- Deprecated `Length` in favor of the `string.Length` property.
- Deprecated `Insert` in favor of the existing instance method with the same signature.
- Deprecated `Erase` in favor of `StringBuilder.Remove`.
- Deprecated `ToLower` and `ToUpper` in favor of the instance methods with the same signature.
- Deprecated `BeginsWith` in favor of `string.StartsWith`.
- Deprecated `EndsWith` in favor of the instance method with the same signature.
- Deprecated `Empty` in favor of `string.IsNullOrEmpty`.
- Deprecated `OrdAt` in favor of the `string[int]` indexer.
- Deprecated `LStrip` and `RStrip` in favor of `string.TrimStart` and `string.TrimEnd`.
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