;
+	}
+	void release();
+
+	MonoGCHandle(uint32_t p_handle);
+	~MonoGCHandle();
+};
+
+#endif // CSHARP_GC_HANDLE_H
diff --git a/modules/mono/mono_gd/gd_mono.cpp b/modules/mono/mono_gd/gd_mono.cpp
new file mode 100644
index 00000000000..77f01842bbb
--- /dev/null
+++ b/modules/mono/mono_gd/gd_mono.cpp
@@ -0,0 +1,771 @@
+/*************************************************************************/
+/*  gd_mono.cpp                                                          */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2017 Godot Engine contributors (cf. AUTHORS.md)    */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+#include "gd_mono.h"
+
+#include <mono/metadata/mono-config.h>
+#include <mono/metadata/mono-debug.h>
+
+#include "os/dir_access.h"
+#include "os/file_access.h"
+#include "os/os.h"
+#include "os/thread.h"
+#include "project_settings.h"
+
+#include "../csharp_script.h"
+#include "../utils/path_utils.h"
+#include "gd_mono_utils.h"
+
+#ifdef TOOLS_ENABLED
+#include "../editor/godotsharp_editor.h"
+#endif
+
+#ifdef MONO_PRINT_HANDLER_ENABLED
+void gdmono_MonoPrintCallback(const char *string, mono_bool is_stdout) {
+
+	if (is_stdout) {
+		OS::get_singleton()->print(string);
+	} else {
+		OS::get_singleton()->printerr(string);
+	}
+}
+#endif
+
+GDMono *GDMono::singleton = NULL;
+
+#ifdef DEBUG_ENABLED
+static bool _wait_for_debugger_msecs(uint32_t p_msecs) {
+
+	do {
+		if (mono_is_debugger_attached())
+			return true;
+
+		int last_tick = OS::get_singleton()->get_ticks_msec();
+
+		OS::get_singleton()->delay_usec((p_msecs < 25 ? p_msecs : 25) * 1000);
+
+		int tdiff = OS::get_singleton()->get_ticks_msec() - last_tick;
+
+		if (tdiff > p_msecs) {
+			p_msecs = 0;
+		} else {
+			p_msecs -= tdiff;
+		}
+	} while (p_msecs > 0);
+
+	return mono_is_debugger_attached();
+}
+#endif
+
+#ifdef TOOLS_ENABLED
+// temporary workaround. should be provided from Main::setup/setup2 instead
+bool _is_project_manager_requested() {
+
+	List<String> cmdline_args = OS::get_singleton()->get_cmdline_args();
+	for (List<String>::Element *E = cmdline_args.front(); E; E = E->next()) {
+		const String &arg = E->get();
+		if (arg == "-p" || arg == "--project-manager")
+			return true;
+	}
+
+	return false;
+}
+#endif
+
+#ifdef DEBUG_ENABLED
+void gdmono_debug_init() {
+
+	mono_debug_init(MONO_DEBUG_FORMAT_MONO);
+
+	int da_port = GLOBAL_DEF("mono/debugger_agent/port", 23685);
+	bool da_suspend = GLOBAL_DEF("mono/debugger_agent/wait_for_debugger", false);
+	int da_timeout = GLOBAL_DEF("mono/debugger_agent/wait_timeout", 3000);
+
+#ifdef TOOLS_ENABLED
+	if (Engine::get_singleton()->is_editor_hint() ||
+			ProjectSettings::get_singleton()->get_resource_path().empty() ||
+			_is_project_manager_requested()) {
+		return;
+	}
+#endif
+
+	CharString da_args = String("--debugger-agent=transport=dt_socket,address=127.0.0.1:" + itos(da_port) +
+								",embedding=1,server=y,suspend=" + (da_suspend ? "y,timeout=" + itos(da_timeout) : "n"))
+								 .utf8();
+	// --debugger-agent=help
+	const char *options[] = {
+		"--soft-breakpoints",
+		da_args.get_data()
+	};
+	mono_jit_parse_options(2, (char **)options);
+}
+#endif
+
+void GDMono::initialize() {
+
+	ERR_FAIL_NULL(Engine::get_singleton());
+
+	OS::get_singleton()->print("Initializing mono...\n");
+
+#ifdef DEBUG_METHODS_ENABLED
+	_initialize_and_check_api_hashes();
+#endif
+
+	GDMonoLog::get_singleton()->initialize();
+
+#ifdef MONO_PRINT_HANDLER_ENABLED
+	mono_trace_set_print_handler(gdmono_MonoPrintCallback);
+	mono_trace_set_printerr_handler(gdmono_MonoPrintCallback);
+#endif
+
+#ifdef WINDOWS_ENABLED
+	mono_reg_info = MonoRegUtils::find_mono();
+
+	CharString assembly_dir;
+	CharString config_dir;
+
+	if (mono_reg_info.assembly_dir.length() && DirAccess::exists(mono_reg_info.assembly_dir)) {
+		assembly_dir = mono_reg_info.assembly_dir.utf8();
+	}
+
+	if (mono_reg_info.config_dir.length() && DirAccess::exists(mono_reg_info.config_dir)) {
+		config_dir = mono_reg_info.config_dir.utf8();
+	}
+
+	mono_set_dirs(assembly_dir.length() ? assembly_dir.get_data() : NULL,
+			config_dir.length() ? config_dir.get_data() : NULL);
+#else
+	mono_set_dirs(NULL, NULL);
+#endif
+
+	GDMonoAssembly::initialize();
+
+#ifdef DEBUG_ENABLED
+	gdmono_debug_init();
+#endif
+
+	mono_config_parse(NULL);
+
+	root_domain = mono_jit_init_version("GodotEngine.RootDomain", "v4.0.30319");
+
+	ERR_EXPLAIN("Mono: Failed to initialize runtime");
+	ERR_FAIL_NULL(root_domain);
+
+	GDMonoUtils::set_main_thread(GDMonoUtils::get_current_thread());
+
+	runtime_initialized = true;
+
+	OS::get_singleton()->print("Mono: Runtime initialized\n");
+
+	// mscorlib assembly MUST be present at initialization
+	ERR_EXPLAIN("Mono: Failed to load mscorlib assembly");
+	ERR_FAIL_COND(!_load_corlib_assembly());
+
+#ifdef TOOLS_ENABLED
+	// The tools domain must be loaded here, before the scripts domain.
+	// Otherwise domain unload on the scripts domain will hang indefinitely.
+
+	ERR_EXPLAIN("Mono: Failed to load tools domain");
+	ERR_FAIL_COND(_load_tools_domain() != OK);
+
+	// TODO move to editor init callback, and do it lazily when required before editor init (e.g.: bindings generation)
+	ERR_EXPLAIN("Mono: Failed to load Editor Tools assembly");
+	ERR_FAIL_COND(!_load_editor_tools_assembly());
+#endif
+
+	ERR_EXPLAIN("Mono: Failed to load scripts domain");
+	ERR_FAIL_COND(_load_scripts_domain() != OK);
+
+#ifdef DEBUG_ENABLED
+	bool debugger_attached = _wait_for_debugger_msecs(500);
+	if (!debugger_attached && OS::get_singleton()->is_stdout_verbose())
+		OS::get_singleton()->printerr("Mono: Debugger wait timeout\n");
+#endif
+
+	_register_internal_calls();
+
+	// The following assemblies are not required at initialization
+	_load_all_script_assemblies();
+
+	OS::get_singleton()->print("Mono: EVERYTHING OK\n");
+}
+
+#ifndef MONO_GLUE_DISABLED
+namespace GodotSharpBindings {
+
+uint64_t get_core_api_hash();
+uint64_t get_editor_api_hash();
+
+void register_generated_icalls();
+} // namespace GodotSharpBindings
+#endif
+
+void GDMono::_register_internal_calls() {
+#ifndef MONO_GLUE_DISABLED
+	GodotSharpBindings::register_generated_icalls();
+#endif
+
+#ifdef TOOLS_ENABLED
+	GodotSharpBuilds::_register_internal_calls();
+#endif
+}
+
+#ifdef DEBUG_METHODS_ENABLED
+void GDMono::_initialize_and_check_api_hashes() {
+
+	api_core_hash = ClassDB::get_api_hash(ClassDB::API_CORE);
+
+#ifndef MONO_GLUE_DISABLED
+	if (api_core_hash != GodotSharpBindings::get_core_api_hash()) {
+		ERR_PRINT("Mono: Core API hash mismatch!");
+	}
+#endif
+
+#ifdef TOOLS_ENABLED
+	api_editor_hash = ClassDB::get_api_hash(ClassDB::API_EDITOR);
+
+#ifndef MONO_GLUE_DISABLED
+	if (api_editor_hash != GodotSharpBindings::get_editor_api_hash()) {
+		ERR_PRINT("Mono: Editor API hash mismatch!");
+	}
+#endif
+
+#endif // TOOLS_ENABLED
+}
+#endif // DEBUG_METHODS_ENABLED
+
+void GDMono::add_assembly(uint32_t p_domain_id, GDMonoAssembly *p_assembly) {
+
+	assemblies[p_domain_id][p_assembly->get_name()] = p_assembly;
+}
+
+bool GDMono::_load_assembly(const String &p_name, GDMonoAssembly **r_assembly) {
+
+	CRASH_COND(!r_assembly);
+
+	if (OS::get_singleton()->is_stdout_verbose())
+		OS::get_singleton()->print((String() + "Mono: Loading assembly " + p_name + "...\n").utf8());
+
+	MonoImageOpenStatus status;
+	MonoAssemblyName *aname = mono_assembly_name_new(p_name.utf8());
+	MonoAssembly *assembly = mono_assembly_load_full(aname, NULL, &status, false);
+	mono_assembly_name_free(aname);
+
+	if (!assembly)
+		return false;
+
+	uint32_t domain_id = mono_domain_get_id(mono_domain_get());
+
+	GDMonoAssembly **stored_assembly = assemblies[domain_id].getptr(p_name);
+
+	if (stored_assembly) {
+		// Loaded by our preload hook (status is not initialized when returning from a preload hook)
+		ERR_FAIL_COND_V((*stored_assembly)->get_assembly() != assembly, false);
+		*r_assembly = *stored_assembly;
+	} else {
+		ERR_FAIL_COND_V(status != MONO_IMAGE_OK, false);
+
+		MonoImage *assembly_image = mono_assembly_get_image(assembly);
+		ERR_FAIL_NULL_V(assembly_image, false);
+
+		const char *path = mono_image_get_filename(assembly_image);
+
+		*r_assembly = memnew(GDMonoAssembly(p_name, path));
+		Error error = (*r_assembly)->wrapper_for_image(assembly_image);
+
+		if (error != OK) {
+			memdelete(*r_assembly);
+			*r_assembly = NULL;
+			ERR_FAIL_V(false);
+		}
+	}
+
+	if (OS::get_singleton()->is_stdout_verbose())
+		OS::get_singleton()->print(String("Mono: Assembly " + p_name + " loaded from path: " + (*r_assembly)->get_path() + "\n").utf8());
+
+	return true;
+}
+
+bool GDMono::_load_corlib_assembly() {
+
+	if (corlib_assembly)
+		return true;
+
+	bool success = _load_assembly("mscorlib", &corlib_assembly);
+
+	if (success)
+		GDMonoUtils::update_corlib_cache();
+
+	return success;
+}
+
+bool GDMono::_load_core_api_assembly() {
+
+	if (api_assembly)
+		return true;
+
+	bool success = _load_assembly(API_ASSEMBLY_NAME, &api_assembly);
+
+	if (success)
+		GDMonoUtils::update_godot_api_cache();
+
+	return success;
+}
+
+#ifdef TOOLS_ENABLED
+bool GDMono::_load_editor_api_assembly() {
+
+	if (editor_api_assembly)
+		return true;
+
+	return _load_assembly(EDITOR_API_ASSEMBLY_NAME, &editor_api_assembly);
+}
+#endif
+
+#ifdef TOOLS_ENABLED
+bool GDMono::_load_editor_tools_assembly() {
+
+	if (editor_tools_assembly)
+		return true;
+
+	_GDMONO_SCOPE_DOMAIN_(tools_domain)
+
+	return _load_assembly(EDITOR_TOOLS_ASSEMBLY_NAME, &editor_tools_assembly);
+}
+#endif
+
+bool GDMono::_load_project_assembly() {
+
+	if (project_assembly)
+		return true;
+
+	String project_assembly_name = ProjectSettings::get_singleton()->get("application/config/name");
+
+	bool success = _load_assembly(project_assembly_name, &project_assembly);
+
+	if (success)
+		mono_assembly_set_main(project_assembly->get_assembly());
+
+	return success;
+}
+
+bool GDMono::_load_all_script_assemblies() {
+
+#ifndef MONO_GLUE_DISABLED
+	if (!_load_core_api_assembly()) {
+		if (OS::get_singleton()->is_stdout_verbose())
+			OS::get_singleton()->printerr("Mono: Failed to load Core API assembly\n");
+		return false;
+	} else {
+#ifdef TOOLS_ENABLED
+		if (!_load_editor_api_assembly()) {
+			if (OS::get_singleton()->is_stdout_verbose())
+				OS::get_singleton()->printerr("Mono: Failed to load Editor API assembly\n");
+			return false;
+		}
+#endif
+	}
+
+	if (!_load_project_assembly()) {
+		if (OS::get_singleton()->is_stdout_verbose())
+			OS::get_singleton()->printerr("Mono: Failed to load project assembly\n");
+		return false;
+	}
+
+	return true;
+#else
+	if (OS::get_singleton()->is_stdout_verbose())
+		OS::get_singleton()->print("Mono: Glue disbled, ignoring script assemblies\n");
+
+	return true;
+#endif
+}
+
+Error GDMono::_load_scripts_domain() {
+
+	ERR_FAIL_COND_V(scripts_domain != NULL, ERR_BUG);
+
+	if (OS::get_singleton()->is_stdout_verbose()) {
+		OS::get_singleton()->print("Mono: Loading scripts domain...\n");
+	}
+
+	scripts_domain = GDMonoUtils::create_domain("GodotEngine.ScriptsDomain");
+
+	ERR_EXPLAIN("Mono: Could not create scripts app domain");
+	ERR_FAIL_NULL_V(scripts_domain, ERR_CANT_CREATE);
+
+	mono_domain_set(scripts_domain, true);
+
+	return OK;
+}
+
+Error GDMono::_unload_scripts_domain() {
+
+	ERR_FAIL_NULL_V(scripts_domain, ERR_BUG);
+
+	if (OS::get_singleton()->is_stdout_verbose()) {
+		OS::get_singleton()->print("Mono: Unloading scripts domain...\n");
+	}
+
+	_GodotSharp::get_singleton()->_dispose_callback();
+
+	if (mono_domain_get() != root_domain)
+		mono_domain_set(root_domain, true);
+
+	finalizing_scripts_domain = true;
+	mono_domain_finalize(scripts_domain, 2000);
+	finalizing_scripts_domain = false;
+
+	_domain_assemblies_cleanup(mono_domain_get_id(scripts_domain));
+
+	api_assembly = NULL;
+	project_assembly = NULL;
+#ifdef TOOLS_ENABLED
+	editor_api_assembly = NULL;
+#endif
+
+	MonoDomain *domain = scripts_domain;
+	scripts_domain = NULL;
+
+	_GodotSharp::get_singleton()->_dispose_callback();
+
+	MonoObject *ex = NULL;
+	mono_domain_try_unload(domain, &ex);
+
+	if (ex) {
+		ERR_PRINT("Exception thrown when unloading scripts domain:");
+		mono_print_unhandled_exception(ex);
+		return FAILED;
+	}
+
+	return OK;
+}
+
+#ifdef TOOLS_ENABLED
+Error GDMono::_load_tools_domain() {
+
+	ERR_FAIL_COND_V(tools_domain != NULL, ERR_BUG);
+
+	if (OS::get_singleton()->is_stdout_verbose()) {
+		OS::get_singleton()->print("Mono: Loading tools domain...\n");
+	}
+
+	tools_domain = GDMonoUtils::create_domain("GodotEngine.ToolsDomain");
+
+	ERR_EXPLAIN("Mono: Could not create tools app domain");
+	ERR_FAIL_NULL_V(tools_domain, ERR_CANT_CREATE);
+
+	return OK;
+}
+#endif
+
+#ifdef TOOLS_ENABLED
+Error GDMono::reload_scripts_domain() {
+
+	ERR_FAIL_COND_V(!runtime_initialized, ERR_BUG);
+
+	if (scripts_domain) {
+		Error err = _unload_scripts_domain();
+		if (err != OK) {
+			ERR_PRINT("Mono: Failed to unload scripts domain");
+			return err;
+		}
+	}
+
+	Error err = _load_scripts_domain();
+	if (err != OK) {
+		ERR_PRINT("Mono: Failed to load scripts domain");
+		return err;
+	}
+
+	if (!_load_all_script_assemblies()) {
+		if (OS::get_singleton()->is_stdout_verbose())
+			OS::get_singleton()->printerr("Mono: Failed to load script assemblies\n");
+		return ERR_CANT_OPEN;
+	}
+
+	return OK;
+}
+#endif
+
+GDMonoClass *GDMono::get_class(MonoClass *p_raw_class) {
+
+	MonoImage *image = mono_class_get_image(p_raw_class);
+
+	if (image == corlib_assembly->get_image())
+		return corlib_assembly->get_class(p_raw_class);
+
+	uint32_t domain_id = mono_domain_get_id(mono_domain_get());
+	HashMap<String, GDMonoAssembly *> &domain_assemblies = assemblies[domain_id];
+
+	const String *k = NULL;
+	while ((k = domain_assemblies.next(k))) {
+		GDMonoAssembly *assembly = domain_assemblies.get(*k);
+		if (assembly->get_image() == image) {
+			GDMonoClass *klass = assembly->get_class(p_raw_class);
+
+			if (klass)
+				return klass;
+		}
+	}
+
+	return NULL;
+}
+
+void GDMono::_domain_assemblies_cleanup(uint32_t p_domain_id) {
+
+	HashMap<String, GDMonoAssembly *> &domain_assemblies = assemblies[p_domain_id];
+
+	const String *k = NULL;
+	while ((k = domain_assemblies.next(k))) {
+		memdelete(domain_assemblies.get(*k));
+	}
+
+	assemblies.erase(p_domain_id);
+}
+
+GDMono::GDMono() {
+
+	singleton = this;
+
+	gdmono_log = memnew(GDMonoLog);
+
+	runtime_initialized = false;
+	finalizing_scripts_domain = false;
+
+	root_domain = NULL;
+	scripts_domain = NULL;
+#ifdef TOOLS_ENABLED
+	tools_domain = NULL;
+#endif
+
+	corlib_assembly = NULL;
+	api_assembly = NULL;
+	project_assembly = NULL;
+#ifdef TOOLS_ENABLED
+	editor_api_assembly = NULL;
+	editor_tools_assembly = NULL;
+#endif
+
+#ifdef DEBUG_METHODS_ENABLED
+	api_core_hash = 0;
+#ifdef TOOLS_ENABLED
+	api_editor_hash = 0;
+#endif
+#endif
+}
+
+GDMono::~GDMono() {
+
+	if (runtime_initialized) {
+
+		if (scripts_domain) {
+
+			Error err = _unload_scripts_domain();
+			if (err != OK) {
+				WARN_PRINT("Mono: Failed to unload scripts domain");
+			}
+		}
+
+		const uint32_t *k = NULL;
+		while ((k = assemblies.next(k))) {
+			HashMap<String, GDMonoAssembly *> &domain_assemblies = assemblies.get(*k);
+
+			const String *kk = NULL;
+			while ((kk = domain_assemblies.next(kk))) {
+				memdelete(domain_assemblies.get(*kk));
+			}
+		}
+		assemblies.clear();
+
+		GDMonoUtils::clear_cache();
+
+		OS::get_singleton()->print("Mono: Runtime cleanup...\n");
+
+		runtime_initialized = false;
+		mono_jit_cleanup(root_domain);
+	}
+
+	if (gdmono_log)
+		memdelete(gdmono_log);
+}
+
+_GodotSharp *_GodotSharp::singleton = NULL;
+
+void _GodotSharp::_dispose_object(Object *p_object) {
+
+	if (p_object->get_script_instance()) {
+		CSharpInstance *cs_instance = CAST_CSHARP_INSTANCE(p_object->get_script_instance());
+		if (cs_instance) {
+			cs_instance->mono_object_disposed();
+			return;
+		}
+	}
+
+	// Unsafe refcount decrement. The managed instance also counts as a reference.
+	// See: CSharpLanguage::alloc_instance_binding_data(Object *p_object)
+	if (Object::cast_to<Reference>(p_object)->unreference()) {
+		memdelete(p_object);
+	}
+}
+
+void _GodotSharp::_dispose_callback() {
+
+#ifndef NO_THREADS
+	queue_mutex->lock();
+#endif
+
+	for (List<Object *>::Element *E = obj_delete_queue.front(); E; E = E->next()) {
+		_dispose_object(E->get());
+	}
+
+	for (List<NodePath *>::Element *E = np_delete_queue.front(); E; E = E->next()) {
+		memdelete(E->get());
+	}
+
+	for (List<RID *>::Element *E = rid_delete_queue.front(); E; E = E->next()) {
+		memdelete(E->get());
+	}
+
+	obj_delete_queue.clear();
+	np_delete_queue.clear();
+	rid_delete_queue.clear();
+	queue_empty = true;
+
+#ifndef NO_THREADS
+	queue_mutex->unlock();
+#endif
+}
+
+void _GodotSharp::attach_thread() {
+
+	GDMonoUtils::attach_current_thread();
+}
+
+void _GodotSharp::detach_thread() {
+
+	GDMonoUtils::detach_current_thread();
+}
+
+bool _GodotSharp::is_finalizing_domain() {
+
+	return GDMono::get_singleton()->is_finalizing_scripts_domain();
+}
+
+bool _GodotSharp::is_domain_loaded() {
+
+	return GDMono::get_singleton()->get_scripts_domain() != NULL;
+}
+
+#define ENQUEUE_FOR_DISPOSAL(m_queue, m_inst) \
+	m_queue.push_back(m_inst);                \
+	if (queue_empty) {                        \
+		queue_empty = false;                  \
+		call_deferred("_dispose_callback");   \
+	}
+
+void _GodotSharp::queue_dispose(Object *p_object) {
+
+	if (Thread::get_main_id() == Thread::get_caller_id() && !GDMono::get_singleton()->is_finalizing_scripts_domain()) {
+		_dispose_object(p_object);
+	} else {
+#ifndef NO_THREADS
+		queue_mutex->lock();
+#endif
+
+		ENQUEUE_FOR_DISPOSAL(obj_delete_queue, p_object);
+
+#ifndef NO_THREADS
+		queue_mutex->unlock();
+#endif
+	}
+}
+
+void _GodotSharp::queue_dispose(NodePath *p_node_path) {
+
+	if (Thread::get_main_id() == Thread::get_caller_id() && !GDMono::get_singleton()->is_finalizing_scripts_domain()) {
+		memdelete(p_node_path);
+	} else {
+#ifndef NO_THREADS
+		queue_mutex->lock();
+#endif
+
+		ENQUEUE_FOR_DISPOSAL(np_delete_queue, p_node_path);
+
+#ifndef NO_THREADS
+		queue_mutex->unlock();
+#endif
+	}
+}
+
+void _GodotSharp::queue_dispose(RID *p_rid) {
+
+	if (Thread::get_main_id() == Thread::get_caller_id() && !GDMono::get_singleton()->is_finalizing_scripts_domain()) {
+		memdelete(p_rid);
+	} else {
+#ifndef NO_THREADS
+		queue_mutex->lock();
+#endif
+
+		ENQUEUE_FOR_DISPOSAL(rid_delete_queue, p_rid);
+
+#ifndef NO_THREADS
+		queue_mutex->unlock();
+#endif
+	}
+}
+
+void _GodotSharp::_bind_methods() {
+
+	ClassDB::bind_method(D_METHOD("attach_thread"), &_GodotSharp::attach_thread);
+	ClassDB::bind_method(D_METHOD("detach_thread"), &_GodotSharp::detach_thread);
+
+	ClassDB::bind_method(D_METHOD("is_finalizing_domain"), &_GodotSharp::is_finalizing_domain);
+	ClassDB::bind_method(D_METHOD("is_domain_loaded"), &_GodotSharp::is_domain_loaded);
+
+	ClassDB::bind_method(D_METHOD("_dispose_callback"), &_GodotSharp::_dispose_callback);
+}
+
+_GodotSharp::_GodotSharp() {
+
+	singleton = this;
+	queue_empty = true;
+#ifndef NO_THREADS
+	queue_mutex = Mutex::create();
+#endif
+}
+
+_GodotSharp::~_GodotSharp() {
+
+	singleton = NULL;
+
+	if (queue_mutex) {
+		memdelete(queue_mutex);
+	}
+}
diff --git a/modules/mono/mono_gd/gd_mono.h b/modules/mono/mono_gd/gd_mono.h
new file mode 100644
index 00000000000..ab96d575e68
--- /dev/null
+++ b/modules/mono/mono_gd/gd_mono.h
@@ -0,0 +1,224 @@
+/*************************************************************************/
+/*  gd_mono.h                                                            */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2017 Godot Engine contributors (cf. AUTHORS.md)    */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+#ifndef GD_MONO_H
+#define GD_MONO_H
+
+#include "../godotsharp_defs.h"
+#include "gd_mono_assembly.h"
+#include "gd_mono_log.h"
+
+#ifdef WINDOWS_ENABLED
+#include "../utils/mono_reg_utils.h"
+#endif
+
+#define SCRIPTS_DOMAIN GDMono::get_singleton()->get_scripts_domain()
+#ifdef TOOLS_ENABLED
+#define TOOLS_DOMAIN GDMono::get_singleton()->get_tools_domain()
+#endif
+
+class GDMono {
+
+	bool runtime_initialized;
+	bool finalizing_scripts_domain;
+
+	MonoDomain *root_domain;
+	MonoDomain *scripts_domain;
+#ifdef TOOLS_ENABLED
+	MonoDomain *tools_domain;
+#endif
+
+	GDMonoAssembly *corlib_assembly;
+	GDMonoAssembly *api_assembly;
+	GDMonoAssembly *project_assembly;
+#ifdef TOOLS_ENABLED
+	GDMonoAssembly *editor_api_assembly;
+	GDMonoAssembly *editor_tools_assembly;
+#endif
+
+	HashMap<uint32_t, HashMap<String, GDMonoAssembly *> > assemblies;
+
+	void _domain_assemblies_cleanup(uint32_t p_domain_id);
+
+	bool _load_corlib_assembly();
+	bool _load_core_api_assembly();
+#ifdef TOOLS_ENABLED
+	bool _load_editor_api_assembly();
+	bool _load_editor_tools_assembly();
+#endif
+	bool _load_project_assembly();
+
+	bool _load_all_script_assemblies();
+
+	void _register_internal_calls();
+
+	Error _load_scripts_domain();
+	Error _unload_scripts_domain();
+
+#ifdef TOOLS_ENABLED
+	Error _load_tools_domain();
+#endif
+
+#ifdef DEBUG_METHODS_ENABLED
+	uint64_t api_core_hash;
+#ifdef TOOLS_ENABLED
+	uint64_t api_editor_hash;
+#endif
+	void _initialize_and_check_api_hashes();
+#endif
+
+	bool _load_assembly(const String &p_name, GDMonoAssembly **r_assembly);
+
+	GDMonoLog *gdmono_log;
+
+#ifdef WINDOWS_ENABLED
+	MonoRegInfo mono_reg_info;
+#endif
+
+protected:
+	static GDMono *singleton;
+
+public:
+#ifdef DEBUG_METHODS_ENABLED
+	uint64_t get_api_core_hash() { return api_core_hash; }
+#ifdef TOOLS_ENABLED
+	uint64_t get_api_editor_hash() { return api_editor_hash; }
+#endif
+#endif
+
+	enum MemberVisibility {
+		PRIVATE,
+		PROTECTED_AND_INTERNAL, // FAM_AND_ASSEM
+		INTERNAL, // ASSEMBLY
+		PROTECTED, // FAMILY
+		PUBLIC
+	};
+
+	static GDMono *get_singleton() { return singleton; }
+
+	void add_assembly(uint32_t p_domain_id, GDMonoAssembly *p_assembly);
+
+	_FORCE_INLINE_ bool is_runtime_initialized() const { return runtime_initialized; }
+	_FORCE_INLINE_ bool is_finalizing_scripts_domain() const { return finalizing_scripts_domain; }
+
+	_FORCE_INLINE_ MonoDomain *get_scripts_domain() { return scripts_domain; }
+#ifdef TOOLS_ENABLED
+	_FORCE_INLINE_ MonoDomain *get_tools_domain() { return tools_domain; }
+#endif
+
+	_FORCE_INLINE_ GDMonoAssembly *get_corlib_assembly() const { return corlib_assembly; }
+	_FORCE_INLINE_ GDMonoAssembly *get_api_assembly() const { return api_assembly; }
+	_FORCE_INLINE_ GDMonoAssembly *get_project_assembly() const { return project_assembly; }
+#ifdef TOOLS_ENABLED
+	_FORCE_INLINE_ GDMonoAssembly *get_editor_api_assembly() const { return editor_api_assembly; }
+	_FORCE_INLINE_ GDMonoAssembly *get_editor_tools_assembly() const { return editor_tools_assembly; }
+#endif
+
+#ifdef WINDOWS_ENABLED
+	const MonoRegInfo &get_mono_reg_info() { return mono_reg_info; }
+#endif
+
+	GDMonoClass *get_class(MonoClass *p_raw_class);
+
+#ifdef TOOLS_ENABLED
+	Error reload_scripts_domain();
+#endif
+
+	void initialize();
+
+	GDMono();
+	~GDMono();
+};
+
+class GDMonoScopeDomain {
+
+	MonoDomain *prev_domain;
+
+public:
+	GDMonoScopeDomain(MonoDomain *p_domain) {
+		MonoDomain *prev_domain = mono_domain_get();
+		if (prev_domain != p_domain) {
+			this->prev_domain = prev_domain;
+			mono_domain_set(p_domain, false);
+		} else {
+			this->prev_domain = NULL;
+		}
+	}
+
+	~GDMonoScopeDomain() {
+		if (prev_domain)
+			mono_domain_set(prev_domain, false);
+	}
+};
+
+#define _GDMONO_SCOPE_DOMAIN_(m_mono_domain)                    \
+	GDMonoScopeDomain __gdmono__scope__domain__(m_mono_domain); \
+	(void)__gdmono__scope__domain__;
+
+class _GodotSharp : public Object {
+	GDCLASS(_GodotSharp, Object)
+
+	friend class GDMono;
+
+	void _dispose_object(Object *p_object);
+
+	void _dispose_callback();
+
+	List<Object *> obj_delete_queue;
+	List<NodePath *> np_delete_queue;
+	List<RID *> rid_delete_queue;
+
+	bool queue_empty;
+
+#ifndef NO_THREADS
+	Mutex *queue_mutex;
+#endif
+
+protected:
+	static _GodotSharp *singleton;
+	static void _bind_methods();
+
+public:
+	static _GodotSharp *get_singleton() { return singleton; }
+
+	void attach_thread();
+	void detach_thread();
+
+	bool is_finalizing_domain();
+	bool is_domain_loaded();
+
+	void queue_dispose(Object *p_object);
+	void queue_dispose(NodePath *p_node_path);
+	void queue_dispose(RID *p_rid);
+
+	_GodotSharp();
+	~_GodotSharp();
+};
+
+#endif // GD_MONO_H
diff --git a/modules/mono/mono_gd/gd_mono_assembly.cpp b/modules/mono/mono_gd/gd_mono_assembly.cpp
new file mode 100644
index 00000000000..a98537b9e10
--- /dev/null
+++ b/modules/mono/mono_gd/gd_mono_assembly.cpp
@@ -0,0 +1,327 @@
+/*************************************************************************/
+/*  gd_mono_assembly.cpp                                                 */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2017 Godot Engine contributors (cf. AUTHORS.md)    */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+#include "gd_mono_assembly.h"
+
+#include <mono/metadata/mono-debug.h>
+#include <mono/metadata/tokentype.h>
+
+#include "list.h"
+#include "os/file_access.h"
+#include "os/os.h"
+
+#include "../godotsharp_dirs.h"
+#include "gd_mono_class.h"
+
+MonoAssembly *gdmono_load_assembly_from(const String &p_name, const String &p_path) {
+
+	MonoDomain *domain = mono_domain_get();
+
+	GDMonoAssembly *assembly = memnew(GDMonoAssembly(p_name, p_path));
+	Error err = assembly->load(domain);
+	ERR_FAIL_COND_V(err != OK, NULL);
+
+	GDMono::get_singleton()->add_assembly(mono_domain_get_id(domain), assembly);
+
+	return assembly->get_assembly();
+}
+
+MonoAssembly *gdmono_MonoAssemblyPreLoad(MonoAssemblyName *aname, char **assemblies_path, void *user_data) {
+
+	(void)user_data; // UNUSED
+
+	MonoAssembly *assembly_loaded = mono_assembly_loaded(aname);
+	if (assembly_loaded) // Already loaded
+		return assembly_loaded;
+
+	static Vector<String> search_dirs;
+
+	if (search_dirs.empty()) {
+		search_dirs.push_back(GodotSharpDirs::get_res_temp_assemblies_dir());
+		search_dirs.push_back(GodotSharpDirs::get_res_assemblies_dir());
+		search_dirs.push_back(OS::get_singleton()->get_resource_dir());
+		search_dirs.push_back(OS::get_singleton()->get_executable_path().get_base_dir());
+
+		const char *rootdir = mono_assembly_getrootdir();
+		if (rootdir) {
+			search_dirs.push_back(String(rootdir).plus_file("mono").plus_file("4.5"));
+		}
+
+		while (assemblies_path) {
+			if (*assemblies_path)
+				search_dirs.push_back(*assemblies_path);
+			++assemblies_path;
+		}
+	}
+
+	String name = mono_assembly_name_get_name(aname);
+	bool has_extension = name.ends_with(".dll") || name.ends_with(".exe");
+
+	String path;
+
+	for (int i = 0; i < search_dirs.size(); i++) {
+		const String &search_dir = search_dirs[i];
+
+		if (has_extension) {
+			path = search_dir.plus_file(name);
+			if (FileAccess::exists(path))
+				return gdmono_load_assembly_from(name.get_basename(), path);
+		} else {
+			path = search_dir.plus_file(name + ".dll");
+			if (FileAccess::exists(path))
+				return gdmono_load_assembly_from(name, path);
+
+			path = search_dir.plus_file(name + ".exe");
+			if (FileAccess::exists(path))
+				return gdmono_load_assembly_from(name, path);
+		}
+	}
+
+	return NULL;
+}
+
+void GDMonoAssembly::initialize() {
+
+	mono_install_assembly_preload_hook(&gdmono_MonoAssemblyPreLoad, NULL);
+}
+
+Error GDMonoAssembly::load(MonoDomain *p_domain) {
+
+	ERR_FAIL_COND_V(loaded, ERR_FILE_ALREADY_IN_USE);
+
+	uint64_t last_modified_time = FileAccess::get_modified_time(path);
+
+	Vector<uint8_t> data = FileAccess::get_file_as_array(path);
+	ERR_FAIL_COND_V(data.empty(), ERR_FILE_CANT_READ);
+
+	String image_filename(path);
+
+	MonoImageOpenStatus status;
+
+	image = mono_image_open_from_data_with_name(
+			(char *)&data[0], data.size(),
+			true, &status, false,
+			image_filename.utf8().get_data());
+
+	ERR_FAIL_COND_V(status != MONO_IMAGE_OK || image == NULL, ERR_FILE_CANT_OPEN);
+
+#ifdef DEBUG_ENABLED
+	String pdb_path(path + ".pdb");
+
+	if (!FileAccess::exists(pdb_path)) {
+		pdb_path = path.get_basename() + ".pdb"; // without .dll
+
+		if (!FileAccess::exists(pdb_path))
+			goto no_pdb;
+	}
+
+	pdb_data.clear();
+	pdb_data = FileAccess::get_file_as_array(pdb_path);
+	mono_debug_open_image_from_memory(image, &pdb_data[0], pdb_data.size());
+
+no_pdb:
+
+#endif
+
+	assembly = mono_assembly_load_from_full(image, image_filename.utf8().get_data(), &status, false);
+
+	ERR_FAIL_COND_V(status != MONO_IMAGE_OK || assembly == NULL, ERR_FILE_CANT_OPEN);
+
+	if (mono_image_get_entry_point(image)) {
+		// TODO should this be removed? do we want to call main? what other effects does this have?
+		mono_jit_exec(p_domain, assembly, 0, NULL);
+	}
+
+	loaded = true;
+	modified_time = last_modified_time;
+
+	return OK;
+}
+
+Error GDMonoAssembly::wrapper_for_image(MonoImage *p_image) {
+
+	ERR_FAIL_COND_V(loaded, ERR_FILE_ALREADY_IN_USE);
+
+	assembly = mono_image_get_assembly(p_image);
+	ERR_FAIL_NULL_V(assembly, FAILED);
+
+	image = p_image;
+
+	mono_image_addref(image);
+
+	loaded = true;
+
+	return OK;
+}
+
+void GDMonoAssembly::unload() {
+
+	ERR_FAIL_COND(!loaded);
+
+#ifdef DEBUG_ENABLED
+	if (pdb_data.size()) {
+		mono_debug_close_image(image);
+		pdb_data.clear();
+	}
+#endif
+
+	for (Map<MonoClass *, GDMonoClass *>::Element *E = cached_raw.front(); E; E = E->next()) {
+		memdelete(E->value());
+	}
+
+	cached_classes.clear();
+	cached_raw.clear();
+
+	mono_image_close(image);
+
+	assembly = NULL;
+	image = NULL;
+	loaded = false;
+}
+
+GDMonoClass *GDMonoAssembly::get_class(const StringName &p_namespace, const StringName &p_name) {
+
+	ERR_FAIL_COND_V(!loaded, NULL);
+
+	ClassKey key(p_namespace, p_name);
+
+	GDMonoClass **match = cached_classes.getptr(key);
+
+	if (match)
+		return *match;
+
+	MonoClass *mono_class = mono_class_from_name(image, String(p_namespace).utf8(), String(p_name).utf8());
+
+	if (!mono_class)
+		return NULL;
+
+	GDMonoClass *wrapped_class = memnew(GDMonoClass(p_namespace, p_name, mono_class, this));
+
+	cached_classes[key] = wrapped_class;
+	cached_raw[mono_class] = wrapped_class;
+
+	return wrapped_class;
+}
+
+GDMonoClass *GDMonoAssembly::get_class(MonoClass *p_mono_class) {
+
+	ERR_FAIL_COND_V(!loaded, NULL);
+
+	Map<MonoClass *, GDMonoClass *>::Element *match = cached_raw.find(p_mono_class);
+
+	if (match)
+		return match->value();
+
+	StringName namespace_name = mono_class_get_namespace(p_mono_class);
+	StringName class_name = mono_class_get_name(p_mono_class);
+
+	GDMonoClass *wrapped_class = memnew(GDMonoClass(namespace_name, class_name, p_mono_class, this));
+
+	cached_classes[ClassKey(namespace_name, class_name)] = wrapped_class;
+	cached_raw[p_mono_class] = wrapped_class;
+
+	return wrapped_class;
+}
+
+GDMonoClass *GDMonoAssembly::get_object_derived_class(const StringName &p_class) {
+
+	GDMonoClass *match = NULL;
+
+	if (gdobject_class_cache_updated) {
+		Map<StringName, GDMonoClass *>::Element *result = gdobject_class_cache.find(p_class);
+
+		if (result)
+			match = result->get();
+	} else {
+		List<GDMonoClass *> nested_classes;
+
+		int rows = mono_image_get_table_rows(image, MONO_TABLE_TYPEDEF);
+
+		for (int i = 1; i < rows; i++) {
+			MonoClass *mono_class = mono_class_get(image, (i + 1) | MONO_TOKEN_TYPE_DEF);
+
+			if (!mono_class_is_assignable_from(CACHED_CLASS_RAW(GodotObject), mono_class))
+				continue;
+
+			GDMonoClass *current = get_class(mono_class);
+
+			if (!current)
+				continue;
+
+			nested_classes.push_back(current);
+
+			if (!match && current->get_name() == p_class)
+				match = current;
+
+			while (!nested_classes.empty()) {
+				GDMonoClass *current_nested = nested_classes.front()->get();
+				nested_classes.pop_back();
+
+				void *iter = NULL;
+
+				while (true) {
+					MonoClass *raw_nested = mono_class_get_nested_types(current_nested->get_raw(), &iter);
+
+					if (!raw_nested)
+						break;
+
+					GDMonoClass *nested_class = get_class(raw_nested);
+
+					if (nested_class) {
+						gdobject_class_cache.insert(nested_class->get_name(), nested_class);
+						nested_classes.push_back(nested_class);
+					}
+				}
+			}
+
+			gdobject_class_cache.insert(current->get_name(), current);
+		}
+
+		gdobject_class_cache_updated = true;
+	}
+
+	return match;
+}
+
+GDMonoAssembly::GDMonoAssembly(const String &p_name, const String &p_path) {
+
+	loaded = false;
+	gdobject_class_cache_updated = false;
+	name = p_name;
+	path = p_path;
+	modified_time = 0;
+	assembly = NULL;
+	image = NULL;
+}
+
+GDMonoAssembly::~GDMonoAssembly() {
+
+	if (loaded)
+		unload();
+}
diff --git a/modules/mono/mono_gd/gd_mono_assembly.h b/modules/mono/mono_gd/gd_mono_assembly.h
new file mode 100644
index 00000000000..89e091549c7
--- /dev/null
+++ b/modules/mono/mono_gd/gd_mono_assembly.h
@@ -0,0 +1,113 @@
+/*************************************************************************/
+/*  gd_mono_assembly.h                                                   */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2017 Godot Engine contributors (cf. AUTHORS.md)    */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+#ifndef GD_MONO_ASSEMBLY_H
+#define GD_MONO_ASSEMBLY_H
+
+#include <mono/jit/jit.h>
+#include <mono/metadata/assembly.h>
+
+#include "gd_mono_utils.h"
+#include "hash_map.h"
+#include "map.h"
+#include "ustring.h"
+
+class GDMonoAssembly {
+
+	struct ClassKey {
+		struct Hasher {
+			static _FORCE_INLINE_ uint32_t hash(const ClassKey &p_key) {
+				uint32_t hash = 0;
+
+				GDMonoUtils::hash_combine(hash, p_key.namespace_name.hash());
+				GDMonoUtils::hash_combine(hash, p_key.class_name.hash());
+
+				return hash;
+			}
+		};
+
+		_FORCE_INLINE_ bool operator==(const ClassKey &p_a) const {
+			return p_a.class_name == class_name && p_a.namespace_name == namespace_name;
+		}
+
+		ClassKey() {}
+
+		ClassKey(const StringName &p_namespace_name, const StringName &p_class_name) {
+			namespace_name = p_namespace_name;
+			class_name = p_class_name;
+		}
+
+		StringName namespace_name;
+		StringName class_name;
+	};
+
+	MonoAssembly *assembly;
+	MonoImage *image;
+
+	bool loaded;
+
+	String name;
+	String path;
+	uint64_t modified_time;
+
+	HashMap<ClassKey, GDMonoClass *, ClassKey::Hasher> cached_classes;
+	Map<MonoClass *, GDMonoClass *> cached_raw;
+
+	bool gdobject_class_cache_updated;
+	Map<StringName, GDMonoClass *> gdobject_class_cache;
+
+#ifdef DEBUG_ENABLED
+	Vector<uint8_t> pdb_data;
+#endif
+
+	friend class GDMono;
+	static void initialize();
+
+public:
+	Error load(MonoDomain *p_domain);
+	Error wrapper_for_image(MonoImage *p_image);
+	void unload();
+
+	_FORCE_INLINE_ bool is_loaded() const { return loaded; }
+	_FORCE_INLINE_ MonoImage *get_image() const { return image; }
+	_FORCE_INLINE_ MonoAssembly *get_assembly() const { return assembly; }
+	_FORCE_INLINE_ String get_name() const { return name; }
+	_FORCE_INLINE_ String get_path() const { return path; }
+	_FORCE_INLINE_ uint64_t get_modified_time() const { return modified_time; }
+
+	GDMonoClass *get_class(const StringName &p_namespace, const StringName &p_class);
+	GDMonoClass *get_class(MonoClass *p_mono_class);
+
+	GDMonoClass *get_object_derived_class(const StringName &p_class);
+
+	GDMonoAssembly(const String &p_name, const String &p_path = String());
+	~GDMonoAssembly();
+};
+
+#endif // GD_MONO_ASSEMBLY_H
diff --git a/modules/mono/mono_gd/gd_mono_class.cpp b/modules/mono/mono_gd/gd_mono_class.cpp
new file mode 100644
index 00000000000..0134ace5d7c
--- /dev/null
+++ b/modules/mono/mono_gd/gd_mono_class.cpp
@@ -0,0 +1,381 @@
+/*************************************************************************/
+/*  gd_mono_class.cpp                                                    */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2017 Godot Engine contributors (cf. AUTHORS.md)    */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+#include "gd_mono_class.h"
+
+#include <mono/metadata/attrdefs.h>
+
+#include "gd_mono_assembly.h"
+
+MonoType *GDMonoClass::get_raw_type(GDMonoClass *p_class) {
+
+	return mono_class_get_type(p_class->get_raw());
+}
+
+bool GDMonoClass::is_assignable_from(GDMonoClass *p_from) const {
+
+	return mono_class_is_assignable_from(mono_class, p_from->mono_class);
+}
+
+GDMonoClass *GDMonoClass::get_parent_class() {
+
+	if (assembly) {
+		MonoClass *parent_mono_class = mono_class_get_parent(mono_class);
+
+		if (parent_mono_class) {
+			return GDMono::get_singleton()->get_class(parent_mono_class);
+		}
+	}
+
+	return NULL;
+}
+
+bool GDMonoClass::has_method(const StringName &p_name) {
+
+	return get_method(p_name) != NULL;
+}
+
+bool GDMonoClass::has_attribute(GDMonoClass *p_attr_class) {
+
+#ifdef DEBUG_ENABLED
+	ERR_FAIL_NULL_V(p_attr_class, false);
+#endif
+
+	if (!attrs_fetched)
+		fetch_attributes();
+
+	if (!attributes)
+		return false;
+
+	return mono_custom_attrs_has_attr(attributes, p_attr_class->get_raw());
+}
+
+MonoObject *GDMonoClass::get_attribute(GDMonoClass *p_attr_class) {
+
+#ifdef DEBUG_ENABLED
+	ERR_FAIL_NULL_V(p_attr_class, NULL);
+#endif
+
+	if (!attrs_fetched)
+		fetch_attributes();
+
+	if (!attributes)
+		return NULL;
+
+	return mono_custom_attrs_get_attr(attributes, p_attr_class->get_raw());
+}
+
+void GDMonoClass::fetch_attributes() {
+
+	ERR_FAIL_COND(attributes != NULL);
+
+	attributes = mono_custom_attrs_from_class(get_raw());
+	attrs_fetched = true;
+}
+
+void GDMonoClass::fetch_methods_with_godot_api_checks(GDMonoClass *p_native_base) {
+
+	CRASH_COND(!CACHED_CLASS(GodotObject)->is_assignable_from(this));
+
+	if (methods_fetched)
+		return;
+
+	void *iter = NULL;
+	MonoMethod *raw_method = NULL;
+	while ((raw_method = mono_class_get_methods(get_raw(), &iter)) != NULL) {
+		StringName name = mono_method_get_name(raw_method);
+
+		GDMonoMethod *method = get_method(raw_method, name);
+		ERR_CONTINUE(!method);
+
+		if (method->get_name() != name) {
+
+#ifdef DEBUG_ENABLED
+			String fullname = method->get_ret_type_full_name() + " " + name + "(" + method->get_signature_desc(true) + ")";
+			WARN_PRINTS("Method `" + fullname + "` is hidden by Godot API method. Should be `" +
+						method->get_full_name_no_class() + "`. In class `" + namespace_name + "." + class_name + "`.");
+#endif
+			continue;
+		}
+
+#ifdef DEBUG_ENABLED
+		// For debug builds, we also fetched from native base classes as well before if this is not a native base class.
+		// This allows us to warn the user here if he is using snake_case by mistake.
+
+		if (p_native_base != this) {
+
+			GDMonoClass *native_top = p_native_base;
+			while (native_top) {
+				GDMonoMethod *m = native_top->get_method(name, method->get_parameters_count());
+
+				if (m && m->get_name() != name) {
+					// found
+					String fullname = m->get_ret_type_full_name() + " " + name + "(" + m->get_signature_desc(true) + ")";
+					WARN_PRINTS("Method `" + fullname + "` should be `" + m->get_full_name_no_class() +
+								"`. In class `" + namespace_name + "." + class_name + "`.");
+					break;
+				}
+
+				if (native_top == CACHED_CLASS(GodotObject))
+					break;
+
+				native_top = native_top->get_parent_class();
+			}
+		}
+#endif
+
+		uint32_t flags = mono_method_get_flags(method->mono_method, NULL);
+
+		if (!(flags & MONO_METHOD_ATTR_VIRTUAL))
+			continue;
+
+		// Virtual method of Godot Object derived type, let's try to find GodotMethod attribute
+
+		GDMonoClass *top = p_native_base;
+
+		while (top) {
+			GDMonoMethod *base_method = top->get_method(name, method->get_parameters_count());
+
+			if (base_method && base_method->has_attribute(CACHED_CLASS(GodotMethodAttribute))) {
+				// Found base method with GodotMethod attribute.
+				// We get the original API method name from this attribute.
+				// This name must point to the virtual method.
+
+				MonoObject *attr = base_method->get_attribute(CACHED_CLASS(GodotMethodAttribute));
+
+				StringName godot_method_name = CACHED_FIELD(GodotMethodAttribute, methodName)->get_string_value(attr);
+#ifdef DEBUG_ENABLED
+				CRASH_COND(godot_method_name == StringName());
+#endif
+				MethodKey key = MethodKey(godot_method_name, method->get_parameters_count());
+				GDMonoMethod **existing_method = methods.getptr(key);
+				if (existing_method)
+					memdelete(*existing_method); // Must delete old one
+				methods.set(key, method);
+
+				break;
+			}
+
+			if (top == CACHED_CLASS(GodotObject))
+				break;
+
+			top = top->get_parent_class();
+		}
+	}
+
+	methods_fetched = true;
+}
+
+GDMonoMethod *GDMonoClass::get_method(const StringName &p_name) {
+
+	ERR_FAIL_COND_V(!methods_fetched, NULL);
+
+	const MethodKey *k = NULL;
+
+	while ((k = methods.next(k))) {
+		if (k->name == p_name)
+			return methods.get(*k);
+	}
+
+	return NULL;
+}
+
+GDMonoMethod *GDMonoClass::get_method(const StringName &p_name, int p_params_count) {
+
+	MethodKey key = MethodKey(p_name, p_params_count);
+
+	GDMonoMethod **match = methods.getptr(key);
+
+	if (match)
+		return *match;
+
+	if (methods_fetched)
+		return NULL;
+
+	MonoMethod *raw_method = mono_class_get_method_from_name(mono_class, String(p_name).utf8().get_data(), p_params_count);
+
+	if (raw_method) {
+		GDMonoMethod *method = memnew(GDMonoMethod(p_name, raw_method));
+		methods.set(key, method);
+
+		return method;
+	}
+
+	return NULL;
+}
+
+GDMonoMethod *GDMonoClass::get_method(MonoMethod *p_raw_method) {
+
+	MonoMethodSignature *sig = mono_method_signature(p_raw_method);
+
+	int params_count = mono_signature_get_param_count(sig);
+	StringName method_name = mono_method_get_name(p_raw_method);
+
+	return get_method(p_raw_method, method_name, params_count);
+}
+
+GDMonoMethod *GDMonoClass::get_method(MonoMethod *p_raw_method, const StringName &p_name) {
+
+	MonoMethodSignature *sig = mono_method_signature(p_raw_method);
+	int params_count = mono_signature_get_param_count(sig);
+	return get_method(p_raw_method, p_name, params_count);
+}
+
+GDMonoMethod *GDMonoClass::get_method(MonoMethod *p_raw_method, const StringName &p_name, int p_params_count) {
+
+	ERR_FAIL_NULL_V(p_raw_method, NULL);
+
+	MethodKey key = MethodKey(p_name, p_params_count);
+
+	GDMonoMethod **match = methods.getptr(key);
+
+	if (match)
+		return *match;
+
+	GDMonoMethod *method = memnew(GDMonoMethod(p_name, p_raw_method));
+	methods.set(key, method);
+
+	return method;
+}
+
+GDMonoMethod *GDMonoClass::get_method_with_desc(const String &p_description, bool p_include_namespace) {
+
+	MonoMethodDesc *desc = mono_method_desc_new(p_description.utf8().get_data(), p_include_namespace);
+	MonoMethod *method = mono_method_desc_search_in_class(desc, mono_class);
+	mono_method_desc_free(desc);
+
+	return get_method(method);
+}
+
+GDMonoField *GDMonoClass::get_field(const StringName &p_name) {
+
+	Map<StringName, GDMonoField *>::Element *result = fields.find(p_name);
+
+	if (result)
+		return result->value();
+
+	if (fields_fetched)
+		return NULL;
+
+	MonoClassField *raw_field = mono_class_get_field_from_name(mono_class, String(p_name).utf8().get_data());
+
+	if (raw_field) {
+		GDMonoField *field = memnew(GDMonoField(raw_field, this));
+		fields.insert(p_name, field);
+
+		return field;
+	}
+
+	return NULL;
+}
+
+const Vector<GDMonoField *> &GDMonoClass::get_all_fields() {
+
+	if (fields_fetched)
+		return fields_list;
+
+	void *iter = NULL;
+	MonoClassField *raw_field = NULL;
+	while ((raw_field = mono_class_get_fields(get_raw(), &iter)) != NULL) {
+		StringName name = mono_field_get_name(raw_field);
+
+		Map<StringName, GDMonoField *>::Element *match = fields.find(name);
+
+		if (match) {
+			fields_list.push_back(match->get());
+		} else {
+			GDMonoField *field = memnew(GDMonoField(raw_field, this));
+			fields.insert(name, field);
+			fields_list.push_back(field);
+		}
+	}
+
+	fields_fetched = true;
+
+	return fields_list;
+}
+
+GDMonoClass::GDMonoClass(const StringName &p_namespace, const StringName &p_name, MonoClass *p_class, GDMonoAssembly *p_assembly) {
+
+	namespace_name = p_namespace;
+	class_name = p_name;
+	mono_class = p_class;
+	assembly = p_assembly;
+
+	attrs_fetched = false;
+	attributes = NULL;
+
+	methods_fetched = false;
+	fields_fetched = false;
+}
+
+GDMonoClass::~GDMonoClass() {
+
+	if (attributes) {
+		mono_custom_attrs_free(attributes);
+	}
+
+	for (Map<StringName, GDMonoField *>::Element *E = fields.front(); E; E = E->next()) {
+		memdelete(E->value());
+	}
+
+	{
+		// Ugly workaround...
+		// We may have duplicated values, because we redirect snake_case methods to PascalCasel (only Godot API methods).
+		// This way, we end with both the snake_case name and the PascalCasel name paired with the same method.
+		// Therefore, we must avoid deleting the same pointer twice.
+
+		int offset = 0;
+		Vector<GDMonoMethod *> deleted_methods;
+		deleted_methods.resize(methods.size());
+
+		const MethodKey *k = NULL;
+		while ((k = methods.next(k))) {
+			GDMonoMethod *method = methods.get(*k);
+
+			if (method) {
+				for (int i = 0; i < offset; i++) {
+					if (deleted_methods[i] == method) {
+						// Already deleted
+						goto already_deleted;
+					}
+				}
+
+				deleted_methods[offset] = method;
+				++offset;
+
+				memdelete(method);
+			}
+
+		already_deleted:;
+		}
+
+		methods.clear();
+	}
+}
diff --git a/modules/mono/mono_gd/gd_mono_class.h b/modules/mono/mono_gd/gd_mono_class.h
new file mode 100644
index 00000000000..1e725538798
--- /dev/null
+++ b/modules/mono/mono_gd/gd_mono_class.h
@@ -0,0 +1,124 @@
+/*************************************************************************/
+/*  gd_mono_class.h                                                      */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2017 Godot Engine contributors (cf. AUTHORS.md)    */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+#ifndef GD_MONO_CLASS_H
+#define GD_MONO_CLASS_H
+
+#include <mono/metadata/debug-helpers.h>
+
+#include "map.h"
+#include "ustring.h"
+
+#include "gd_mono_field.h"
+#include "gd_mono_header.h"
+#include "gd_mono_method.h"
+#include "gd_mono_utils.h"
+
+class GDMonoClass {
+	struct MethodKey {
+		struct Hasher {
+			static _FORCE_INLINE_ uint32_t hash(const MethodKey &p_key) {
+				uint32_t hash = 0;
+
+				GDMonoUtils::hash_combine(hash, p_key.name.hash());
+				GDMonoUtils::hash_combine(hash, HashMapHasherDefault::hash(p_key.params_count));
+
+				return hash;
+			}
+		};
+
+		_FORCE_INLINE_ bool operator==(const MethodKey &p_a) const {
+			return p_a.params_count == params_count && p_a.name == name;
+		}
+
+		MethodKey() {}
+
+		MethodKey(const StringName &p_name, int p_params_count) {
+			name = p_name;
+			params_count = p_params_count;
+		}
+
+		StringName name;
+		int params_count;
+	};
+
+	StringName namespace_name;
+	StringName class_name;
+
+	MonoClass *mono_class;
+	GDMonoAssembly *assembly;
+
+	bool attrs_fetched;
+	MonoCustomAttrInfo *attributes;
+
+	bool methods_fetched;
+	HashMap<MethodKey, GDMonoMethod *, MethodKey::Hasher> methods;
+
+	bool fields_fetched;
+	Map<StringName, GDMonoField *> fields;
+	Vector<GDMonoField *> fields_list;
+
+	friend class GDMonoAssembly;
+	GDMonoClass(const StringName &p_namespace, const StringName &p_name, MonoClass *p_class, GDMonoAssembly *p_assembly);
+
+public:
+	static MonoType *get_raw_type(GDMonoClass *p_class);
+
+	bool is_assignable_from(GDMonoClass *p_from) const;
+
+	_FORCE_INLINE_ StringName get_namespace() const { return namespace_name; }
+	_FORCE_INLINE_ StringName get_name() const { return class_name; }
+
+	_FORCE_INLINE_ MonoClass *get_raw() const { return mono_class; }
+	_FORCE_INLINE_ const GDMonoAssembly *get_assembly() const { return assembly; }
+
+	GDMonoClass *get_parent_class();
+
+	bool has_method(const StringName &p_name);
+
+	bool has_attribute(GDMonoClass *p_attr_class);
+	MonoObject *get_attribute(GDMonoClass *p_attr_class);
+
+	void fetch_attributes();
+	void fetch_methods_with_godot_api_checks(GDMonoClass *p_native_base);
+
+	GDMonoMethod *get_method(const StringName &p_name);
+	GDMonoMethod *get_method(const StringName &p_name, int p_params_count);
+	GDMonoMethod *get_method(MonoMethod *p_raw_method);
+	GDMonoMethod *get_method(MonoMethod *p_raw_method, const StringName &p_name);
+	GDMonoMethod *get_method(MonoMethod *p_raw_method, const StringName &p_name, int p_params_count);
+	GDMonoMethod *get_method_with_desc(const String &p_description, bool p_includes_namespace);
+
+	GDMonoField *get_field(const StringName &p_name);
+	const Vector<GDMonoField *> &get_all_fields();
+
+	~GDMonoClass();
+};
+
+#endif // GD_MONO_CLASS_H
diff --git a/modules/mono/mono_gd/gd_mono_field.cpp b/modules/mono/mono_gd/gd_mono_field.cpp
new file mode 100644
index 00000000000..0c64380e315
--- /dev/null
+++ b/modules/mono/mono_gd/gd_mono_field.cpp
@@ -0,0 +1,362 @@
+/*************************************************************************/
+/*  gd_mono_field.cpp                                                    */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2017 Godot Engine contributors (cf. AUTHORS.md)    */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+#include "gd_mono_field.h"
+
+#include <mono/metadata/attrdefs.h>
+
+#include "gd_mono_class.h"
+#include "gd_mono_marshal.h"
+
+void GDMonoField::set_value_raw(MonoObject *p_object, void *p_ptr) {
+	mono_field_set_value(p_object, mono_field, &p_ptr);
+}
+
+void GDMonoField::set_value(MonoObject *p_object, const Variant &p_value) {
+#define SET_FROM_STRUCT_AND_BREAK(m_type)                \
+	{                                                    \
+		const m_type &val = p_value.operator m_type();   \
+		MARSHALLED_OUT(m_type, val, raw);                \
+		mono_field_set_value(p_object, mono_field, raw); \
+		break;                                           \
+	}
+
+#define SET_FROM_PRIMITIVE(m_type)                        \
+	{                                                     \
+		m_type val = p_value.operator m_type();           \
+		mono_field_set_value(p_object, mono_field, &val); \
+	}
+
+#define SET_FROM_ARRAY_AND_BREAK(m_type)                                                       \
+	{                                                                                          \
+		MonoArray *managed = GDMonoMarshal::m_type##_to_mono_array(p_value.operator m_type()); \
+		mono_field_set_value(p_object, mono_field, &managed);                                  \
+		break;                                                                                 \
+	}
+
+	switch (type.type_encoding) {
+		case MONO_TYPE_BOOLEAN: {
+			SET_FROM_PRIMITIVE(bool);
+		} break;
+
+		case MONO_TYPE_I1: {
+			SET_FROM_PRIMITIVE(signed char);
+		} break;
+		case MONO_TYPE_I2: {
+			SET_FROM_PRIMITIVE(signed short);
+		} break;
+		case MONO_TYPE_I4: {
+			SET_FROM_PRIMITIVE(signed int);
+		} break;
+		case MONO_TYPE_I8: {
+			SET_FROM_PRIMITIVE(int64_t);
+		} break;
+
+		case MONO_TYPE_U1: {
+			SET_FROM_PRIMITIVE(unsigned char);
+		} break;
+		case MONO_TYPE_U2: {
+			SET_FROM_PRIMITIVE(unsigned short);
+		} break;
+		case MONO_TYPE_U4: {
+			SET_FROM_PRIMITIVE(unsigned int);
+		} break;
+		case MONO_TYPE_U8: {
+			SET_FROM_PRIMITIVE(uint64_t);
+		} break;
+
+		case MONO_TYPE_R4: {
+			SET_FROM_PRIMITIVE(float);
+		} break;
+
+		case MONO_TYPE_R8: {
+			SET_FROM_PRIMITIVE(double);
+		} break;
+
+		case MONO_TYPE_STRING: {
+			MonoString *mono_string = GDMonoMarshal::mono_string_from_godot(p_value);
+			mono_field_set_value(p_object, mono_field, mono_string);
+		} break;
+
+		case MONO_TYPE_VALUETYPE: {
+			GDMonoClass *tclass = type.type_class;
+
+			if (tclass == CACHED_CLASS(Vector2))
+				SET_FROM_STRUCT_AND_BREAK(Vector2);
+
+			if (tclass == CACHED_CLASS(Rect2))
+				SET_FROM_STRUCT_AND_BREAK(Rect2);
+
+			if (tclass == CACHED_CLASS(Transform2D))
+				SET_FROM_STRUCT_AND_BREAK(Transform2D);
+
+			if (tclass == CACHED_CLASS(Vector3))
+				SET_FROM_STRUCT_AND_BREAK(Vector3);
+
+			if (tclass == CACHED_CLASS(Basis))
+				SET_FROM_STRUCT_AND_BREAK(Basis);
+
+			if (tclass == CACHED_CLASS(Quat))
+				SET_FROM_STRUCT_AND_BREAK(Quat);
+
+			if (tclass == CACHED_CLASS(Transform))
+				SET_FROM_STRUCT_AND_BREAK(Transform);
+
+			if (tclass == CACHED_CLASS(Rect3))
+				SET_FROM_STRUCT_AND_BREAK(Rect3);
+
+			if (tclass == CACHED_CLASS(Color))
+				SET_FROM_STRUCT_AND_BREAK(Color);
+
+			if (tclass == CACHED_CLASS(Plane))
+				SET_FROM_STRUCT_AND_BREAK(Plane);
+
+			ERR_EXPLAIN(String() + "Attempted to set the value of a field of unmarshallable type: " + tclass->get_name());
+			ERR_FAIL();
+		} break;
+
+		case MONO_TYPE_ARRAY:
+		case MONO_TYPE_SZARRAY: {
+			MonoArrayType *array_type = mono_type_get_array_type(GDMonoClass::get_raw_type(type.type_class));
+
+			if (array_type->eklass == CACHED_CLASS_RAW(MonoObject))
+				SET_FROM_ARRAY_AND_BREAK(Array);
+
+			if (array_type->eklass == CACHED_CLASS_RAW(uint8_t))
+				SET_FROM_ARRAY_AND_BREAK(PoolByteArray);
+
+			if (array_type->eklass == CACHED_CLASS_RAW(int32_t))
+				SET_FROM_ARRAY_AND_BREAK(PoolIntArray);
+
+			if (array_type->eklass == REAL_T_MONOCLASS)
+				SET_FROM_ARRAY_AND_BREAK(PoolRealArray);
+
+			if (array_type->eklass == CACHED_CLASS_RAW(String))
+				SET_FROM_ARRAY_AND_BREAK(PoolStringArray);
+
+			if (array_type->eklass == CACHED_CLASS_RAW(Vector2))
+				SET_FROM_ARRAY_AND_BREAK(PoolVector2Array);
+
+			if (array_type->eklass == CACHED_CLASS_RAW(Vector3))
+				SET_FROM_ARRAY_AND_BREAK(PoolVector3Array);
+
+			if (array_type->eklass == CACHED_CLASS_RAW(Color))
+				SET_FROM_ARRAY_AND_BREAK(PoolColorArray);
+
+			ERR_EXPLAIN(String() + "Attempted to convert Variant to a managed array of unmarshallable element type.");
+			ERR_FAIL();
+		} break;
+
+		case MONO_TYPE_CLASS: {
+			GDMonoClass *type_class = type.type_class;
+
+			// GodotObject
+			if (CACHED_CLASS(GodotObject)->is_assignable_from(type_class)) {
+				MonoObject *managed = GDMonoUtils::unmanaged_get_managed(p_value.operator Object *());
+				mono_field_set_value(p_object, mono_field, &managed);
+				break;
+			}
+
+			if (CACHED_CLASS(NodePath) == type_class) {
+				MonoObject *managed = GDMonoUtils::create_managed_from(p_value.operator NodePath());
+				mono_field_set_value(p_object, mono_field, &managed);
+				break;
+			}
+
+			if (CACHED_CLASS(RID) == type_class) {
+				MonoObject *managed = GDMonoUtils::create_managed_from(p_value.operator RID());
+				mono_field_set_value(p_object, mono_field, &managed);
+				break;
+			}
+
+			ERR_EXPLAIN(String() + "Attempted to set the value of a field of unmarshallable type: " + type_class->get_name());
+			ERR_FAIL();
+		} break;
+
+		case MONO_TYPE_OBJECT: {
+			GDMonoClass *type_class = type.type_class;
+
+			// Variant
+			switch (p_value.get_type()) {
+				case Variant::BOOL: {
+					SET_FROM_PRIMITIVE(bool);
+				} break;
+				case Variant::INT: {
+					SET_FROM_PRIMITIVE(int);
+				} break;
+				case Variant::REAL: {
+#ifdef REAL_T_IS_DOUBLE
+					SET_FROM_PRIMITIVE(double);
+#else
+					SET_FROM_PRIMITIVE(float);
+#endif
+				} break;
+				case Variant::STRING: {
+					MonoString *mono_string = GDMonoMarshal::mono_string_from_godot(p_value);
+					mono_field_set_value(p_object, mono_field, mono_string);
+				} break;
+				case Variant::VECTOR2: SET_FROM_STRUCT_AND_BREAK(Vector2);
+				case Variant::RECT2: SET_FROM_STRUCT_AND_BREAK(Rect2);
+				case Variant::VECTOR3: SET_FROM_STRUCT_AND_BREAK(Vector3);
+				case Variant::TRANSFORM2D: SET_FROM_STRUCT_AND_BREAK(Transform2D);
+				case Variant::PLANE: SET_FROM_STRUCT_AND_BREAK(Plane);
+				case Variant::QUAT: SET_FROM_STRUCT_AND_BREAK(Quat);
+				case Variant::RECT3: SET_FROM_STRUCT_AND_BREAK(Rect3);
+				case Variant::BASIS: SET_FROM_STRUCT_AND_BREAK(Basis);
+				case Variant::TRANSFORM: SET_FROM_STRUCT_AND_BREAK(Transform);
+				case Variant::COLOR: SET_FROM_STRUCT_AND_BREAK(Color);
+				case Variant::NODE_PATH: {
+					MonoObject *managed = GDMonoUtils::create_managed_from(p_value.operator NodePath());
+					mono_field_set_value(p_object, mono_field, &managed);
+				} break;
+				case Variant::_RID: {
+					MonoObject *managed = GDMonoUtils::create_managed_from(p_value.operator RID());
+					mono_field_set_value(p_object, mono_field, &managed);
+				} break;
+				case Variant::OBJECT: {
+					MonoObject *managed = GDMonoUtils::unmanaged_get_managed(p_value.operator Object *());
+					mono_field_set_value(p_object, mono_field, managed);
+					break;
+				}
+				case Variant::DICTIONARY: {
+					MonoObject *managed = GDMonoMarshal::Dictionary_to_mono_object(p_value.operator Dictionary());
+					mono_field_set_value(p_object, mono_field, &managed);
+				} break;
+				case Variant::ARRAY: SET_FROM_ARRAY_AND_BREAK(Array);
+				case Variant::POOL_BYTE_ARRAY: SET_FROM_ARRAY_AND_BREAK(PoolByteArray);
+				case Variant::POOL_INT_ARRAY: SET_FROM_ARRAY_AND_BREAK(PoolIntArray);
+				case Variant::POOL_REAL_ARRAY: SET_FROM_ARRAY_AND_BREAK(PoolRealArray);
+				case Variant::POOL_STRING_ARRAY: SET_FROM_ARRAY_AND_BREAK(PoolStringArray);
+				case Variant::POOL_VECTOR2_ARRAY: SET_FROM_ARRAY_AND_BREAK(PoolVector2Array);
+				case Variant::POOL_VECTOR3_ARRAY: SET_FROM_ARRAY_AND_BREAK(PoolVector3Array);
+				case Variant::POOL_COLOR_ARRAY: SET_FROM_ARRAY_AND_BREAK(PoolColorArray);
+#undef SET_FROM_ARRAY_AND_BREAK
+				default: break;
+			}
+		} break;
+
+		case MONO_TYPE_GENERICINST: {
+			if (CACHED_RAW_MONO_CLASS(Dictionary) == type.type_class->get_raw()) {
+				MonoObject *managed = GDMonoMarshal::Dictionary_to_mono_object(p_value.operator Dictionary());
+				mono_field_set_value(p_object, mono_field, &managed);
+				break;
+			}
+		} break;
+
+		default: {
+			ERR_PRINTS(String() + "Attempted to set the value of a field of unexpected type encoding: " + itos(type.type_encoding));
+		} break;
+	}
+
+#undef SET_FROM_STRUCT_AND_BREAK
+#undef SET_FROM_PRIMITIVE
+}
+
+bool GDMonoField::get_bool_value(MonoObject *p_object) {
+	return UNBOX_BOOLEAN(get_value(p_object));
+}
+
+int GDMonoField::get_int_value(MonoObject *p_object) {
+	return UNBOX_INT32(get_value(p_object));
+}
+
+String GDMonoField::get_string_value(MonoObject *p_object) {
+	MonoObject *val = get_value(p_object);
+	return val ? GDMonoMarshal::mono_string_to_godot((MonoString *)val) : String();
+}
+
+bool GDMonoField::has_attribute(GDMonoClass *p_attr_class) {
+	ERR_FAIL_NULL_V(p_attr_class, false);
+
+	if (!attrs_fetched)
+		fetch_attributes();
+
+	if (!attributes)
+		return false;
+
+	return mono_custom_attrs_has_attr(attributes, p_attr_class->get_raw());
+}
+
+MonoObject *GDMonoField::get_attribute(GDMonoClass *p_attr_class) {
+	ERR_FAIL_NULL_V(p_attr_class, NULL);
+
+	if (!attrs_fetched)
+		fetch_attributes();
+
+	if (!attributes)
+		return NULL;
+
+	return mono_custom_attrs_get_attr(attributes, p_attr_class->get_raw());
+}
+
+void GDMonoField::fetch_attributes() {
+	ERR_FAIL_COND(attributes != NULL);
+	attributes = mono_custom_attrs_from_field(owner->get_raw(), get_raw());
+	attrs_fetched = true;
+}
+
+bool GDMonoField::is_static() {
+	return mono_field_get_flags(mono_field) & MONO_FIELD_ATTR_STATIC;
+}
+
+GDMono::MemberVisibility GDMonoField::get_visibility() {
+	switch (mono_field_get_flags(mono_field) & MONO_FIELD_ATTR_FIELD_ACCESS_MASK) {
+		case MONO_FIELD_ATTR_PRIVATE:
+			return GDMono::PRIVATE;
+		case MONO_FIELD_ATTR_FAM_AND_ASSEM:
+			return GDMono::PROTECTED_AND_INTERNAL;
+		case MONO_FIELD_ATTR_ASSEMBLY:
+			return GDMono::INTERNAL;
+		case MONO_FIELD_ATTR_FAMILY:
+			return GDMono::PROTECTED;
+		case MONO_FIELD_ATTR_PUBLIC:
+			return GDMono::PUBLIC;
+		default:
+			ERR_FAIL_V(GDMono::PRIVATE);
+	}
+}
+
+GDMonoField::GDMonoField(MonoClassField *p_raw_field, GDMonoClass *p_owner) {
+	owner = p_owner;
+	mono_field = p_raw_field;
+	name = mono_field_get_name(mono_field);
+	MonoType *field_type = mono_field_get_type(mono_field);
+	type.type_encoding = mono_type_get_type(field_type);
+	MonoClass *field_type_class = mono_class_from_mono_type(field_type);
+	type.type_class = GDMono::get_singleton()->get_class(field_type_class);
+
+	attrs_fetched = false;
+	attributes = NULL;
+}
+
+GDMonoField::~GDMonoField() {
+	if (attributes) {
+		mono_custom_attrs_free(attributes);
+	}
+}
diff --git a/modules/mono/mono_gd/gd_mono_field.h b/modules/mono/mono_gd/gd_mono_field.h
new file mode 100644
index 00000000000..b7e1942d71a
--- /dev/null
+++ b/modules/mono/mono_gd/gd_mono_field.h
@@ -0,0 +1,74 @@
+/*************************************************************************/
+/*  gd_mono_field.h                                                      */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2017 Godot Engine contributors (cf. AUTHORS.md)    */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+#ifndef GDMONOFIELD_H
+#define GDMONOFIELD_H
+
+#include "gd_mono.h"
+#include "gd_mono_header.h"
+
+class GDMonoField {
+	GDMonoClass *owner;
+	MonoClassField *mono_field;
+
+	String name;
+	ManagedType type;
+
+	bool attrs_fetched;
+	MonoCustomAttrInfo *attributes;
+
+public:
+	_FORCE_INLINE_ String get_name() const { return name; }
+	_FORCE_INLINE_ ManagedType get_type() const { return type; }
+
+	_FORCE_INLINE_ MonoClassField *get_raw() const { return mono_field; }
+
+	void set_value_raw(MonoObject *p_object, void *p_ptr);
+	void set_value(MonoObject *p_object, const Variant &p_value);
+
+	_FORCE_INLINE_ MonoObject *get_value(MonoObject *p_object) {
+		return mono_field_get_value_object(mono_domain_get(), mono_field, p_object);
+	}
+
+	bool get_bool_value(MonoObject *p_object);
+	int get_int_value(MonoObject *p_object);
+	String get_string_value(MonoObject *p_object);
+
+	bool has_attribute(GDMonoClass *p_attr_class);
+	MonoObject *get_attribute(GDMonoClass *p_attr_class);
+	void fetch_attributes();
+
+	bool is_static();
+	GDMono::MemberVisibility get_visibility();
+
+	GDMonoField(MonoClassField *p_raw_field, GDMonoClass *p_owner);
+	~GDMonoField();
+};
+
+#endif // GDMONOFIELD_H
diff --git a/modules/mono/mono_gd/gd_mono_header.h b/modules/mono/mono_gd/gd_mono_header.h
new file mode 100644
index 00000000000..803d394f96c
--- /dev/null
+++ b/modules/mono/mono_gd/gd_mono_header.h
@@ -0,0 +1,59 @@
+/*************************************************************************/
+/*  gd_mono_header.h                                                     */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2017 Godot Engine contributors (cf. AUTHORS.md)    */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+#ifndef GD_MONO_HEADER_H
+#define GD_MONO_HEADER_H
+
+#include "int_types.h"
+
+class GDMonoAssembly;
+class GDMonoClass;
+class GDMonoMethod;
+class GDMonoField;
+
+struct ManagedType {
+	int type_encoding;
+	GDMonoClass *type_class;
+
+	ManagedType() {
+		type_class = 0;
+	}
+};
+
+typedef union {
+	uint32_t _uint32;
+	float _float;
+} mono_float;
+
+typedef union {
+	uint64_t _uint64;
+	float _double;
+} mono_double;
+
+#endif // GD_MONO_HEADER_H
diff --git a/modules/mono/mono_gd/gd_mono_internals.cpp b/modules/mono/mono_gd/gd_mono_internals.cpp
new file mode 100644
index 00000000000..cfe2148b808
--- /dev/null
+++ b/modules/mono/mono_gd/gd_mono_internals.cpp
@@ -0,0 +1,66 @@
+/*************************************************************************/
+/*  godotsharp_internals.cpp                                             */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2017 Godot Engine contributors (cf. AUTHORS.md)    */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+#include "gd_mono_internals.h"
+
+#include "../csharp_script.h"
+#include "../mono_gc_handle.h"
+#include "gd_mono_utils.h"
+
+namespace GDMonoInternals {
+
+void tie_managed_to_unmanaged(MonoObject *managed, Object *unmanaged) {
+
+	// This method should not fail
+
+	CRASH_COND(!unmanaged);
+
+	// All mono objects created from the managed world (e.g.: `new Player()`)
+	// need to have a CSharpScript in order for their methods to be callable from the unmanaged side
+
+	Reference *ref = Object::cast_to<Reference>(unmanaged);
+
+	GDMonoClass *klass = GDMonoUtils::get_object_class(managed);
+
+	CRASH_COND(!klass);
+
+	Ref<MonoGCHandle> gchandle = ref ? MonoGCHandle::create_weak(managed) :
+									   MonoGCHandle::create_strong(managed);
+
+	Ref<CSharpScript> script = CSharpScript::create_for_managed_type(klass);
+
+	CRASH_COND(script.is_null());
+
+	ScriptInstance *si = CSharpInstance::create_for_managed_type(unmanaged, script.ptr(), gchandle);
+
+	unmanaged->set_script_and_instance(script.get_ref_ptr(), si);
+
+	return;
+}
+}
diff --git a/modules/mono/mono_gd/gd_mono_internals.h b/modules/mono/mono_gd/gd_mono_internals.h
new file mode 100644
index 00000000000..6bdf4a6c468
--- /dev/null
+++ b/modules/mono/mono_gd/gd_mono_internals.h
@@ -0,0 +1,42 @@
+/*************************************************************************/
+/*  godotsharp_internals.h                                               */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2017 Godot Engine contributors (cf. AUTHORS.md)    */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+#ifndef GD_MONO_INTERNALS_H
+#define GD_MONO_INTERNALS_H
+
+#include <mono/jit/jit.h>
+
+#include "core/object.h"
+
+namespace GDMonoInternals {
+
+void tie_managed_to_unmanaged(MonoObject *managed, Object *unmanaged);
+}
+
+#endif // GD_MONO_INTERNALS_H
diff --git a/modules/mono/mono_gd/gd_mono_log.cpp b/modules/mono/mono_gd/gd_mono_log.cpp
new file mode 100644
index 00000000000..e4733488977
--- /dev/null
+++ b/modules/mono/mono_gd/gd_mono_log.cpp
@@ -0,0 +1,175 @@
+/*************************************************************************/
+/*  gd_mono_log.cpp                                                      */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2017 Godot Engine contributors (cf. AUTHORS.md)    */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+#include "gd_mono_log.h"
+
+#include <mono/utils/mono-logger.h>
+#include <stdlib.h> // abort
+
+#include "os/dir_access.h"
+#include "os/os.h"
+
+#include "../godotsharp_dirs.h"
+
+static int log_level_get_id(const char *p_log_level) {
+
+	const char *valid_log_levels[] = { "error", "critical", "warning", "message", "info", "debug", NULL };
+
+	int i = 0;
+	while (valid_log_levels[i]) {
+		if (!strcmp(valid_log_levels[i], p_log_level))
+			return i;
+		i++;
+	}
+
+	return -1;
+}
+
+void gdmono_MonoLogCallback(const char *log_domain, const char *log_level, const char *message, mono_bool fatal, void *user_data) {
+
+	FileAccess *f = GDMonoLog::get_singleton()->get_log_file();
+
+	if (GDMonoLog::get_singleton()->get_log_level_id() >= log_level_get_id(log_level)) {
+		String text(message);
+		text += " (in domain ";
+		text += log_domain;
+		if (log_level) {
+			text += ", ";
+			text += log_level;
+		}
+		text += ")\n";
+
+		f->seek_end();
+		f->store_string(text);
+	}
+
+	if (fatal) {
+		ERR_PRINTS("Mono: FALTAL ERROR, ABORTING! Logfile: " + GDMonoLog::get_singleton()->get_log_file_path() + "\n");
+		abort();
+	}
+}
+
+GDMonoLog *GDMonoLog::singleton = NULL;
+
+bool GDMonoLog::_try_create_logs_dir(const String &p_logs_dir) {
+
+	if (!DirAccess::exists(p_logs_dir)) {
+		DirAccessRef diraccess = DirAccess::create(DirAccess::ACCESS_FILESYSTEM);
+		ERR_FAIL_COND_V(!diraccess, false);
+		Error logs_mkdir_err = diraccess->make_dir_recursive(p_logs_dir);
+		ERR_EXPLAIN("Failed to create mono logs directory");
+		ERR_FAIL_COND_V(logs_mkdir_err != OK, false);
+	}
+
+	return true;
+}
+
+void GDMonoLog::_open_log_file(const String &p_file_path) {
+
+	log_file = FileAccess::open(p_file_path, FileAccess::WRITE);
+
+	ERR_EXPLAIN("Failed to create log file");
+	ERR_FAIL_COND(!log_file);
+}
+
+void GDMonoLog::_delete_old_log_files(const String &p_logs_dir) {
+
+	static const uint64_t MAX_SECS = 5 * 86400;
+
+	DirAccessRef da = DirAccess::create(DirAccess::ACCESS_FILESYSTEM);
+	ERR_FAIL_COND(!da);
+
+	Error err = da->change_dir(p_logs_dir);
+	ERR_FAIL_COND(err != OK);
+
+	ERR_FAIL_COND(da->list_dir_begin() != OK);
+
+	String current;
+	while ((current = da->get_next()).length()) {
+		if (da->current_is_dir())
+			continue;
+		if (!current.ends_with(".txt"))
+			continue;
+
+		String name = current.get_basename();
+		uint64_t unixtime = (uint64_t)name.to_int64();
+
+		if (OS::get_singleton()->get_unix_time() - unixtime > MAX_SECS) {
+			da->remove(current);
+		}
+	}
+
+	da->list_dir_end();
+}
+
+void GDMonoLog::initialize() {
+
+#ifdef DEBUG_ENABLED
+	const char *log_level = "debug";
+#else
+	const char *log_level = "warning";
+#endif
+
+	String logs_dir = GodotSharpDirs::get_mono_logs_dir();
+
+	if (_try_create_logs_dir(logs_dir)) {
+		_delete_old_log_files(logs_dir);
+
+		log_file_path = logs_dir.plus_file(String::num_int64(OS::get_singleton()->get_unix_time()) + ".txt");
+		_open_log_file(log_file_path);
+	}
+
+	mono_trace_set_level_string(log_level);
+	log_level_id = log_level_get_id(log_level);
+
+	if (log_file) {
+		if (OS::get_singleton()->is_stdout_verbose())
+			OS::get_singleton()->print(String("Mono: Logfile is " + log_file_path + "\n").utf8());
+		mono_trace_set_log_handler(gdmono_MonoLogCallback, this);
+	} else {
+		OS::get_singleton()->printerr("Mono: No log file, using default log handler\n");
+	}
+}
+
+GDMonoLog::GDMonoLog() {
+
+	singleton = this;
+
+	log_level_id = -1;
+}
+
+GDMonoLog::~GDMonoLog() {
+
+	singleton = NULL;
+
+	if (log_file) {
+		log_file->close();
+		memdelete(log_file);
+	}
+}
diff --git a/modules/mono/mono_gd/gd_mono_log.h b/modules/mono/mono_gd/gd_mono_log.h
new file mode 100644
index 00000000000..497f1e53171
--- /dev/null
+++ b/modules/mono/mono_gd/gd_mono_log.h
@@ -0,0 +1,61 @@
+/*************************************************************************/
+/*  gd_mono_log.h                                                        */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2017 Godot Engine contributors (cf. AUTHORS.md)    */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+#ifndef GD_MONO_LOG_H
+#define GD_MONO_LOG_H
+
+#include "os/file_access.h"
+
+class GDMonoLog {
+
+	int log_level_id;
+
+	FileAccess *log_file;
+	String log_file_path;
+
+	bool _try_create_logs_dir(const String &p_logs_dir);
+	void _open_log_file(const String &p_file_path);
+	void _delete_old_log_files(const String &p_logs_dir);
+
+	static GDMonoLog *singleton;
+
+public:
+	_FORCE_INLINE_ static GDMonoLog *get_singleton() { return singleton; }
+
+	void initialize();
+
+	_FORCE_INLINE_ FileAccess *get_log_file() { return log_file; }
+	_FORCE_INLINE_ String get_log_file_path() { return log_file_path; }
+	_FORCE_INLINE_ int get_log_level_id() { return log_level_id; }
+
+	GDMonoLog();
+	~GDMonoLog();
+};
+
+#endif // GD_MONO_LOG_H
diff --git a/modules/mono/mono_gd/gd_mono_marshal.cpp b/modules/mono/mono_gd/gd_mono_marshal.cpp
new file mode 100644
index 00000000000..b5419952de0
--- /dev/null
+++ b/modules/mono/mono_gd/gd_mono_marshal.cpp
@@ -0,0 +1,856 @@
+/*************************************************************************/
+/*  gd_mono_marshal.cpp                                                  */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2017 Godot Engine contributors (cf. AUTHORS.md)    */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+#include "gd_mono_marshal.h"
+
+#include "gd_mono.h"
+#include "gd_mono_class.h"
+
+namespace GDMonoMarshal {
+
+#define RETURN_BOXED_STRUCT(m_t, m_var_in)                                    \
+	{                                                                         \
+		const m_t &m_in = m_var_in->operator m_t();                           \
+		MARSHALLED_OUT(m_t, m_in, raw);                                       \
+		return mono_value_box(mono_domain_get(), CACHED_CLASS_RAW(m_t), raw); \
+	}
+
+#define RETURN_UNBOXED_STRUCT(m_t, m_var_in)    \
+	{                                           \
+		float *raw = UNBOX_FLOAT_PTR(m_var_in); \
+		MARSHALLED_IN(m_t, raw, ret);           \
+		return ret;                             \
+	}
+
+Variant::Type managed_to_variant_type(const ManagedType &p_type) {
+	switch (p_type.type_encoding) {
+		case MONO_TYPE_BOOLEAN:
+			return Variant::BOOL;
+
+		case MONO_TYPE_I1:
+			return Variant::INT;
+		case MONO_TYPE_I2:
+			return Variant::INT;
+		case MONO_TYPE_I4:
+			return Variant::INT;
+		case MONO_TYPE_I8:
+			return Variant::INT;
+
+		case MONO_TYPE_U1:
+			return Variant::INT;
+		case MONO_TYPE_U2:
+			return Variant::INT;
+		case MONO_TYPE_U4:
+			return Variant::INT;
+		case MONO_TYPE_U8:
+			return Variant::INT;
+
+		case MONO_TYPE_R4:
+			return Variant::REAL;
+		case MONO_TYPE_R8:
+			return Variant::REAL;
+
+		case MONO_TYPE_STRING: {
+			return Variant::STRING;
+		} break;
+
+		case MONO_TYPE_VALUETYPE: {
+			GDMonoClass *tclass = p_type.type_class;
+
+			if (tclass == CACHED_CLASS(Vector2))
+				return Variant::VECTOR2;
+
+			if (tclass == CACHED_CLASS(Rect2))
+				return Variant::RECT2;
+
+			if (tclass == CACHED_CLASS(Transform2D))
+				return Variant::TRANSFORM2D;
+
+			if (tclass == CACHED_CLASS(Vector3))
+				return Variant::VECTOR3;
+
+			if (tclass == CACHED_CLASS(Basis))
+				return Variant::BASIS;
+
+			if (tclass == CACHED_CLASS(Quat))
+				return Variant::QUAT;
+
+			if (tclass == CACHED_CLASS(Transform))
+				return Variant::TRANSFORM;
+
+			if (tclass == CACHED_CLASS(Rect3))
+				return Variant::RECT3;
+
+			if (tclass == CACHED_CLASS(Color))
+				return Variant::COLOR;
+
+			if (tclass == CACHED_CLASS(Plane))
+				return Variant::PLANE;
+		} break;
+
+		case MONO_TYPE_ARRAY:
+		case MONO_TYPE_SZARRAY: {
+			MonoArrayType *array_type = mono_type_get_array_type(GDMonoClass::get_raw_type(p_type.type_class));
+
+			if (array_type->eklass == CACHED_CLASS_RAW(MonoObject))
+				return Variant::ARRAY;
+
+			if (array_type->eklass == CACHED_CLASS_RAW(uint8_t))
+				return Variant::POOL_BYTE_ARRAY;
+
+			if (array_type->eklass == CACHED_CLASS_RAW(int32_t))
+				return Variant::POOL_INT_ARRAY;
+
+			if (array_type->eklass == REAL_T_MONOCLASS)
+				return Variant::POOL_REAL_ARRAY;
+
+			if (array_type->eklass == CACHED_CLASS_RAW(String))
+				return Variant::POOL_STRING_ARRAY;
+
+			if (array_type->eklass == CACHED_CLASS_RAW(Vector2))
+				return Variant::POOL_VECTOR2_ARRAY;
+
+			if (array_type->eklass == CACHED_CLASS_RAW(Vector3))
+				return Variant::POOL_VECTOR3_ARRAY;
+
+			if (array_type->eklass == CACHED_CLASS_RAW(Color))
+				return Variant::POOL_COLOR_ARRAY;
+		} break;
+
+		case MONO_TYPE_CLASS: {
+			GDMonoClass *type_class = p_type.type_class;
+
+			// GodotObject
+			if (CACHED_CLASS(GodotObject)->is_assignable_from(type_class)) {
+				return Variant::OBJECT;
+			}
+
+			if (CACHED_CLASS(NodePath) == type_class) {
+				return Variant::NODE_PATH;
+			}
+
+			if (CACHED_CLASS(RID) == type_class) {
+				return Variant::_RID;
+			}
+		} break;
+
+		case MONO_TYPE_GENERICINST: {
+			if (CACHED_RAW_MONO_CLASS(Dictionary) == p_type.type_class->get_raw()) {
+				return Variant::DICTIONARY;
+			}
+		} break;
+	}
+
+	// No error, the caller will decide what to do in this case
+	return Variant::NIL;
+}
+
+String mono_to_utf8_string(MonoString *p_mono_string) {
+	MonoError error;
+	char *utf8 = mono_string_to_utf8_checked(p_mono_string, &error);
+
+	ERR_EXPLAIN("Conversion of MonoString to UTF8 failed.");
+	ERR_FAIL_COND_V(!mono_error_ok(&error), String());
+
+	String ret = String::utf8(utf8);
+
+	mono_free(utf8);
+
+	return ret;
+}
+
+String mono_to_utf16_string(MonoString *p_mono_string) {
+	int len = mono_string_length(p_mono_string);
+	String ret;
+
+	if (len == 0)
+		return ret;
+
+	ret.resize(len + 1);
+	ret.set(len, 0);
+
+	CharType *src = (CharType *)mono_string_chars(p_mono_string);
+	CharType *dst = &(ret.operator[](0));
+
+	for (int i = 0; i < len; i++) {
+		dst[i] = src[i];
+	}
+
+	return ret;
+}
+
+MonoObject *variant_to_mono_object(const Variant *p_var) {
+	ManagedType type;
+
+	type.type_encoding = MONO_TYPE_OBJECT;
+
+	return variant_to_mono_object(p_var, type);
+}
+
+MonoObject *variant_to_mono_object(const Variant *p_var, const ManagedType &p_type) {
+	switch (p_type.type_encoding) {
+		case MONO_TYPE_BOOLEAN: {
+			MonoBoolean val = p_var->operator bool();
+			return BOX_BOOLEAN(val);
+		}
+
+		case MONO_TYPE_I1: {
+			char val = p_var->operator signed char();
+			return BOX_INT8(val);
+		}
+		case MONO_TYPE_I2: {
+			short val = p_var->operator signed short();
+			return BOX_INT16(val);
+		}
+		case MONO_TYPE_I4: {
+			int val = p_var->operator signed int();
+			return BOX_INT32(val);
+		}
+		case MONO_TYPE_I8: {
+			int64_t val = p_var->operator int64_t();
+			return BOX_INT64(val);
+		}
+
+		case MONO_TYPE_U1: {
+			char val = p_var->operator unsigned char();
+			return BOX_UINT8(val);
+		}
+		case MONO_TYPE_U2: {
+			short val = p_var->operator unsigned short();
+			return BOX_UINT16(val);
+		}
+		case MONO_TYPE_U4: {
+			int val = p_var->operator unsigned int();
+			return BOX_UINT32(val);
+		}
+		case MONO_TYPE_U8: {
+			uint64_t val = p_var->operator uint64_t();
+			return BOX_UINT64(val);
+		}
+
+		case MONO_TYPE_R4: {
+			float val = p_var->operator float();
+			return BOX_FLOAT(val);
+		}
+		case MONO_TYPE_R8: {
+			double val = p_var->operator double();
+			return BOX_DOUBLE(val);
+		}
+
+		case MONO_TYPE_STRING: {
+			return (MonoObject *)mono_string_from_godot(p_var->operator String());
+		} break;
+
+		case MONO_TYPE_VALUETYPE: {
+			GDMonoClass *tclass = p_type.type_class;
+
+			if (tclass == CACHED_CLASS(Vector2))
+				RETURN_BOXED_STRUCT(Vector2, p_var);
+
+			if (tclass == CACHED_CLASS(Rect2))
+				RETURN_BOXED_STRUCT(Rect2, p_var);
+
+			if (tclass == CACHED_CLASS(Transform2D))
+				RETURN_BOXED_STRUCT(Transform2D, p_var);
+
+			if (tclass == CACHED_CLASS(Vector3))
+				RETURN_BOXED_STRUCT(Vector3, p_var);
+
+			if (tclass == CACHED_CLASS(Basis))
+				RETURN_BOXED_STRUCT(Basis, p_var);
+
+			if (tclass == CACHED_CLASS(Quat))
+				RETURN_BOXED_STRUCT(Quat, p_var);
+
+			if (tclass == CACHED_CLASS(Transform))
+				RETURN_BOXED_STRUCT(Transform, p_var);
+
+			if (tclass == CACHED_CLASS(Rect3))
+				RETURN_BOXED_STRUCT(Rect3, p_var);
+
+			if (tclass == CACHED_CLASS(Color))
+				RETURN_BOXED_STRUCT(Color, p_var);
+
+			if (tclass == CACHED_CLASS(Plane))
+				RETURN_BOXED_STRUCT(Plane, p_var);
+		} break;
+
+		case MONO_TYPE_ARRAY:
+		case MONO_TYPE_SZARRAY: {
+			MonoArrayType *array_type = mono_type_get_array_type(GDMonoClass::get_raw_type(p_type.type_class));
+
+			if (array_type->eklass == CACHED_CLASS_RAW(MonoObject))
+				return (MonoObject *)Array_to_mono_array(p_var->operator Array());
+
+			if (array_type->eklass == CACHED_CLASS_RAW(uint8_t))
+				return (MonoObject *)PoolByteArray_to_mono_array(p_var->operator PoolByteArray());
+
+			if (array_type->eklass == CACHED_CLASS_RAW(int32_t))
+				return (MonoObject *)PoolIntArray_to_mono_array(p_var->operator PoolIntArray());
+
+			if (array_type->eklass == REAL_T_MONOCLASS)
+				return (MonoObject *)PoolRealArray_to_mono_array(p_var->operator PoolRealArray());
+
+			if (array_type->eklass == CACHED_CLASS_RAW(String))
+				return (MonoObject *)PoolStringArray_to_mono_array(p_var->operator PoolStringArray());
+
+			if (array_type->eklass == CACHED_CLASS_RAW(Vector2))
+				return (MonoObject *)PoolVector2Array_to_mono_array(p_var->operator PoolVector2Array());
+
+			if (array_type->eklass == CACHED_CLASS_RAW(Vector3))
+				return (MonoObject *)PoolVector3Array_to_mono_array(p_var->operator PoolVector3Array());
+
+			if (array_type->eklass == CACHED_CLASS_RAW(Color))
+				return (MonoObject *)PoolColorArray_to_mono_array(p_var->operator PoolColorArray());
+
+			ERR_EXPLAIN(String() + "Attempted to convert Variant to a managed array of unmarshallable element type.");
+			ERR_FAIL_V(NULL);
+		} break;
+
+		case MONO_TYPE_CLASS: {
+			GDMonoClass *type_class = p_type.type_class;
+
+			// GodotObject
+			if (CACHED_CLASS(GodotObject)->is_assignable_from(type_class)) {
+				return GDMonoUtils::unmanaged_get_managed(p_var->operator Object *());
+			}
+
+			if (CACHED_CLASS(NodePath) == type_class) {
+				return GDMonoUtils::create_managed_from(p_var->operator NodePath());
+			}
+
+			if (CACHED_CLASS(RID) == type_class) {
+				return GDMonoUtils::create_managed_from(p_var->operator RID());
+			}
+		} break;
+		case MONO_TYPE_OBJECT: {
+			// Variant
+			switch (p_var->get_type()) {
+				case Variant::BOOL: {
+					MonoBoolean val = p_var->operator bool();
+					return BOX_BOOLEAN(val);
+				}
+				case Variant::INT: {
+					int val = p_var->operator signed int();
+					return BOX_INT32(val);
+				}
+				case Variant::REAL: {
+#ifdef REAL_T_IS_DOUBLE
+					double val = p_var->operator double();
+					return BOX_DOUBLE(val);
+#else
+					float val = p_var->operator float();
+					return BOX_FLOAT(val);
+#endif
+				}
+				case Variant::STRING:
+					return (MonoObject *)mono_string_from_godot(p_var->operator String());
+				case Variant::VECTOR2:
+					RETURN_BOXED_STRUCT(Vector2, p_var);
+				case Variant::RECT2:
+					RETURN_BOXED_STRUCT(Rect2, p_var);
+				case Variant::VECTOR3:
+					RETURN_BOXED_STRUCT(Vector3, p_var);
+				case Variant::TRANSFORM2D:
+					RETURN_BOXED_STRUCT(Transform2D, p_var);
+				case Variant::PLANE:
+					RETURN_BOXED_STRUCT(Plane, p_var);
+				case Variant::QUAT:
+					RETURN_BOXED_STRUCT(Quat, p_var);
+				case Variant::RECT3:
+					RETURN_BOXED_STRUCT(Rect3, p_var);
+				case Variant::BASIS:
+					RETURN_BOXED_STRUCT(Basis, p_var);
+				case Variant::TRANSFORM:
+					RETURN_BOXED_STRUCT(Transform, p_var);
+				case Variant::COLOR:
+					RETURN_BOXED_STRUCT(Color, p_var);
+				case Variant::NODE_PATH:
+					return GDMonoUtils::create_managed_from(p_var->operator NodePath());
+				case Variant::_RID:
+					return GDMonoUtils::create_managed_from(p_var->operator RID());
+				case Variant::OBJECT: {
+					return GDMonoUtils::unmanaged_get_managed(p_var->operator Object *());
+				}
+				case Variant::DICTIONARY:
+					return Dictionary_to_mono_object(p_var->operator Dictionary());
+				case Variant::ARRAY:
+					return (MonoObject *)Array_to_mono_array(p_var->operator Array());
+				case Variant::POOL_BYTE_ARRAY:
+					return (MonoObject *)PoolByteArray_to_mono_array(p_var->operator PoolByteArray());
+				case Variant::POOL_INT_ARRAY:
+					return (MonoObject *)PoolIntArray_to_mono_array(p_var->operator PoolIntArray());
+				case Variant::POOL_REAL_ARRAY:
+					return (MonoObject *)PoolRealArray_to_mono_array(p_var->operator PoolRealArray());
+				case Variant::POOL_STRING_ARRAY:
+					return (MonoObject *)PoolStringArray_to_mono_array(p_var->operator PoolStringArray());
+				case Variant::POOL_VECTOR2_ARRAY:
+					return (MonoObject *)PoolVector2Array_to_mono_array(p_var->operator PoolVector2Array());
+				case Variant::POOL_VECTOR3_ARRAY:
+					return (MonoObject *)PoolVector3Array_to_mono_array(p_var->operator PoolVector3Array());
+				case Variant::POOL_COLOR_ARRAY:
+					return (MonoObject *)PoolColorArray_to_mono_array(p_var->operator PoolColorArray());
+				default:
+					return NULL;
+			}
+			break;
+			case MONO_TYPE_GENERICINST: {
+				if (CACHED_RAW_MONO_CLASS(Dictionary) == p_type.type_class->get_raw()) {
+					return Dictionary_to_mono_object(p_var->operator Dictionary());
+				}
+			} break;
+		} break;
+	}
+
+	ERR_EXPLAIN(String() + "Attempted to convert Variant to an unmarshallable managed type. Name: \'" +
+				p_type.type_class->get_name() + "\' Encoding: " + itos(p_type.type_encoding));
+	ERR_FAIL_V(NULL);
+}
+
+Variant mono_object_to_variant(MonoObject *p_obj) {
+	if (!p_obj)
+		return Variant();
+
+	GDMonoClass *tclass = GDMono::get_singleton()->get_class(mono_object_get_class(p_obj));
+	ERR_FAIL_COND_V(!tclass, Variant());
+
+	MonoType *raw_type = tclass->get_raw_type(tclass);
+
+	ManagedType type;
+
+	type.type_encoding = mono_type_get_type(raw_type);
+	type.type_class = tclass;
+
+	return mono_object_to_variant(p_obj, type);
+}
+
+Variant mono_object_to_variant(MonoObject *p_obj, const ManagedType &p_type) {
+	switch (p_type.type_encoding) {
+		case MONO_TYPE_BOOLEAN:
+			return (bool)UNBOX_BOOLEAN(p_obj);
+
+		case MONO_TYPE_I1:
+			return UNBOX_INT8(p_obj);
+		case MONO_TYPE_I2:
+			return UNBOX_INT16(p_obj);
+		case MONO_TYPE_I4:
+			return UNBOX_INT32(p_obj);
+		case MONO_TYPE_I8:
+			return UNBOX_INT64(p_obj);
+
+		case MONO_TYPE_U1:
+			return UNBOX_UINT8(p_obj);
+		case MONO_TYPE_U2:
+			return UNBOX_UINT16(p_obj);
+		case MONO_TYPE_U4:
+			return UNBOX_UINT32(p_obj);
+		case MONO_TYPE_U8:
+			return UNBOX_UINT64(p_obj);
+
+		case MONO_TYPE_R4:
+			return UNBOX_FLOAT(p_obj);
+		case MONO_TYPE_R8:
+			return UNBOX_DOUBLE(p_obj);
+
+		case MONO_TYPE_STRING: {
+			String str = mono_string_to_godot((MonoString *)p_obj);
+			return str;
+		} break;
+
+		case MONO_TYPE_VALUETYPE: {
+			GDMonoClass *tclass = p_type.type_class;
+
+			if (tclass == CACHED_CLASS(Vector2))
+				RETURN_UNBOXED_STRUCT(Vector2, p_obj);
+
+			if (tclass == CACHED_CLASS(Rect2))
+				RETURN_UNBOXED_STRUCT(Rect2, p_obj);
+
+			if (tclass == CACHED_CLASS(Transform2D))
+				RETURN_UNBOXED_STRUCT(Transform2D, p_obj);
+
+			if (tclass == CACHED_CLASS(Vector3))
+				RETURN_UNBOXED_STRUCT(Vector3, p_obj);
+
+			if (tclass == CACHED_CLASS(Basis))
+				RETURN_UNBOXED_STRUCT(Basis, p_obj);
+
+			if (tclass == CACHED_CLASS(Quat))
+				RETURN_UNBOXED_STRUCT(Quat, p_obj);
+
+			if (tclass == CACHED_CLASS(Transform))
+				RETURN_UNBOXED_STRUCT(Transform, p_obj);
+
+			if (tclass == CACHED_CLASS(Rect3))
+				RETURN_UNBOXED_STRUCT(Rect3, p_obj);
+
+			if (tclass == CACHED_CLASS(Color))
+				RETURN_UNBOXED_STRUCT(Color, p_obj);
+
+			if (tclass == CACHED_CLASS(Plane))
+				RETURN_UNBOXED_STRUCT(Plane, p_obj);
+		} break;
+
+		case MONO_TYPE_ARRAY:
+		case MONO_TYPE_SZARRAY: {
+			MonoArrayType *array_type = mono_type_get_array_type(GDMonoClass::get_raw_type(p_type.type_class));
+
+			if (array_type->eklass == CACHED_CLASS_RAW(MonoObject))
+				return mono_array_to_Array((MonoArray *)p_obj);
+
+			if (array_type->eklass == CACHED_CLASS_RAW(uint8_t))
+				return mono_array_to_PoolByteArray((MonoArray *)p_obj);
+
+			if (array_type->eklass == CACHED_CLASS_RAW(int32_t))
+				return mono_array_to_PoolIntArray((MonoArray *)p_obj);
+
+			if (array_type->eklass == REAL_T_MONOCLASS)
+				return mono_array_to_PoolRealArray((MonoArray *)p_obj);
+
+			if (array_type->eklass == CACHED_CLASS_RAW(String))
+				return mono_array_to_PoolStringArray((MonoArray *)p_obj);
+
+			if (array_type->eklass == CACHED_CLASS_RAW(Vector2))
+				return mono_array_to_PoolVector2Array((MonoArray *)p_obj);
+
+			if (array_type->eklass == CACHED_CLASS_RAW(Vector3))
+				return mono_array_to_PoolVector3Array((MonoArray *)p_obj);
+
+			if (array_type->eklass == CACHED_CLASS_RAW(Color))
+				return mono_array_to_PoolColorArray((MonoArray *)p_obj);
+
+			ERR_EXPLAIN(String() + "Attempted to convert a managed array of unmarshallable element type to Variant.");
+			ERR_FAIL_V(Variant());
+		} break;
+
+		case MONO_TYPE_CLASS: {
+			GDMonoClass *type_class = p_type.type_class;
+
+			// GodotObject
+			if (CACHED_CLASS(GodotObject)->is_assignable_from(type_class)) {
+				GDMonoField *ptr_field = CACHED_FIELD(GodotObject, ptr);
+
+				ERR_FAIL_NULL_V(ptr_field, Variant());
+
+				void *ptr_to_unmanaged = UNBOX_PTR(ptr_field->get_value(p_obj));
+
+				if (!ptr_to_unmanaged) // IntPtr.Zero
+					return Variant();
+
+				Object *object_ptr = static_cast<Object *>(ptr_to_unmanaged);
+
+				if (!object_ptr)
+					return Variant();
+
+				return object_ptr;
+			}
+
+			if (CACHED_CLASS(NodePath) == type_class) {
+				return UNBOX_PTR(CACHED_FIELD(NodePath, ptr)->get_value(p_obj));
+			}
+
+			if (CACHED_CLASS(RID) == type_class) {
+				return UNBOX_PTR(CACHED_FIELD(RID, ptr)->get_value(p_obj));
+			}
+		} break;
+
+		case MONO_TYPE_GENERICINST: {
+			if (CACHED_RAW_MONO_CLASS(Dictionary) == p_type.type_class->get_raw()) {
+				return mono_object_to_Dictionary(p_obj);
+			}
+		} break;
+	}
+
+	ERR_EXPLAIN(String() + "Attempted to convert an unmarshallable managed type to Variant. Name: \'" +
+				p_type.type_class->get_name() + "\' Encoding: " + itos(p_type.type_encoding));
+	ERR_FAIL_V(Variant());
+}
+
+MonoArray *Array_to_mono_array(const Array &p_array) {
+	MonoArray *ret = mono_array_new(mono_domain_get(), CACHED_CLASS_RAW(MonoObject), p_array.size());
+
+	for (int i = 0; i < p_array.size(); i++) {
+		MonoObject *boxed = variant_to_mono_object(p_array[i]);
+		mono_array_set(ret, MonoObject *, i, boxed);
+	}
+
+	return ret;
+}
+
+Array mono_array_to_Array(MonoArray *p_array) {
+	Array ret;
+	int length = mono_array_length(p_array);
+
+	for (int i = 0; i < length; i++) {
+		MonoObject *elem = mono_array_get(p_array, MonoObject *, i);
+		ret.push_back(mono_object_to_variant(elem));
+	}
+
+	return ret;
+}
+
+// TODO Optimize reading/writing from/to PoolArrays
+
+MonoArray *PoolIntArray_to_mono_array(const PoolIntArray &p_array) {
+	MonoArray *ret = mono_array_new(mono_domain_get(), CACHED_CLASS_RAW(int32_t), p_array.size());
+
+	for (int i = 0; i < p_array.size(); i++) {
+		mono_array_set(ret, int32_t, i, p_array[i]);
+	}
+
+	return ret;
+}
+
+PoolIntArray mono_array_to_PoolIntArray(MonoArray *p_array) {
+	PoolIntArray ret;
+	int length = mono_array_length(p_array);
+
+	for (int i = 0; i < length; i++) {
+		int32_t elem = mono_array_get(p_array, int32_t, i);
+		ret.push_back(elem);
+	}
+
+	return ret;
+}
+
+MonoArray *PoolByteArray_to_mono_array(const PoolByteArray &p_array) {
+	MonoArray *ret = mono_array_new(mono_domain_get(), CACHED_CLASS_RAW(uint8_t), p_array.size());
+
+	for (int i = 0; i < p_array.size(); i++) {
+		mono_array_set(ret, uint8_t, i, p_array[i]);
+	}
+
+	return ret;
+}
+
+PoolByteArray mono_array_to_PoolByteArray(MonoArray *p_array) {
+	PoolByteArray ret;
+	int length = mono_array_length(p_array);
+
+	for (int i = 0; i < length; i++) {
+		uint8_t elem = mono_array_get(p_array, uint8_t, i);
+		ret.push_back(elem);
+	}
+
+	return ret;
+}
+
+MonoArray *PoolRealArray_to_mono_array(const PoolRealArray &p_array) {
+	MonoArray *ret = mono_array_new(mono_domain_get(), REAL_T_MONOCLASS, p_array.size());
+
+	for (int i = 0; i < p_array.size(); i++) {
+		mono_array_set(ret, real_t, i, p_array[i]);
+	}
+
+	return ret;
+}
+
+PoolRealArray mono_array_to_PoolRealArray(MonoArray *p_array) {
+	PoolRealArray ret;
+	int length = mono_array_length(p_array);
+
+	for (int i = 0; i < length; i++) {
+		real_t elem = mono_array_get(p_array, real_t, i);
+		ret.push_back(elem);
+	}
+
+	return ret;
+}
+
+MonoArray *PoolStringArray_to_mono_array(const PoolStringArray &p_array) {
+	MonoArray *ret = mono_array_new(mono_domain_get(), CACHED_CLASS_RAW(String), p_array.size());
+
+	for (int i = 0; i < p_array.size(); i++) {
+		MonoString *boxed = mono_string_from_godot(p_array[i]);
+		mono_array_set(ret, MonoString *, i, boxed);
+	}
+
+	return ret;
+}
+
+PoolStringArray mono_array_to_PoolStringArray(MonoArray *p_array) {
+	PoolStringArray ret;
+	int length = mono_array_length(p_array);
+
+	for (int i = 0; i < length; i++) {
+		MonoString *elem = mono_array_get(p_array, MonoString *, i);
+		ret.push_back(mono_string_to_godot(elem));
+	}
+
+	return ret;
+}
+
+MonoArray *PoolColorArray_to_mono_array(const PoolColorArray &p_array) {
+	MonoArray *ret = mono_array_new(mono_domain_get(), CACHED_CLASS_RAW(Color), p_array.size());
+
+	for (int i = 0; i < p_array.size(); i++) {
+#ifdef YOLOCOPY
+		mono_array_set(ret, Color, i, p_array[i]);
+#else
+		real_t *raw = (real_t *)mono_array_addr_with_size(ret, sizeof(real_t) * 4, i);
+		const Color &elem = p_array[i];
+		raw[0] = elem.r;
+		raw[4] = elem.g;
+		raw[8] = elem.b;
+		raw[12] = elem.a;
+#endif
+	}
+
+	return ret;
+}
+
+PoolColorArray mono_array_to_PoolColorArray(MonoArray *p_array) {
+	PoolColorArray ret;
+	int length = mono_array_length(p_array);
+
+	for (int i = 0; i < length; i++) {
+		real_t *raw_elem = mono_array_get(p_array, real_t *, i);
+		MARSHALLED_IN(Color, raw_elem, elem);
+		ret.push_back(elem);
+	}
+
+	return ret;
+}
+
+MonoArray *PoolVector2Array_to_mono_array(const PoolVector2Array &p_array) {
+	MonoArray *ret = mono_array_new(mono_domain_get(), CACHED_CLASS_RAW(Vector2), p_array.size());
+
+	for (int i = 0; i < p_array.size(); i++) {
+#ifdef YOLOCOPY
+		mono_array_set(ret, Vector2, i, p_array[i]);
+#else
+		real_t *raw = (real_t *)mono_array_addr_with_size(ret, sizeof(real_t) * 2, i);
+		const Vector2 &elem = p_array[i];
+		raw[0] = elem.x;
+		raw[4] = elem.y;
+#endif
+	}
+
+	return ret;
+}
+
+PoolVector2Array mono_array_to_PoolVector2Array(MonoArray *p_array) {
+	PoolVector2Array ret;
+	int length = mono_array_length(p_array);
+
+	for (int i = 0; i < length; i++) {
+		real_t *raw_elem = mono_array_get(p_array, real_t *, i);
+		MARSHALLED_IN(Vector2, raw_elem, elem);
+		ret.push_back(elem);
+	}
+
+	return ret;
+}
+
+MonoArray *PoolVector3Array_to_mono_array(const PoolVector3Array &p_array) {
+	MonoArray *ret = mono_array_new(mono_domain_get(), CACHED_CLASS_RAW(Vector3), p_array.size());
+
+	for (int i = 0; i < p_array.size(); i++) {
+#ifdef YOLOCOPY
+		mono_array_set(ret, Vector3, i, p_array[i]);
+#else
+		real_t *raw = (real_t *)mono_array_addr_with_size(ret, sizeof(real_t) * 3, i);
+		const Vector3 &elem = p_array[i];
+		raw[0] = elem.x;
+		raw[4] = elem.y;
+		raw[8] = elem.z;
+#endif
+	}
+
+	return ret;
+}
+
+PoolVector3Array mono_array_to_PoolVector3Array(MonoArray *p_array) {
+	PoolVector3Array ret;
+	int length = mono_array_length(p_array);
+
+	for (int i = 0; i < length; i++) {
+		real_t *raw_elem = mono_array_get(p_array, real_t *, i);
+		MARSHALLED_IN(Vector3, raw_elem, elem);
+		ret.push_back(elem);
+	}
+
+	return ret;
+}
+
+MonoObject *Dictionary_to_mono_object(const Dictionary &p_dict) {
+	MonoArray *keys = mono_array_new(mono_domain_get(), CACHED_CLASS_RAW(MonoObject), p_dict.size());
+	MonoArray *values = mono_array_new(mono_domain_get(), CACHED_CLASS_RAW(MonoObject), p_dict.size());
+
+	int i = 0;
+	const Variant *dkey = NULL;
+	while ((dkey = p_dict.next(dkey))) {
+		mono_array_set(keys, MonoObject *, i, variant_to_mono_object(dkey));
+		mono_array_set(values, MonoObject *, i, variant_to_mono_object(p_dict[*dkey]));
+		i++;
+	}
+
+	GDMonoUtils::MarshalUtils_ArraysToDict arrays_to_dict = CACHED_METHOD_THUNK(MarshalUtils, ArraysToDictionary);
+
+	MonoObject *ex = NULL;
+	MonoObject *ret = arrays_to_dict(keys, values, &ex);
+
+	if (ex) {
+		mono_print_unhandled_exception(ex);
+		ERR_FAIL_V(NULL);
+	}
+
+	return ret;
+}
+
+Dictionary mono_object_to_Dictionary(MonoObject *p_dict) {
+	Dictionary ret;
+
+	GDMonoUtils::MarshalUtils_DictToArrays dict_to_arrays = CACHED_METHOD_THUNK(MarshalUtils, DictionaryToArrays);
+
+	MonoArray *keys = NULL;
+	MonoArray *values = NULL;
+	MonoObject *ex = NULL;
+	dict_to_arrays(p_dict, &keys, &values, &ex);
+
+	if (ex) {
+		mono_print_unhandled_exception(ex);
+		ERR_FAIL_V(Dictionary());
+	}
+
+	int length = mono_array_length(keys);
+
+	for (int i = 0; i < length; i++) {
+		MonoObject *key_obj = mono_array_get(keys, MonoObject *, i);
+		MonoObject *value_obj = mono_array_get(values, MonoObject *, i);
+
+		Variant key = key_obj ? mono_object_to_variant(key_obj) : Variant();
+		Variant value = value_obj ? mono_object_to_variant(value_obj) : Variant();
+
+		ret[key] = value;
+	}
+
+	return ret;
+}
+}
diff --git a/modules/mono/mono_gd/gd_mono_marshal.h b/modules/mono/mono_gd/gd_mono_marshal.h
new file mode 100644
index 00000000000..5fbafa0acb5
--- /dev/null
+++ b/modules/mono/mono_gd/gd_mono_marshal.h
@@ -0,0 +1,229 @@
+/*************************************************************************/
+/*  gd_mono_marshal.h                                                    */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2017 Godot Engine contributors (cf. AUTHORS.md)    */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+#ifndef GDMONOMARSHAL_H
+#define GDMONOMARSHAL_H
+
+#include "gd_mono.h"
+#include "gd_mono_utils.h"
+#include "variant.h"
+
+namespace GDMonoMarshal {
+
+#define UNBOX_CHAR_PTR(x) (char *)mono_object_unbox(x)
+#define UNBOX_FLOAT_PTR(x) (float *)mono_object_unbox(x)
+
+#define UNBOX_DOUBLE(x) *(double *)mono_object_unbox(x)
+#define UNBOX_FLOAT(x) *(float *)mono_object_unbox(x)
+#define UNBOX_INT64(x) *(int64_t *)mono_object_unbox(x)
+#define UNBOX_INT32(x) *(int32_t *)mono_object_unbox(x)
+#define UNBOX_INT16(x) *(int16_t *)mono_object_unbox(x)
+#define UNBOX_INT8(x) *(int8_t *)mono_object_unbox(x)
+#define UNBOX_UINT64(x) *(uint64_t *)mono_object_unbox(x)
+#define UNBOX_UINT32(x) *(uint32_t *)mono_object_unbox(x)
+#define UNBOX_UINT16(x) *(uint16_t *)mono_object_unbox(x)
+#define UNBOX_UINT8(x) *(uint8_t *)mono_object_unbox(x)
+#define UNBOX_BOOLEAN(x) *(MonoBoolean *)mono_object_unbox(x)
+#define UNBOX_PTR(x) mono_object_unbox(x)
+
+#define BOX_DOUBLE(x) mono_value_box(mono_domain_get(), CACHED_CLASS_RAW(double), &x)
+#define BOX_FLOAT(x) mono_value_box(mono_domain_get(), CACHED_CLASS_RAW(float), &x)
+#define BOX_INT64(x) mono_value_box(mono_domain_get(), CACHED_CLASS_RAW(int64_t), &x)
+#define BOX_INT32(x) mono_value_box(mono_domain_get(), CACHED_CLASS_RAW(int32_t), &x)
+#define BOX_INT16(x) mono_value_box(mono_domain_get(), CACHED_CLASS_RAW(int16_t), &x)
+#define BOX_INT8(x) mono_value_box(mono_domain_get(), CACHED_CLASS_RAW(int8_t), &x)
+#define BOX_UINT64(x) mono_value_box(mono_domain_get(), CACHED_CLASS_RAW(uint64_t), &x)
+#define BOX_UINT32(x) mono_value_box(mono_domain_get(), CACHED_CLASS_RAW(uint32_t), &x)
+#define BOX_UINT16(x) mono_value_box(mono_domain_get(), CACHED_CLASS_RAW(uint16_t), &x)
+#define BOX_UINT8(x) mono_value_box(mono_domain_get(), CACHED_CLASS_RAW(uint8_t), &x)
+#define BOX_BOOLEAN(x) mono_value_box(mono_domain_get(), CACHED_CLASS_RAW(bool), &x)
+#define BOX_PTR(x) mono_value_box(mono_domain_get(), CACHED_CLASS_RAW(IntPtr), x)
+
+Variant::Type managed_to_variant_type(const ManagedType &p_type);
+
+// String
+
+String mono_to_utf8_string(MonoString *p_mono_string);
+String mono_to_utf16_string(MonoString *p_mono_string);
+
+_FORCE_INLINE_ String mono_string_to_godot(MonoString *p_mono_string) {
+	if (sizeof(CharType) == 2)
+		return mono_to_utf16_string(p_mono_string);
+
+	return mono_to_utf8_string(p_mono_string);
+}
+
+_FORCE_INLINE_ MonoString *mono_from_utf8_string(const String &p_string) {
+	return mono_string_new(mono_domain_get(), p_string.utf8().get_data());
+}
+
+_FORCE_INLINE_ MonoString *mono_from_utf16_string(const String &p_string) {
+	return mono_string_from_utf16((mono_unichar2 *)p_string.c_str());
+}
+
+_FORCE_INLINE_ MonoString *mono_string_from_godot(const String &p_string) {
+	if (sizeof(CharType) == 2)
+		return mono_from_utf16_string(p_string);
+
+	return mono_from_utf8_string(p_string);
+}
+
+// Variant
+
+MonoObject *variant_to_mono_object(const Variant *p_var, const ManagedType &p_type);
+MonoObject *variant_to_mono_object(const Variant *p_var);
+
+_FORCE_INLINE_ MonoObject *variant_to_mono_object(Variant p_var) {
+	return variant_to_mono_object(&p_var);
+}
+
+Variant mono_object_to_variant(MonoObject *p_obj);
+Variant mono_object_to_variant(MonoObject *p_obj, const ManagedType &p_type);
+
+// Array
+
+MonoArray *Array_to_mono_array(const Array &p_array);
+Array mono_array_to_Array(MonoArray *p_array);
+
+// PoolIntArray
+
+MonoArray *PoolIntArray_to_mono_array(const PoolIntArray &p_array);
+PoolIntArray mono_array_to_PoolIntArray(MonoArray *p_array);
+
+// PoolByteArray
+
+MonoArray *PoolByteArray_to_mono_array(const PoolByteArray &p_array);
+PoolByteArray mono_array_to_PoolByteArray(MonoArray *p_array);
+
+// PoolRealArray
+
+MonoArray *PoolRealArray_to_mono_array(const PoolRealArray &p_array);
+PoolRealArray mono_array_to_PoolRealArray(MonoArray *p_array);
+
+// PoolStringArray
+
+MonoArray *PoolStringArray_to_mono_array(const PoolStringArray &p_array);
+PoolStringArray mono_array_to_PoolStringArray(MonoArray *p_array);
+
+// PoolColorArray
+
+MonoArray *PoolColorArray_to_mono_array(const PoolColorArray &p_array);
+PoolColorArray mono_array_to_PoolColorArray(MonoArray *p_array);
+
+// PoolVector2Array
+
+MonoArray *PoolVector2Array_to_mono_array(const PoolVector2Array &p_array);
+PoolVector2Array mono_array_to_PoolVector2Array(MonoArray *p_array);
+
+// PoolVector3Array
+
+MonoArray *PoolVector3Array_to_mono_array(const PoolVector3Array &p_array);
+PoolVector3Array mono_array_to_PoolVector3Array(MonoArray *p_array);
+
+// Dictionary
+
+MonoObject *Dictionary_to_mono_object(const Dictionary &p_dict);
+Dictionary mono_object_to_Dictionary(MonoObject *p_dict);
+
+#ifdef YOLO_COPY
+#define MARSHALLED_OUT(m_t, m_in, m_out) m_t *m_out = (m_t *)&m_in;
+#define MARSHALLED_IN(m_t, m_in, m_out) m_t m_out = *reinterpret_cast<m_t *>(m_in);
+#else
+
+// Expects m_in to be of type float*
+
+#define MARSHALLED_OUT(m_t, m_in, m_out) MARSHALLED_OUT_##m_t(m_in, m_out)
+#define MARSHALLED_IN(m_t, m_in, m_out) MARSHALLED_IN_##m_t(m_in, m_out)
+
+// Vector2
+
+#define MARSHALLED_OUT_Vector2(m_in, m_out) real_t m_out[2] = { m_in.x, m_in.y };
+#define MARSHALLED_IN_Vector2(m_in, m_out) Vector2 m_out(m_in[0], m_in[1]);
+
+// Rect2
+
+#define MARSHALLED_OUT_Rect2(m_in, m_out) real_t m_out[4] = { m_in.position.x, m_in.position.y, m_in.size.width, m_in.size.height };
+#define MARSHALLED_IN_Rect2(m_in, m_out) Rect2 m_out(m_in[0], m_in[1], m_in[2], m_in[3]);
+
+// Transform2D
+
+#define MARSHALLED_OUT_Transform2D(m_in, m_out) real_t m_out[6] = { m_in[0].x, m_in[0].y, m_in[1].x, m_in[1].y, m_in[2].x, m_in[2].y };
+#define MARSHALLED_IN_Transform2D(m_in, m_out) Transform2D m_out(m_in[0], m_in[1], m_in[2], m_in[3], m_in[4], m_in[5]);
+
+// Vector3
+
+#define MARSHALLED_OUT_Vector3(m_in, m_out) real_t m_out[3] = { m_in.x, m_in.y, m_in.z };
+#define MARSHALLED_IN_Vector3(m_in, m_out) Vector3 m_out(m_in[0], m_in[1], m_in[2]);
+
+// Basis
+
+#define MARSHALLED_OUT_Basis(m_in, m_out) real_t m_out[9] = { \
+	m_in[0].x, m_in[0].y, m_in[0].z,                          \
+	m_in[1].x, m_in[1].y, m_in[1].z,                          \
+	m_in[2].x, m_in[2].y, m_in[2].z                           \
+};
+#define MARSHALLED_IN_Basis(m_in, m_out) Basis m_out(m_in[0], m_in[1], m_in[2], m_in[3], m_in[4], m_in[5], m_in[6], m_in[7], m_in[8]);
+
+// Quat
+
+#define MARSHALLED_OUT_Quat(m_in, m_out) real_t m_out[4] = { m_in.x, m_in.y, m_in.z, m_in.w };
+#define MARSHALLED_IN_Quat(m_in, m_out) Quat m_out(m_in[0], m_in[1], m_in[2], m_in[3]);
+
+// Transform
+
+#define MARSHALLED_OUT_Transform(m_in, m_out) real_t m_out[12] = { \
+	m_in.basis[0].x, m_in.basis[0].y, m_in.basis[0].z,             \
+	m_in.basis[1].x, m_in.basis[1].y, m_in.basis[1].z,             \
+	m_in.basis[2].x, m_in.basis[2].y, m_in.basis[2].z,             \
+	m_in.origin.x, m_in.origin.y, m_in.origin.z                    \
+};
+#define MARSHALLED_IN_Transform(m_in, m_out) Transform m_out(                                   \
+		Basis(m_in[0], m_in[1], m_in[2], m_in[3], m_in[4], m_in[5], m_in[6], m_in[7], m_in[8]), \
+		Vector3(m_in[9], m_in[10], m_in[11]));
+
+// Rect3
+
+#define MARSHALLED_OUT_Rect3(m_in, m_out) real_t m_out[6] = { m_in.position.x, m_in.position.y, m_in.position.z, m_in.size.x, m_in.size.y, m_in.size.z };
+#define MARSHALLED_IN_Rect3(m_in, m_out) Rect3 m_out(Vector3(m_in[0], m_in[1], m_in[2]), Vector3(m_in[3], m_in[4], m_in[5]));
+
+// Color
+
+#define MARSHALLED_OUT_Color(m_in, m_out) real_t m_out[4] = { m_in.r, m_in.g, m_in.b, m_in.a };
+#define MARSHALLED_IN_Color(m_in, m_out) Color m_out(m_in[0], m_in[1], m_in[2], m_in[3]);
+
+// Plane
+
+#define MARSHALLED_OUT_Plane(m_in, m_out) real_t m_out[4] = { m_in.normal.x, m_in.normal.y, m_in.normal.z, m_in.d };
+#define MARSHALLED_IN_Plane(m_in, m_out) Plane m_out(m_in[0], m_in[1], m_in[2], m_in[3]);
+
+#endif
+
+} // GDMonoMarshal
+
+#endif // GDMONOMARSHAL_H
diff --git a/modules/mono/mono_gd/gd_mono_method.cpp b/modules/mono/mono_gd/gd_mono_method.cpp
new file mode 100644
index 00000000000..6468e0d3d9c
--- /dev/null
+++ b/modules/mono/mono_gd/gd_mono_method.cpp
@@ -0,0 +1,192 @@
+/*************************************************************************/
+/*  gd_mono_method.cpp                                                   */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2017 Godot Engine contributors (cf. AUTHORS.md)    */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+#include "gd_mono_method.h"
+
+#include "gd_mono_class.h"
+#include "gd_mono_marshal.h"
+
+void GDMonoMethod::_update_signature() {
+	// Apparently MonoMethodSignature needs not to be freed.
+	// mono_method_signature caches the result, we don't need to cache it ourselves.
+
+	MonoMethodSignature *method_sig = mono_method_signature(mono_method);
+	_update_signature(method_sig);
+}
+
+void GDMonoMethod::_update_signature(MonoMethodSignature *p_method_sig) {
+	is_instance = mono_signature_is_instance(p_method_sig);
+	params_count = mono_signature_get_param_count(p_method_sig);
+
+	MonoType *ret_type = mono_signature_get_return_type(p_method_sig);
+	if (ret_type) {
+		return_type.type_encoding = mono_type_get_type(ret_type);
+
+		if (return_type.type_encoding != MONO_TYPE_VOID) {
+			MonoClass *ret_type_class = mono_class_from_mono_type(ret_type);
+			return_type.type_class = GDMono::get_singleton()->get_class(ret_type_class);
+		}
+	}
+
+	void *iter = NULL;
+	MonoType *param_raw_type;
+	while ((param_raw_type = mono_signature_get_params(p_method_sig, &iter)) != NULL) {
+		ManagedType param_type;
+
+		param_type.type_encoding = mono_type_get_type(param_raw_type);
+
+		if (param_type.type_encoding != MONO_TYPE_VOID) {
+			MonoClass *param_type_class = mono_class_from_mono_type(param_raw_type);
+			param_type.type_class = GDMono::get_singleton()->get_class(param_type_class);
+		}
+
+		param_types.push_back(param_type);
+	}
+}
+
+void *GDMonoMethod::get_thunk() {
+	return mono_method_get_unmanaged_thunk(mono_method);
+}
+
+MonoObject *GDMonoMethod::invoke(MonoObject *p_object, const Variant **p_params, MonoObject **r_exc) {
+	if (get_return_type().type_encoding != MONO_TYPE_VOID || get_parameters_count() > 0) {
+		MonoArray *params = mono_array_new(mono_domain_get(), CACHED_CLASS_RAW(MonoObject), get_parameters_count());
+
+		for (int i = 0; i < params_count; i++) {
+			MonoObject *boxed_param = GDMonoMarshal::variant_to_mono_object(p_params[i], param_types[i]);
+			mono_array_set(params, MonoObject *, i, boxed_param);
+		}
+
+		return mono_runtime_invoke_array(mono_method, p_object, params, r_exc);
+	} else {
+		mono_runtime_invoke(mono_method, p_object, NULL, r_exc);
+		return NULL;
+	}
+}
+
+MonoObject *GDMonoMethod::invoke(MonoObject *p_object, MonoObject **r_exc) {
+	ERR_FAIL_COND_V(get_parameters_count() > 0, NULL);
+	return invoke_raw(p_object, NULL, r_exc);
+}
+
+MonoObject *GDMonoMethod::invoke_raw(MonoObject *p_object, void **p_params, MonoObject **r_exc) {
+	return mono_runtime_invoke(mono_method, p_object, p_params, r_exc);
+}
+
+bool GDMonoMethod::has_attribute(GDMonoClass *p_attr_class) {
+	ERR_FAIL_NULL_V(p_attr_class, false);
+
+	if (!attrs_fetched)
+		fetch_attributes();
+
+	if (!attributes)
+		return false;
+
+	return mono_custom_attrs_has_attr(attributes, p_attr_class->get_raw());
+}
+
+MonoObject *GDMonoMethod::get_attribute(GDMonoClass *p_attr_class) {
+	ERR_FAIL_NULL_V(p_attr_class, NULL);
+
+	if (!attrs_fetched)
+		fetch_attributes();
+
+	if (!attributes)
+		return NULL;
+
+	return mono_custom_attrs_get_attr(attributes, p_attr_class->get_raw());
+}
+
+void GDMonoMethod::fetch_attributes() {
+	ERR_FAIL_COND(attributes != NULL);
+	attributes = mono_custom_attrs_from_method(mono_method);
+	attrs_fetched = true;
+}
+
+String GDMonoMethod::get_full_name(bool p_signature) const {
+	char *res = mono_method_full_name(mono_method, p_signature);
+	String full_name(res);
+	mono_free(res);
+	return full_name;
+}
+
+String GDMonoMethod::get_full_name_no_class() const {
+	String res;
+
+	MonoMethodSignature *method_sig = mono_method_signature(mono_method);
+
+	char *ret_str = mono_type_full_name(mono_signature_get_return_type(method_sig));
+	res += ret_str;
+	mono_free(ret_str);
+
+	res += " ";
+	res += name;
+	res += "(";
+
+	char *sig_desc = mono_signature_get_desc(method_sig, true);
+	res += sig_desc;
+	mono_free(sig_desc);
+
+	res += ")";
+
+	return res;
+}
+
+String GDMonoMethod::get_ret_type_full_name() const {
+	MonoMethodSignature *method_sig = mono_method_signature(mono_method);
+	char *ret_str = mono_type_full_name(mono_signature_get_return_type(method_sig));
+	String res = ret_str;
+	mono_free(ret_str);
+	return res;
+}
+
+String GDMonoMethod::get_signature_desc(bool p_namespaces) const {
+	MonoMethodSignature *method_sig = mono_method_signature(mono_method);
+	char *sig_desc = mono_signature_get_desc(method_sig, p_namespaces);
+	String res = sig_desc;
+	mono_free(sig_desc);
+	return res;
+}
+
+GDMonoMethod::GDMonoMethod(StringName p_name, MonoMethod *p_method) {
+	name = p_name;
+
+	mono_method = p_method;
+
+	attrs_fetched = false;
+	attributes = NULL;
+
+	_update_signature();
+}
+
+GDMonoMethod::~GDMonoMethod() {
+	if (attributes) {
+		mono_custom_attrs_free(attributes);
+	}
+}
diff --git a/modules/mono/mono_gd/gd_mono_method.h b/modules/mono/mono_gd/gd_mono_method.h
new file mode 100644
index 00000000000..ea4bc8e7070
--- /dev/null
+++ b/modules/mono/mono_gd/gd_mono_method.h
@@ -0,0 +1,81 @@
+/*************************************************************************/
+/*  gd_mono_method.h                                                     */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2017 Godot Engine contributors (cf. AUTHORS.md)    */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+#ifndef GD_MONO_METHOD_H
+#define GD_MONO_METHOD_H
+
+#include "gd_mono.h"
+#include "gd_mono_header.h"
+
+class GDMonoMethod {
+
+	StringName name;
+
+	bool is_instance;
+	int params_count;
+	ManagedType return_type;
+	Vector<ManagedType> param_types;
+
+	bool attrs_fetched;
+	MonoCustomAttrInfo *attributes;
+
+	void _update_signature();
+	void _update_signature(MonoMethodSignature *p_method_sig);
+
+	friend class GDMonoClass;
+
+	MonoMethod *mono_method;
+
+public:
+	_FORCE_INLINE_ StringName get_name() { return name; }
+
+	_FORCE_INLINE_ bool is_static() { return !is_instance; }
+	_FORCE_INLINE_ int get_parameters_count() { return params_count; }
+	_FORCE_INLINE_ ManagedType get_return_type() { return return_type; }
+
+	void *get_thunk();
+
+	MonoObject *invoke(MonoObject *p_object, const Variant **p_params, MonoObject **r_exc = NULL);
+	MonoObject *invoke(MonoObject *p_object, MonoObject **r_exc = NULL);
+	MonoObject *invoke_raw(MonoObject *p_object, void **p_params, MonoObject **r_exc = NULL);
+
+	bool has_attribute(GDMonoClass *p_attr_class);
+	MonoObject *get_attribute(GDMonoClass *p_attr_class);
+	void fetch_attributes();
+
+	String get_full_name(bool p_signature = false) const;
+	String get_full_name_no_class() const;
+	String get_ret_type_full_name() const;
+	String get_signature_desc(bool p_namespaces = false) const;
+
+	GDMonoMethod(StringName p_name, MonoMethod *p_method);
+	~GDMonoMethod();
+};
+
+#endif // GD_MONO_METHOD_H
diff --git a/modules/mono/mono_gd/gd_mono_utils.cpp b/modules/mono/mono_gd/gd_mono_utils.cpp
new file mode 100644
index 00000000000..5deca8e64d8
--- /dev/null
+++ b/modules/mono/mono_gd/gd_mono_utils.cpp
@@ -0,0 +1,367 @@
+/*************************************************************************/
+/*  gd_mono_utils.cpp                                                    */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2017 Godot Engine contributors (cf. AUTHORS.md)    */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+#include "gd_mono_utils.h"
+
+#include "os/dir_access.h"
+#include "project_settings.h"
+#include "reference.h"
+
+#include "../csharp_script.h"
+#include "gd_mono.h"
+#include "gd_mono_class.h"
+#include "gd_mono_marshal.h"
+
+namespace GDMonoUtils {
+
+MonoCache mono_cache;
+
+#define CACHE_AND_CHECK(m_var, m_val)                                                        \
+	{                                                                                        \
+		m_var = m_val;                                                                       \
+		if (!m_var) ERR_PRINT("Mono Cache: Member " #m_var " is null. This is really bad!"); \
+	}
+
+#define CACHE_CLASS_AND_CHECK(m_class, m_val) CACHE_AND_CHECK(GDMonoUtils::mono_cache.class_##m_class, m_val)
+#define CACHE_NS_CLASS_AND_CHECK(m_ns, m_class, m_val) CACHE_AND_CHECK(GDMonoUtils::mono_cache.class_##m_ns##_##m_class, m_val)
+#define CACHE_RAW_MONO_CLASS_AND_CHECK(m_class, m_val) CACHE_AND_CHECK(GDMonoUtils::mono_cache.rawclass_##m_class, m_val)
+#define CACHE_FIELD_AND_CHECK(m_class, m_field, m_val) CACHE_AND_CHECK(GDMonoUtils::mono_cache.field_##m_class##_##m_field, m_val)
+#define CACHE_METHOD_THUNK_AND_CHECK(m_class, m_method, m_val) CACHE_AND_CHECK(GDMonoUtils::mono_cache.methodthunk_##m_class##_##m_method, m_val)
+
+void MonoCache::clear_members() {
+
+	class_MonoObject = NULL;
+	class_bool = NULL;
+	class_int8_t = NULL;
+	class_int16_t = NULL;
+	class_int32_t = NULL;
+	class_int64_t = NULL;
+	class_uint8_t = NULL;
+	class_uint16_t = NULL;
+	class_uint32_t = NULL;
+	class_uint64_t = NULL;
+	class_float = NULL;
+	class_double = NULL;
+	class_String = NULL;
+	class_IntPtr = NULL;
+
+	rawclass_Dictionary = NULL;
+
+	class_Vector2 = NULL;
+	class_Rect2 = NULL;
+	class_Transform2D = NULL;
+	class_Vector3 = NULL;
+	class_Basis = NULL;
+	class_Quat = NULL;
+	class_Transform = NULL;
+	class_Rect3 = NULL;
+	class_Color = NULL;
+	class_Plane = NULL;
+	class_NodePath = NULL;
+	class_RID = NULL;
+	class_GodotObject = NULL;
+	class_Node = NULL;
+	class_Control = NULL;
+	class_Spatial = NULL;
+	class_WeakRef = NULL;
+	class_MarshalUtils = NULL;
+
+	class_ExportAttribute = NULL;
+	field_ExportAttribute_hint = NULL;
+	field_ExportAttribute_hint_string = NULL;
+	field_ExportAttribute_usage = NULL;
+	class_ToolAttribute = NULL;
+	class_RemoteAttribute = NULL;
+	class_SyncAttribute = NULL;
+	class_MasterAttribute = NULL;
+	class_SlaveAttribute = NULL;
+	class_GodotMethodAttribute = NULL;
+	field_GodotMethodAttribute_methodName = NULL;
+
+	field_GodotObject_ptr = NULL;
+	field_NodePath_ptr = NULL;
+	field_Image_ptr = NULL;
+	field_RID_ptr = NULL;
+
+	methodthunk_MarshalUtils_DictionaryToArrays = NULL;
+	methodthunk_MarshalUtils_ArraysToDictionary = NULL;
+	methodthunk_GodotObject__AwaitedSignalCallback = NULL;
+	methodthunk_SignalAwaiter_FailureCallback = NULL;
+	methodthunk_GodotTaskScheduler_Activate = NULL;
+
+	task_scheduler_handle = Ref<MonoGCHandle>();
+}
+
+#define GODOT_API_CLASS(m_class) (GDMono::get_singleton()->get_api_assembly()->get_class(BINDINGS_NAMESPACE, #m_class))
+
+void update_corlib_cache() {
+
+	CACHE_CLASS_AND_CHECK(MonoObject, GDMono::get_singleton()->get_corlib_assembly()->get_class(mono_get_object_class()));
+	CACHE_CLASS_AND_CHECK(bool, GDMono::get_singleton()->get_corlib_assembly()->get_class(mono_get_boolean_class()));
+	CACHE_CLASS_AND_CHECK(int8_t, GDMono::get_singleton()->get_corlib_assembly()->get_class(mono_get_sbyte_class()));
+	CACHE_CLASS_AND_CHECK(int16_t, GDMono::get_singleton()->get_corlib_assembly()->get_class(mono_get_int16_class()));
+	CACHE_CLASS_AND_CHECK(int32_t, GDMono::get_singleton()->get_corlib_assembly()->get_class(mono_get_int32_class()));
+	CACHE_CLASS_AND_CHECK(int64_t, GDMono::get_singleton()->get_corlib_assembly()->get_class(mono_get_int64_class()));
+	CACHE_CLASS_AND_CHECK(uint8_t, GDMono::get_singleton()->get_corlib_assembly()->get_class(mono_get_byte_class()));
+	CACHE_CLASS_AND_CHECK(uint16_t, GDMono::get_singleton()->get_corlib_assembly()->get_class(mono_get_uint16_class()));
+	CACHE_CLASS_AND_CHECK(uint32_t, GDMono::get_singleton()->get_corlib_assembly()->get_class(mono_get_uint32_class()));
+	CACHE_CLASS_AND_CHECK(uint64_t, GDMono::get_singleton()->get_corlib_assembly()->get_class(mono_get_uint64_class()));
+	CACHE_CLASS_AND_CHECK(float, GDMono::get_singleton()->get_corlib_assembly()->get_class(mono_get_single_class()));
+	CACHE_CLASS_AND_CHECK(double, GDMono::get_singleton()->get_corlib_assembly()->get_class(mono_get_double_class()));
+	CACHE_CLASS_AND_CHECK(String, GDMono::get_singleton()->get_corlib_assembly()->get_class(mono_get_string_class()));
+	CACHE_CLASS_AND_CHECK(IntPtr, GDMono::get_singleton()->get_corlib_assembly()->get_class(mono_get_intptr_class()));
+}
+
+void update_godot_api_cache() {
+
+	CACHE_CLASS_AND_CHECK(Vector2, GODOT_API_CLASS(Vector2));
+	CACHE_CLASS_AND_CHECK(Rect2, GODOT_API_CLASS(Rect2));
+	CACHE_CLASS_AND_CHECK(Transform2D, GODOT_API_CLASS(Transform2D));
+	CACHE_CLASS_AND_CHECK(Vector3, GODOT_API_CLASS(Vector3));
+	CACHE_CLASS_AND_CHECK(Basis, GODOT_API_CLASS(Basis));
+	CACHE_CLASS_AND_CHECK(Quat, GODOT_API_CLASS(Quat));
+	CACHE_CLASS_AND_CHECK(Transform, GODOT_API_CLASS(Transform));
+	CACHE_CLASS_AND_CHECK(Rect3, GODOT_API_CLASS(Rect3));
+	CACHE_CLASS_AND_CHECK(Color, GODOT_API_CLASS(Color));
+	CACHE_CLASS_AND_CHECK(Plane, GODOT_API_CLASS(Plane));
+	CACHE_CLASS_AND_CHECK(NodePath, GODOT_API_CLASS(NodePath));
+	CACHE_CLASS_AND_CHECK(RID, GODOT_API_CLASS(NodePath));
+	CACHE_CLASS_AND_CHECK(GodotObject, GODOT_API_CLASS(Object));
+	CACHE_CLASS_AND_CHECK(Node, GODOT_API_CLASS(Node));
+	CACHE_CLASS_AND_CHECK(Control, GODOT_API_CLASS(Control));
+	CACHE_CLASS_AND_CHECK(Spatial, GODOT_API_CLASS(Spatial));
+	CACHE_CLASS_AND_CHECK(WeakRef, GODOT_API_CLASS(WeakRef));
+	CACHE_CLASS_AND_CHECK(MarshalUtils, GODOT_API_CLASS(MarshalUtils));
+
+	// Attributes
+	CACHE_CLASS_AND_CHECK(ExportAttribute, GODOT_API_CLASS(ExportAttribute));
+	CACHE_FIELD_AND_CHECK(ExportAttribute, hint, CACHED_CLASS(ExportAttribute)->get_field("hint"));
+	CACHE_FIELD_AND_CHECK(ExportAttribute, hint_string, CACHED_CLASS(ExportAttribute)->get_field("hint_string"));
+	CACHE_FIELD_AND_CHECK(ExportAttribute, usage, CACHED_CLASS(ExportAttribute)->get_field("usage"));
+	CACHE_CLASS_AND_CHECK(ToolAttribute, GODOT_API_CLASS(ToolAttribute));
+	CACHE_CLASS_AND_CHECK(RemoteAttribute, GODOT_API_CLASS(RemoteAttribute));
+	CACHE_CLASS_AND_CHECK(SyncAttribute, GODOT_API_CLASS(SyncAttribute));
+	CACHE_CLASS_AND_CHECK(MasterAttribute, GODOT_API_CLASS(MasterAttribute));
+	CACHE_CLASS_AND_CHECK(SlaveAttribute, GODOT_API_CLASS(SlaveAttribute));
+	CACHE_CLASS_AND_CHECK(GodotMethodAttribute, GODOT_API_CLASS(GodotMethodAttribute));
+	CACHE_FIELD_AND_CHECK(GodotMethodAttribute, methodName, CACHED_CLASS(GodotMethodAttribute)->get_field("methodName"));
+
+	CACHE_FIELD_AND_CHECK(GodotObject, ptr, CACHED_CLASS(GodotObject)->get_field(BINDINGS_PTR_FIELD));
+	CACHE_FIELD_AND_CHECK(NodePath, ptr, CACHED_CLASS(NodePath)->get_field(BINDINGS_PTR_FIELD));
+	CACHE_FIELD_AND_CHECK(RID, ptr, CACHED_CLASS(RID)->get_field(BINDINGS_PTR_FIELD));
+
+	CACHE_METHOD_THUNK_AND_CHECK(MarshalUtils, DictionaryToArrays, (MarshalUtils_DictToArrays)CACHED_CLASS(MarshalUtils)->get_method("DictionaryToArrays", 3)->get_thunk());
+	CACHE_METHOD_THUNK_AND_CHECK(MarshalUtils, ArraysToDictionary, (MarshalUtils_ArraysToDict)CACHED_CLASS(MarshalUtils)->get_method("ArraysToDictionary", 2)->get_thunk());
+	CACHE_METHOD_THUNK_AND_CHECK(GodotObject, _AwaitedSignalCallback, (GodotObject__AwaitedSignalCallback)CACHED_CLASS(GodotObject)->get_method("_AwaitedSignalCallback", 2)->get_thunk());
+	CACHE_METHOD_THUNK_AND_CHECK(SignalAwaiter, FailureCallback, (SignalAwaiter_FailureCallback)GODOT_API_CLASS(SignalAwaiter)->get_method("FailureCallback", 0)->get_thunk());
+	CACHE_METHOD_THUNK_AND_CHECK(GodotTaskScheduler, Activate, (GodotTaskScheduler_Activate)GODOT_API_CLASS(GodotTaskScheduler)->get_method("Activate", 0)->get_thunk());
+
+	{
+		/*
+		 * TODO Right now we only support Dictionary<object, object>.
+		 * It would be great if we could support other key/value types
+		 * without forcing the user to copy the entries.
+		 */
+		GDMonoMethod *method_get_dict_type = CACHED_CLASS(MarshalUtils)->get_method("GetDictionaryType", 0);
+		ERR_FAIL_NULL(method_get_dict_type);
+		MonoReflectionType *dict_refl_type = (MonoReflectionType *)method_get_dict_type->invoke(NULL);
+		ERR_FAIL_NULL(dict_refl_type);
+		MonoType *dict_type = mono_reflection_type_get_type(dict_refl_type);
+		ERR_FAIL_NULL(dict_type);
+
+		CACHE_RAW_MONO_CLASS_AND_CHECK(Dictionary, mono_class_from_mono_type(dict_type));
+	}
+
+	MonoObject *task_scheduler = mono_object_new(SCRIPTS_DOMAIN, GODOT_API_CLASS(GodotTaskScheduler)->get_raw());
+	mono_runtime_object_init(task_scheduler);
+	mono_cache.task_scheduler_handle = MonoGCHandle::create_strong(task_scheduler);
+}
+
+void clear_cache() {
+	mono_cache.cleanup();
+	mono_cache.clear_members();
+}
+
+MonoObject *unmanaged_get_managed(Object *unmanaged) {
+	if (unmanaged) {
+		if (unmanaged->get_script_instance()) {
+			CSharpInstance *cs_instance = CAST_CSHARP_INSTANCE(unmanaged->get_script_instance());
+
+			if (cs_instance) {
+				return cs_instance->get_mono_object();
+			}
+		}
+
+		// Only called if the owner does not have a CSharpInstance
+		void *data = unmanaged->get_script_instance_binding(CSharpLanguage::get_singleton()->get_language_index());
+
+		if (data) {
+			return ((Map<Object *, Ref<MonoGCHandle> >::Element *)data)->value()->get_target();
+		}
+	}
+
+	return NULL;
+}
+
+void set_main_thread(MonoThread *p_thread) {
+	mono_thread_set_main(p_thread);
+}
+
+void attach_current_thread() {
+	ERR_FAIL_COND(!GDMono::get_singleton()->is_runtime_initialized());
+	MonoThread *mono_thread = mono_thread_attach(SCRIPTS_DOMAIN);
+	ERR_FAIL_NULL(mono_thread);
+}
+
+void detach_current_thread() {
+	ERR_FAIL_COND(!GDMono::get_singleton()->is_runtime_initialized());
+	MonoThread *mono_thread = mono_thread_current();
+	ERR_FAIL_NULL(mono_thread);
+	mono_thread_detach(mono_thread);
+}
+
+MonoThread *get_current_thread() {
+	return mono_thread_current();
+}
+
+GDMonoClass *get_object_class(MonoObject *p_object) {
+	return GDMono::get_singleton()->get_class(mono_object_get_class(p_object));
+}
+
+GDMonoClass *type_get_proxy_class(const StringName &p_type) {
+	String class_name = p_type;
+
+	if (class_name[0] == '_')
+		class_name = class_name.substr(1, class_name.length());
+
+	GDMonoClass *klass = GDMono::get_singleton()->get_api_assembly()->get_class(BINDINGS_NAMESPACE, class_name);
+
+#ifdef TOOLS_ENABLED
+	if (!klass) {
+		return GDMono::get_singleton()->get_editor_api_assembly()->get_class(BINDINGS_NAMESPACE, class_name);
+	}
+#endif
+
+	return klass;
+}
+
+GDMonoClass *get_class_native_base(GDMonoClass *p_class) {
+	GDMonoClass *klass = p_class;
+
+	do {
+		const GDMonoAssembly *assembly = klass->get_assembly();
+		if (assembly == GDMono::get_singleton()->get_api_assembly())
+			return klass;
+#ifdef TOOLS_ENABLED
+		if (assembly == GDMono::get_singleton()->get_editor_api_assembly())
+			return klass;
+#endif
+	} while ((klass = klass->get_parent_class()) != NULL);
+
+	return NULL;
+}
+
+MonoObject *create_managed_for_godot_object(GDMonoClass *p_class, const StringName &p_native, Object *p_object) {
+	String object_type = p_object->get_class_name();
+
+	if (object_type[0] == '_')
+		object_type = object_type.substr(1, object_type.length());
+
+	if (!ClassDB::is_parent_class(object_type, p_native)) {
+		ERR_EXPLAIN("Type inherits from native type '" + p_native + "', so it can't be instanced in object of type: '" + p_object->get_class() + "'");
+		ERR_FAIL_V(NULL);
+	}
+
+	MonoObject *mono_object = mono_object_new(SCRIPTS_DOMAIN, p_class->get_raw());
+	ERR_FAIL_NULL_V(mono_object, NULL);
+
+	CACHED_FIELD(GodotObject, ptr)->set_value_raw(mono_object, p_object);
+
+	// Construct
+	mono_runtime_object_init(mono_object);
+
+	return mono_object;
+}
+
+MonoObject *create_managed_from(const NodePath &p_from) {
+	MonoObject *mono_object = mono_object_new(SCRIPTS_DOMAIN, CACHED_CLASS_RAW(NodePath));
+	ERR_FAIL_NULL_V(mono_object, NULL);
+
+	// Construct
+	mono_runtime_object_init(mono_object);
+
+	CACHED_FIELD(NodePath, ptr)->set_value_raw(mono_object, memnew(NodePath(p_from)));
+
+	return mono_object;
+}
+
+MonoObject *create_managed_from(const RID &p_from) {
+	MonoObject *mono_object = mono_object_new(SCRIPTS_DOMAIN, CACHED_CLASS_RAW(RID));
+	ERR_FAIL_NULL_V(mono_object, NULL);
+
+	// Construct
+	mono_runtime_object_init(mono_object);
+
+	CACHED_FIELD(RID, ptr)->set_value_raw(mono_object, memnew(RID(p_from)));
+
+	return mono_object;
+}
+
+MonoDomain *create_domain(const String &p_friendly_name) {
+	MonoDomain *domain = mono_domain_create_appdomain((char *)p_friendly_name.utf8().get_data(), NULL);
+
+	if (domain) {
+		// Workaround to avoid this exception:
+		// System.Configuration.ConfigurationErrorsException: Error Initializing the configuration system.
+		// ---> System.ArgumentException: The 'ExeConfigFilename' argument cannot be null.
+		mono_domain_set_config(domain, ".", "");
+	}
+
+	return domain;
+}
+
+String get_exception_name_and_message(MonoObject *p_ex) {
+	String res;
+
+	MonoClass *klass = mono_object_get_class(p_ex);
+	MonoType *type = mono_class_get_type(klass);
+
+	char *full_name = mono_type_full_name(type);
+	res += full_name;
+	mono_free(full_name);
+
+	res += ": ";
+
+	MonoProperty *prop = mono_class_get_property_from_name(klass, "Message");
+	MonoString *msg = (MonoString *)mono_property_get_value(prop, p_ex, NULL, NULL);
+	res += GDMonoMarshal::mono_string_to_godot(msg);
+
+	return res;
+}
+}
diff --git a/modules/mono/mono_gd/gd_mono_utils.h b/modules/mono/mono_gd/gd_mono_utils.h
new file mode 100644
index 00000000000..f97f048aa93
--- /dev/null
+++ b/modules/mono/mono_gd/gd_mono_utils.h
@@ -0,0 +1,182 @@
+/*************************************************************************/
+/*  gd_mono_utils.h                                                      */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2017 Godot Engine contributors (cf. AUTHORS.md)    */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+#ifndef GD_MONOUTILS_H
+#define GD_MONOUTILS_H
+
+#include <mono/metadata/threads.h>
+
+#include "../mono_gc_handle.h"
+#include "gd_mono_header.h"
+
+#include "object.h"
+#include "reference.h"
+
+namespace GDMonoUtils {
+
+typedef MonoObject *(*MarshalUtils_DictToArrays)(MonoObject *, MonoArray **, MonoArray **, MonoObject **);
+typedef MonoObject *(*MarshalUtils_ArraysToDict)(MonoArray *, MonoArray *, MonoObject **);
+typedef MonoObject *(*GodotObject__AwaitedSignalCallback)(MonoObject *, MonoArray **, MonoObject *, MonoObject **);
+typedef MonoObject *(*SignalAwaiter_FailureCallback)(MonoObject *, MonoObject **);
+typedef MonoObject *(*GodotTaskScheduler_Activate)(MonoObject *, MonoObject **);
+
+struct MonoCache {
+	// Format for cached classes in the Godot namespace: class_<Class>
+	// Macro: CACHED_CLASS(<Class>)
+
+	// Format for cached classes in a different namespace: class_<Namespace>_<Class>
+	// Macro: CACHED_NS_CLASS(<Namespace>, <Class>)
+
+	// -----------------------------------------------
+	// corlib classes
+
+	// Let's use the no-namespace format for these too
+	GDMonoClass *class_MonoObject;
+	GDMonoClass *class_bool;
+	GDMonoClass *class_int8_t;
+	GDMonoClass *class_int16_t;
+	GDMonoClass *class_int32_t;
+	GDMonoClass *class_int64_t;
+	GDMonoClass *class_uint8_t;
+	GDMonoClass *class_uint16_t;
+	GDMonoClass *class_uint32_t;
+	GDMonoClass *class_uint64_t;
+	GDMonoClass *class_float;
+	GDMonoClass *class_double;
+	GDMonoClass *class_String;
+	GDMonoClass *class_IntPtr;
+
+	MonoClass *rawclass_Dictionary;
+	// -----------------------------------------------
+
+	GDMonoClass *class_Vector2;
+	GDMonoClass *class_Rect2;
+	GDMonoClass *class_Transform2D;
+	GDMonoClass *class_Vector3;
+	GDMonoClass *class_Basis;
+	GDMonoClass *class_Quat;
+	GDMonoClass *class_Transform;
+	GDMonoClass *class_Rect3;
+	GDMonoClass *class_Color;
+	GDMonoClass *class_Plane;
+	GDMonoClass *class_NodePath;
+	GDMonoClass *class_RID;
+	GDMonoClass *class_GodotObject;
+	GDMonoClass *class_Node;
+	GDMonoClass *class_Control;
+	GDMonoClass *class_Spatial;
+	GDMonoClass *class_WeakRef;
+	GDMonoClass *class_MarshalUtils;
+
+	GDMonoClass *class_ExportAttribute;
+	GDMonoField *field_ExportAttribute_hint;
+	GDMonoField *field_ExportAttribute_hint_string;
+	GDMonoField *field_ExportAttribute_usage;
+	GDMonoClass *class_ToolAttribute;
+	GDMonoClass *class_RemoteAttribute;
+	GDMonoClass *class_SyncAttribute;
+	GDMonoClass *class_MasterAttribute;
+	GDMonoClass *class_SlaveAttribute;
+	GDMonoClass *class_GodotMethodAttribute;
+	GDMonoField *field_GodotMethodAttribute_methodName;
+
+	GDMonoField *field_GodotObject_ptr;
+	GDMonoField *field_NodePath_ptr;
+	GDMonoField *field_Image_ptr;
+	GDMonoField *field_RID_ptr;
+
+	MarshalUtils_DictToArrays methodthunk_MarshalUtils_DictionaryToArrays;
+	MarshalUtils_ArraysToDict methodthunk_MarshalUtils_ArraysToDictionary;
+	GodotObject__AwaitedSignalCallback methodthunk_GodotObject__AwaitedSignalCallback;
+	SignalAwaiter_FailureCallback methodthunk_SignalAwaiter_FailureCallback;
+	GodotTaskScheduler_Activate methodthunk_GodotTaskScheduler_Activate;
+
+	Ref<MonoGCHandle> task_scheduler_handle;
+
+	void clear_members();
+	void cleanup() {}
+
+	MonoCache() {
+		clear_members();
+	}
+};
+
+extern MonoCache mono_cache;
+
+void update_corlib_cache();
+void update_godot_api_cache();
+void clear_cache();
+
+_FORCE_INLINE_ void hash_combine(uint32_t &p_hash, const uint32_t &p_with_hash) {
+	p_hash ^= p_with_hash + 0x9e3779b9 + (p_hash << 6) + (p_hash >> 2);
+}
+
+/**
+ * If the object has a csharp script, returns the target of the gchandle stored in the script instance
+ * Otherwise returns a newly constructed MonoObject* which is attached to the object
+ * Returns NULL on error
+ */
+MonoObject *unmanaged_get_managed(Object *unmanaged);
+
+void set_main_thread(MonoThread *p_thread);
+void attach_current_thread();
+void detach_current_thread();
+MonoThread *get_current_thread();
+
+GDMonoClass *get_object_class(MonoObject *p_object);
+GDMonoClass *type_get_proxy_class(const StringName &p_type);
+GDMonoClass *get_class_native_base(GDMonoClass *p_class);
+
+MonoObject *create_managed_for_godot_object(GDMonoClass *p_class, const StringName &p_native, Object *p_object);
+
+MonoObject *create_managed_from(const NodePath &p_from);
+MonoObject *create_managed_from(const RID &p_from);
+
+MonoDomain *create_domain(const String &p_friendly_name);
+
+String get_exception_name_and_message(MonoObject *p_ex);
+
+} // GDMonoUtils
+
+#define NATIVE_GDMONOCLASS_NAME(m_class) (GDMonoMarshal::mono_string_to_godot((MonoString *)m_class->get_field("nativeName")->get_value(NULL)))
+
+#define CACHED_CLASS(m_class) (GDMonoUtils::mono_cache.class_##m_class)
+#define CACHED_CLASS_RAW(m_class) (GDMonoUtils::mono_cache.class_##m_class->get_raw())
+#define CACHED_NS_CLASS(m_ns, m_class) (GDMonoUtils::mono_cache.class_##m_ns##_##m_class)
+#define CACHED_RAW_MONO_CLASS(m_class) (GDMonoUtils::mono_cache.rawclass_##m_class)
+#define CACHED_FIELD(m_class, m_field) (GDMonoUtils::mono_cache.field_##m_class##_##m_field)
+#define CACHED_METHOD_THUNK(m_class, m_method) (GDMonoUtils::mono_cache.methodthunk_##m_class##_##m_method)
+
+#ifdef REAL_T_IS_DOUBLE
+#define REAL_T_MONOCLASS CACHED_CLASS_RAW(double)
+#else
+#define REAL_T_MONOCLASS CACHED_CLASS_RAW(float)
+#endif
+
+#endif // GD_MONOUTILS_H
diff --git a/modules/mono/mono_reg_utils.py b/modules/mono/mono_reg_utils.py
new file mode 100644
index 00000000000..6f1620ff49d
--- /dev/null
+++ b/modules/mono/mono_reg_utils.py
@@ -0,0 +1,54 @@
+import os
+
+if os.name == 'nt':
+    import _winreg as winreg
+
+
+def _reg_open_key(key, subkey):
+    try:
+        return winreg.OpenKey(key, subkey)
+    except (WindowsError, EnvironmentError) as e:
+        import platform
+        if platform.architecture()[0] == '32bit':
+            bitness_sam = winreg.KEY_WOW64_64KEY
+        else:
+            bitness_sam = winreg.KEY_WOW64_32KEY
+        return winreg.OpenKey(key, subkey, 0, winreg.KEY_READ | bitness_sam)
+
+
+def _find_mono_in_reg(subkey):
+    try:
+        with _reg_open_key(winreg.HKEY_LOCAL_MACHINE, subkey) as hKey:
+            value, regtype = winreg.QueryValueEx(hKey, 'SdkInstallRoot')
+            return value
+    except (WindowsError, EnvironmentError) as e:
+        return None
+
+def _find_mono_in_reg_old(subkey):
+    try:
+        with _reg_open_key(winreg.HKEY_LOCAL_MACHINE, subkey) as hKey:
+            default_clr, regtype = winreg.QueryValueEx(hKey, 'DefaultCLR')
+            if default_clr:
+                return _find_mono_in_reg(subkey + '\\' + default_clr)
+            return None
+    except (WindowsError, EnvironmentError):
+        return None
+
+
+def find_mono_root_dir():
+    dir = _find_mono_in_reg(r'SOFTWARE\Mono')
+    if dir:
+        return dir
+    dir = _find_mono_in_reg_old(r'SOFTWARE\Novell\Mono')
+    if dir:
+        return dir
+    return None
+
+
+def find_msbuild_tools_path_reg():
+    try:
+        with _reg_open_key(winreg.HKEY_LOCAL_MACHINE, r'SOFTWARE\Microsoft\MSBuild\ToolsVersions\4.0') as hKey:
+            value, regtype = winreg.QueryValueEx(hKey, 'MSBuildToolsPath')
+            return value
+    except (WindowsError, EnvironmentError) as e:
+        return None
diff --git a/modules/mono/register_types.cpp b/modules/mono/register_types.cpp
new file mode 100644
index 00000000000..2a84f0d1a63
--- /dev/null
+++ b/modules/mono/register_types.cpp
@@ -0,0 +1,71 @@
+/*************************************************************************/
+/*  register_types.cpp                                                   */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2017 Godot Engine contributors (cf. AUTHORS.md)    */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+#include "register_types.h"
+
+#include "project_settings.h"
+
+#include "csharp_script.h"
+
+CSharpLanguage *script_language_cs = NULL;
+ResourceFormatLoaderCSharpScript *resource_loader_cs = NULL;
+ResourceFormatSaverCSharpScript *resource_saver_cs = NULL;
+
+_GodotSharp *_godotsharp = NULL;
+
+void register_mono_types() {
+	ClassDB::register_class<CSharpScript>();
+
+	_godotsharp = memnew(_GodotSharp);
+
+	ProjectSettings::get_singleton()->add_singleton(ProjectSettings::Singleton("GodotSharp", _GodotSharp::get_singleton()));
+
+	script_language_cs = memnew(CSharpLanguage);
+	script_language_cs->set_language_index(ScriptServer::get_language_count());
+	ScriptServer::register_language(script_language_cs);
+
+	resource_loader_cs = memnew(ResourceFormatLoaderCSharpScript);
+	ResourceLoader::add_resource_format_loader(resource_loader_cs);
+	resource_saver_cs = memnew(ResourceFormatSaverCSharpScript);
+	ResourceSaver::add_resource_format_saver(resource_saver_cs);
+}
+
+void unregister_mono_types() {
+	ScriptServer::unregister_language(script_language_cs);
+
+	if (script_language_cs)
+		memdelete(script_language_cs);
+	if (resource_loader_cs)
+		memdelete(resource_loader_cs);
+	if (resource_saver_cs)
+		memdelete(resource_saver_cs);
+
+	if (_godotsharp)
+		memdelete(_godotsharp);
+}
diff --git a/modules/mono/register_types.h b/modules/mono/register_types.h
new file mode 100644
index 00000000000..6cf706b9441
--- /dev/null
+++ b/modules/mono/register_types.h
@@ -0,0 +1,31 @@
+/*************************************************************************/
+/*  register_types.h                                                     */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2017 Godot Engine contributors (cf. AUTHORS.md)    */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+void register_mono_types();
+void unregister_mono_types();
diff --git a/modules/mono/signal_awaiter_utils.cpp b/modules/mono/signal_awaiter_utils.cpp
new file mode 100644
index 00000000000..012dd119b1b
--- /dev/null
+++ b/modules/mono/signal_awaiter_utils.cpp
@@ -0,0 +1,77 @@
+/*************************************************************************/
+/*  signal_awaiter_utils.cpp                                             */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2017 Godot Engine contributors (cf. AUTHORS.md)    */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+#include "signal_awaiter_utils.h"
+
+#include "mono_gd/gd_mono_utils.h"
+
+namespace SignalAwaiterUtils {
+
+Error connect_signal_awaiter(Object *p_source, const String &p_signal, Object *p_target, MonoObject *p_awaiter) {
+
+	ERR_FAIL_NULL_V(p_source, ERR_INVALID_DATA);
+	ERR_FAIL_NULL_V(p_target, ERR_INVALID_DATA);
+
+	uint32_t awaiter_handle = MonoGCHandle::make_strong_handle(p_awaiter);
+	Ref<SignalAwaiterHandle> sa_con = memnew(SignalAwaiterHandle(awaiter_handle));
+	Vector<Variant> binds;
+	binds.push_back(sa_con);
+	Error err = p_source->connect(p_signal, p_target, "_AwaitedSignalCallback", binds, Object::CONNECT_ONESHOT);
+
+	if (err != OK) {
+		// set it as completed to prevent it from calling the failure callback when deleted
+		// the awaiter will be aware of the failure by checking the returned error
+		sa_con->set_completed(true);
+	}
+
+	return err;
+}
+}
+
+SignalAwaiterHandle::SignalAwaiterHandle(uint32_t p_handle)
+	: MonoGCHandle(p_handle) {
+}
+
+SignalAwaiterHandle::~SignalAwaiterHandle() {
+	if (!completed) {
+		GDMonoUtils::SignalAwaiter_FailureCallback thunk = CACHED_METHOD_THUNK(SignalAwaiter, FailureCallback);
+
+		MonoObject *awaiter = get_target();
+
+		if (awaiter) {
+			MonoObject *ex = NULL;
+			thunk(awaiter, &ex);
+
+			if (ex) {
+				mono_print_unhandled_exception(ex);
+				ERR_FAIL_V();
+			}
+		}
+	}
+}
diff --git a/modules/mono/signal_awaiter_utils.h b/modules/mono/signal_awaiter_utils.h
new file mode 100644
index 00000000000..422ed4754f9
--- /dev/null
+++ b/modules/mono/signal_awaiter_utils.h
@@ -0,0 +1,53 @@
+/*************************************************************************/
+/*  signal_awaiter_utils.h                                               */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2017 Godot Engine contributors (cf. AUTHORS.md)    */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+#ifndef SIGNAL_AWAITER_UTILS_H
+#define SIGNAL_AWAITER_UTILS_H
+
+#include "mono_gc_handle.h"
+#include "reference.h"
+
+namespace SignalAwaiterUtils {
+
+Error connect_signal_awaiter(Object *p_source, const String &p_signal, Object *p_target, MonoObject *p_awaiter);
+}
+
+class SignalAwaiterHandle : public MonoGCHandle {
+
+	bool completed;
+
+public:
+	_FORCE_INLINE_ bool is_completed() { return completed; }
+	_FORCE_INLINE_ void set_completed(bool p_completed) { completed = p_completed; }
+
+	SignalAwaiterHandle(uint32_t p_handle);
+	~SignalAwaiterHandle();
+};
+
+#endif // SIGNAL_AWAITER_UTILS_H
diff --git a/modules/mono/utils/mono_reg_utils.cpp b/modules/mono/utils/mono_reg_utils.cpp
new file mode 100644
index 00000000000..2e90b3b7160
--- /dev/null
+++ b/modules/mono/utils/mono_reg_utils.cpp
@@ -0,0 +1,228 @@
+/*************************************************************************/
+/*  mono_reg_utils.cpp                                                   */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2017 Godot Engine contributors (cf. AUTHORS.md)    */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+#include "mono_reg_utils.h"
+
+#ifdef WINDOWS_ENABLED
+
+#include "os/os.h"
+
+// Here, after os/os.h
+#include <windows.h>
+
+namespace MonoRegUtils {
+
+template <int>
+REGSAM bitness_sam_impl();
+
+template <>
+REGSAM bitness_sam_impl<4>() {
+	return KEY_WOW64_64KEY;
+}
+
+template <>
+REGSAM bitness_sam_impl<8>() {
+	return KEY_WOW64_32KEY;
+}
+
+REGSAM _get_bitness_sam() {
+	return bitness_sam_impl<sizeof(size_t)>();
+}
+
+LONG _RegOpenKey(HKEY hKey, LPCWSTR lpSubKey, PHKEY phkResult) {
+
+	LONG res = RegOpenKeyExW(hKey, lpSubKey, 0, KEY_READ, phkResult);
+
+	if (res != ERROR_SUCCESS)
+		res = RegOpenKeyExW(hKey, lpSubKey, 0, KEY_READ | _get_bitness_sam(), phkResult);
+
+	return res;
+}
+
+LONG _RegKeyQueryString(HKEY hKey, const String &p_value_name, String &r_value) {
+
+	Vector<WCHAR> buffer;
+	buffer.resize(512);
+	DWORD dwBufferSize = buffer.size();
+
+	LONG res = RegQueryValueExW(hKey, p_value_name.c_str(), 0, NULL, (LPBYTE)buffer.ptr(), &dwBufferSize);
+
+	if (res == ERROR_MORE_DATA) {
+		// dwBufferSize now contains the actual size
+		Vector<WCHAR> buffer;
+		buffer.resize(dwBufferSize);
+		res = RegQueryValueExW(hKey, p_value_name.c_str(), 0, NULL, (LPBYTE)buffer.ptr(), &dwBufferSize);
+	}
+
+	if (res == ERROR_SUCCESS) {
+		r_value = String(buffer.ptr(), buffer.size());
+	} else {
+		r_value = String();
+	}
+
+	return res;
+}
+
+LONG _find_mono_in_reg(const String &p_subkey, MonoRegInfo &r_info, bool p_old_reg = false) {
+
+	HKEY hKey;
+	LONG res = _RegOpenKey(HKEY_LOCAL_MACHINE, p_subkey.c_str(), &hKey);
+
+	if (res != ERROR_SUCCESS)
+		goto cleanup;
+
+	if (!p_old_reg) {
+		res = _RegKeyQueryString(hKey, "Version", r_info.version);
+		if (res != ERROR_SUCCESS)
+			goto cleanup;
+	}
+
+	res = _RegKeyQueryString(hKey, "SdkInstallRoot", r_info.install_root_dir);
+	if (res != ERROR_SUCCESS)
+		goto cleanup;
+
+	res = _RegKeyQueryString(hKey, "FrameworkAssemblyDirectory", r_info.assembly_dir);
+	if (res != ERROR_SUCCESS)
+		goto cleanup;
+
+	res = _RegKeyQueryString(hKey, "MonoConfigDir", r_info.config_dir);
+	if (res != ERROR_SUCCESS)
+		goto cleanup;
+
+	if (r_info.install_root_dir.ends_with("\\"))
+		r_info.bin_dir = r_info.install_root_dir + "bin";
+	else
+		r_info.bin_dir = r_info.install_root_dir + "\\bin";
+
+cleanup:
+	RegCloseKey(hKey);
+	return res;
+}
+
+LONG _find_mono_in_reg_old(const String &p_subkey, MonoRegInfo &r_info) {
+
+	String default_clr;
+
+	HKEY hKey;
+	LONG res = _RegOpenKey(HKEY_LOCAL_MACHINE, p_subkey.c_str(), &hKey);
+
+	if (res != ERROR_SUCCESS)
+		goto cleanup;
+
+	res = _RegKeyQueryString(hKey, "DefaultCLR", default_clr);
+
+	if (res == ERROR_SUCCESS && default_clr.length()) {
+		r_info.version = default_clr;
+		res = _find_mono_in_reg(p_subkey + "\\" + default_clr, r_info, true);
+	}
+
+cleanup:
+	RegCloseKey(hKey);
+	return res;
+}
+
+MonoRegInfo find_mono() {
+
+	MonoRegInfo info;
+
+	if (_find_mono_in_reg("Software\\Mono", info) == ERROR_SUCCESS)
+		return info;
+
+	if (_find_mono_in_reg_old("Software\\Novell\\Mono", info) == ERROR_SUCCESS)
+		return info;
+
+	ERR_PRINT("Cannot find mono in the registry");
+
+	return MonoRegInfo();
+}
+
+String find_msbuild_tools_path() {
+
+	String msbuild_tools_path;
+
+	// Try to find 15.0 with vswhere
+
+	String vswhere_path = OS::get_singleton()->get_environment(sizeof(size_t) == 8 ? "ProgramFiles(x86)" : "ProgramFiles");
+	vswhere_path += "\\Microsoft Visual Studio\\Installer\\vswhere.exe";
+
+	List<String> vswhere_args;
+	vswhere_args.push_back("-latest");
+	vswhere_args.push_back("-requires");
+	vswhere_args.push_back("Microsoft.Component.MSBuild");
+
+	String output;
+	int exit_code;
+	OS::get_singleton()->execute(vswhere_path, vswhere_args, true, NULL, &output, &exit_code);
+
+	if (exit_code == 0) {
+		Vector<String> lines = output.split("\n");
+
+		for (int i = 0; i < lines.size(); i++) {
+			const String &line = lines[i];
+			int sep_idx = line.find(":");
+
+			if (sep_idx > 0) {
+				String key = line.substr(0, sep_idx); // No need to trim
+
+				if (key == "installationPath") {
+					String val = line.substr(sep_idx + 1, line.length()).strip_edges();
+
+					ERR_BREAK(val.empty());
+
+					if (!val.ends_with("\\")) {
+						val += "\\";
+					}
+
+					return val + "MSBuild\\15.0\\Bin";
+				}
+			}
+		}
+	}
+
+	// Try to find 14.0 in the Registry
+
+	HKEY hKey;
+	LONG res = _RegOpenKey(HKEY_LOCAL_MACHINE, L"SOFTWARE\\Microsoft\\MSBuild\\ToolsVersions\\14.0", &hKey);
+
+	if (res != ERROR_SUCCESS)
+		goto cleanup;
+
+	res = _RegKeyQueryString(hKey, "MSBuildToolsPath", msbuild_tools_path);
+
+	if (res != ERROR_SUCCESS)
+		goto cleanup;
+
+cleanup:
+	RegCloseKey(hKey);
+
+	return msbuild_tools_path;
+}
+} // namespace MonoRegUtils
+
+#endif WINDOWS_ENABLED
diff --git a/modules/mono/utils/mono_reg_utils.h b/modules/mono/utils/mono_reg_utils.h
new file mode 100644
index 00000000000..4cc4965acb9
--- /dev/null
+++ b/modules/mono/utils/mono_reg_utils.h
@@ -0,0 +1,54 @@
+/*************************************************************************/
+/*  mono_reg_utils.h                                                     */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2017 Godot Engine contributors (cf. AUTHORS.md)    */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+#ifndef MONO_REG_UTILS_H
+#define MONO_REG_UTILS_H
+
+#ifdef WINDOWS_ENABLED
+
+#include "ustring.h"
+
+struct MonoRegInfo {
+
+	String version;
+	String install_root_dir;
+	String assembly_dir;
+	String config_dir;
+	String bin_dir;
+};
+
+namespace MonoRegUtils {
+
+MonoRegInfo find_mono();
+String find_msbuild_tools_path();
+} // MonoRegUtils
+
+#endif // WINDOWS_ENABLED
+
+#endif // MONO_REG_UTILS_H
diff --git a/modules/mono/utils/path_utils.cpp b/modules/mono/utils/path_utils.cpp
new file mode 100644
index 00000000000..c8581f6122e
--- /dev/null
+++ b/modules/mono/utils/path_utils.cpp
@@ -0,0 +1,111 @@
+/*************************************************************************/
+/*  path_utils.cpp                                                       */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2017 Godot Engine contributors (cf. AUTHORS.md)    */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+#include "path_utils.h"
+
+#include "os/dir_access.h"
+#include "os/file_access.h"
+#include "os/os.h"
+#include "project_settings.h"
+
+#ifdef WINDOWS_ENABLED
+#define ENV_PATH_SEP ";"
+#else
+#define ENV_PATH_SEP ":"
+#include <limits.h>
+#endif
+
+#include <stdlib.h>
+
+String path_which(const String &p_name) {
+
+#ifdef WINDOWS_ENABLED
+	Vector<String> exts = OS::get_singleton()->get_environment("PATHEXT").split(ENV_PATH_SEP, false);
+#endif
+	Vector<String> env_path = OS::get_singleton()->get_environment("PATH").split(ENV_PATH_SEP, false);
+
+	if (env_path.empty())
+		return String();
+
+	for (int i = 0; i < env_path.size(); i++) {
+		String p = path_join(env_path[i], p_name);
+
+		if (FileAccess::exists(p))
+			return p;
+
+#ifdef WINDOWS_ENABLED
+		for (int j = 0; j < exts.size(); j++) {
+			String p2 = p + exts[j];
+
+			if (FileAccess::exists(p2))
+				return p2;
+		}
+#endif
+	}
+
+	return String();
+}
+
+void fix_path(const String &p_path, String &r_out) {
+	r_out = p_path.replace("\\", "/");
+
+	while (true) { // in case of using 2 or more slash
+		String compare = r_out.replace("//", "/");
+		if (r_out == compare)
+			break;
+		else
+			r_out = compare;
+	}
+}
+
+bool rel_path_to_abs(const String &p_existing_path, String &r_abs_path) {
+#ifdef WINDOWS_ENABLED
+	CharType ret[_MAX_PATH];
+	if (_wfullpath(ret, p_existing_path.c_str(), _MAX_PATH)) {
+		String abspath = String(ret).replace("\\", "/");
+		int pos = abspath.find(":/");
+		if (pos != -1) {
+			r_abs_path = abspath.substr(pos - 1, abspath.length());
+		} else {
+			r_abs_path = abspath;
+		}
+		return true;
+	}
+#else
+	char ret[PATH_MAX];
+	if (realpath(p_existing_path.utf8().get_data(), ret)) {
+		String retstr;
+		if (!retstr.parse_utf8(ret)) {
+			r_abs_path = retstr;
+			return true;
+		}
+	}
+#endif
+	return false;
+}
diff --git a/modules/mono/utils/path_utils.h b/modules/mono/utils/path_utils.h
new file mode 100644
index 00000000000..445604300db
--- /dev/null
+++ b/modules/mono/utils/path_utils.h
@@ -0,0 +1,53 @@
+/*************************************************************************/
+/*  path_utils.h                                                         */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2017 Godot Engine contributors (cf. AUTHORS.md)    */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+#ifndef PATH_UTILS_H
+#define PATH_UTILS_H
+
+#include "ustring.h"
+
+_FORCE_INLINE_ String path_join(const String &e1, const String &e2) {
+	return e1.plus_file(e2);
+}
+
+_FORCE_INLINE_ String path_join(const String &e1, const String &e2, const String &e3) {
+	return e1.plus_file(e2).plus_file(e3);
+}
+
+_FORCE_INLINE_ String path_join(const String &e1, const String &e2, const String &e3, const String &e4) {
+	return e1.plus_file(e2).plus_file(e3).plus_file(e4);
+}
+
+String path_which(const String &p_name);
+
+void fix_path(const String &p_path, String &r_out);
+
+bool rel_path_to_abs(const String &p_existing_path, String &r_abs_path);
+
+#endif // PATH_UTILS_H
diff --git a/modules/mono/utils/string_utils.cpp b/modules/mono/utils/string_utils.cpp
new file mode 100644
index 00000000000..de1a60dbd14
--- /dev/null
+++ b/modules/mono/utils/string_utils.cpp
@@ -0,0 +1,128 @@
+/*************************************************************************/
+/*  string_utils.cpp                                                     */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2017 Godot Engine contributors (cf. AUTHORS.md)    */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+#include "string_utils.h"
+
+namespace {
+
+int sfind(const String &p_text, int p_from) {
+	if (p_from < 0)
+		return -1;
+
+	int src_len = 2;
+	int len = p_text.length();
+
+	if (src_len == 0 || len == 0)
+		return -1;
+
+	const CharType *src = p_text.c_str();
+
+	for (int i = p_from; i <= (len - src_len); i++) {
+		bool found = true;
+
+		for (int j = 0; j < src_len; j++) {
+			int read_pos = i + j;
+
+			if (read_pos >= len) {
+				ERR_PRINT("read_pos >= len");
+				return -1;
+			};
+
+			switch (j) {
+				case 0:
+					found = src[read_pos] == '%';
+					break;
+				case 1: {
+					CharType c = src[read_pos];
+					found = src[read_pos] == 's' || (c >= '0' || c <= '4');
+					break;
+				}
+				default:
+					found = false;
+			}
+
+			if (!found) {
+				break;
+			}
+		}
+
+		if (found)
+			return i;
+	}
+
+	return -1;
+}
+}
+
+String sformat(const String &p_text, const Variant &p1, const Variant &p2, const Variant &p3, const Variant &p4, const Variant &p5) {
+	if (p_text.length() < 2)
+		return p_text;
+
+	Array args;
+
+	if (p1.get_type() != Variant::NIL) {
+		args.push_back(p1);
+
+		if (p2.get_type() != Variant::NIL) {
+			args.push_back(p2);
+
+			if (p3.get_type() != Variant::NIL) {
+				args.push_back(p3);
+
+				if (p4.get_type() != Variant::NIL) {
+					args.push_back(p4);
+
+					if (p5.get_type() != Variant::NIL) {
+						args.push_back(p5);
+					}
+				}
+			}
+		}
+	}
+
+	String new_string;
+
+	int findex = 0;
+	int search_from = 0;
+	int result = 0;
+
+	while ((result = sfind(p_text, search_from)) >= 0) {
+		CharType c = p_text[result + 1];
+
+		int req_index = (c == 's' ? findex++ : c - '0');
+
+		new_string += p_text.substr(search_from, result - search_from);
+		new_string += args[req_index].operator String();
+		search_from = result + 2;
+	}
+
+	new_string += p_text.substr(search_from, p_text.length() - search_from);
+
+	return new_string;
+}
diff --git a/modules/mono/utils/string_utils.h b/modules/mono/utils/string_utils.h
new file mode 100644
index 00000000000..2f2c3c2d899
--- /dev/null
+++ b/modules/mono/utils/string_utils.h
@@ -0,0 +1,38 @@
+/*************************************************************************/
+/*  string_utils.h                                                       */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2017 Godot Engine contributors (cf. AUTHORS.md)    */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+#ifndef STRING_FORMAT_H
+#define STRING_FORMAT_H
+
+#include "ustring.h"
+#include "variant.h"
+
+String sformat(const String &p_text, const Variant &p1 = Variant(), const Variant &p2 = Variant(), const Variant &p3 = Variant(), const Variant &p4 = Variant(), const Variant &p5 = Variant());
+
+#endif // STRING_FORMAT_H