6.1.0

• New static class UrlEncoding
• New enum Base64ParserOptions

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• New extension methods:

StringBuilder Replace(this StringBuilder, string, string?, int);
StringBuilder Replace(this StringBuilder, char, char, int);
StringBuilder AppendUrlEncoded(this StringBuilder, ReadOnlySpan<char>);

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• New polyfill for the StringBuilder class (.NET Framework 4.5, .NET Standard 2.0):

StringBuilder AppendUrlEncoded(this StringBuilder, string?);

Project reference: On some systems, the content of the CHM file in the Assets is blocked. Before opening the file right click on the file icon, select Properties, and check the "Allow" checkbox - if it is present - in the lower right corner of the General tab in the Properties dialog.