PerfCopy (nuget): Extension methods providing high performance deep copy capability for of arrays of common value types - currently: byte, char, short, int, long, and their unsigned brethren where applicable. Considerably faster than Array.Copy - and it's also faster than Buffer.BlockCopy in most situations!  High-performance enabled through use of optimised 'unsafe' blocks.  This package could be a good addition to other packages if you're building in copying of some kind that would benefit from being fast.
Keywords: deep|copy|performance