As of 2012-10-02, the well-known Tao project became officially abandoned and superseded by another project called OpenTK. However, since OpenTK follows a different way than Tao did, this project tries to carry on with the original design and ideas, but with cutting edge features. The ultimate goal is to have a 1:1 OpenGL binding for .NET, which supports OpenGL 4.x.
The project tries to keep as much of the original goals as possible, including licensing, etc.
Thanks for Taoclassic, it's great!