FastInfoset.NET offers an extremely compact and widely interoperable encoding of the XML Infoset that is integrated into the XML processing API of .NET and is as straight forward to use as the system-provided text encoding.

DotNetCompression is a real-time compression library in C# that provides ultra fast LZF4 streams, faster-than-native DEFLATE/ZLIB/GZIP streams and LZMA/BZIP2 streams for maximum compression.