Today I released a project I've been playing around with for a year or so on Codeplex. It's called GLDotNet. From the project description:
C# wrapper for OpenGL. Partially generated from the OpenGL spec and partially written by hand, the aim is to have a flexible and native feeling C# binding.
I have generated functions from the OpenGL spec excluding 1 or 2 but unfortunately of the generated code is untested. There is a demo project included in the source code. The Github repository is located here: https://github.com/smack0007/GLDotNet