Original lib3ds distribution can be found here: http://lib3ds.sourceforge.net

To build, you will need Visual C++ Express and Visual C# Express. Open the Visual Studio 2005 command prompt (from the Visual C++ start menu entry), cd to the checked out directory, and run 'make.bat'. The wrapper dll and assembly will be placed in 'Build/Debug' and 'Build/Release' respectively.

To use, reference the Lib3dsNet assembly from your C# application. The Lib3ds.dll must be in the application working directory (the Lib3dsNet.dll assembly must be in the application startup directory), where it is normally copied if the 'Copy Local' attribute is true in the IDE.