Can anyone suggest how to get started with 3d rendering in mono

I am new to mono and working on an linux system, having previously written ms c# on windows. I am writing a small application to generate tool paths for a simple cnc system I have built (its a hobby). I would like to include a 3d display of the path so that I can see what the output would be. I have some knowledge of 3d graphics theory but dont want to start from scratch (cant see the need). So can someone suggest a good package that I can use, I would like a 3d canvas widget that I can program against. I have looked around the net and found it most confusing regarding openGL which I assume is the way to go. I liked the look of the python opengl library it looked easy to work with however I do want to stick with c# as it is my preferred language. So can anyone suggest a c# based opengl framework available on ubuntu 8.04 seemingly as easy to use as the pyopengl one.

thanks

Alan