Has anyone seen or thought about making a mud with a C# codebase? I know there are Java ones out there and I've heard of people converting thier Java code, not mud, to C# and .net. Just wondering.

I have a working C# codebase. I dislike it greatly, however, and it's also buggy and full of hacks. However, I am working on reincarnation 3 as we speak. Of course, given that these are more for my own entertainment and learning than anything else, and thusly unoptimized, I doubt they're really what you're looking for.