Supercluster.KDTree (nuget): This is an extremely-fast and easy to use KDTree written entirely in modern C#.  This is the fastest and simplest to use KDTree that I have been able to find for .NET.  The project has thorough documentation and is open-source.  This module is a part of the larger Supercluster project.  Tutorials and Wiki: https://github.com/MathFerret1013/Supercluster.KDTree/wiki MSDN Style Docs: http://mathferret1013.github.io/Supercluster.KDTree GitHub: https://github.com/MathFerret1013/Supercluster.KDTree
Keywords: kdtree|tree|machine|learning|supercluster|clustering|knn