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. See the feature list online at http://assimp.sourceforge.net/main_features.html.
Get Started
$ dotnet add package AssimpReadme
No README available.