Open Asset Import Library (short name: Assimp) is a portable Open Source library to import various well-known 3D model formats in a uniform manner. The most recent version also knows how to export 3d files and is therefore suitable as a general-purpose 3D model converter. This is a NuGet package of Assimp built with Visual Studio 2015 Update 2.
$ dotnet add package assimp.v140No README available.