Here. From Ben Houston: This simple wrapper, written in Managed C++, allows for developers to make use of NVIDIA’s new Cg shader language from within a C# or VB.NET application. It is simple to use with existing OpenGL wrappers such as Llyod Dupond’s CsGL. A sample application that makes use of OpenGL and Cg via C#, ExoEngine, is available for download on the same site.