6.3.0

• New extension methods:

StringBuilder AppendUrlEncoded(this StringBuilder, IEnumerable<byte>?);
StringBuilder AppendUrlEncoded(this StringBuilder, byte[]?);
StringBuilder AppendUrlEncoded(this StringBuilder, ReadOnlySpan<byte>);

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• New method in the UrlEncoding class:

bool TryDecodeToBytes(ReadOnlySpan<char>, out byte[]?);

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• Obsolete extension method:

bool IsHexDigit(this char);

.

• The StringBuilderExtension.AppendBase64 methods are less restrictive now and accept null as input.
• Most Base64.Encode methods are less restrictive now and accept null as input.

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.