Top 20 NuGet corefxlab Packages

Provides synchronization data structures for passing data between producers and consumers.
Non-allocating collections
Pool of unmanaged Span<byte> values
Non-allocating JSON reader and writer
A formatting library for pl-PL
Non-allocating formatting library
Tensor class which represents and extends multi-dimensional arrays
Dictionary allowing multiple values per key
.NET Framework 4.5 variant of the .NET Standard library for CLI commandline command parsing
Date and Time helper classes
JSON dynamic object
Manipulation of Matrices
Non-allocating collections