After discovering that Eclipse CDT does indeed work if MinGW is in the system path (on Windows) I thought, “What if there was a C# plugin for Eclipse? I would only need one IDE for everything!” I did a lot of Google searching to find that all plugins C# related were all outdated or abandoned, and it upset me. I have no problem with my IDE SharpDevelop, but if there was a C# plugin for Eclipse it would be so cool! I would love to try to make one, though I doubt I could pull it off by any means, but how hard would it be? Would it be nearly impossible or doable with lots of hard work?
I think you would sort of be writing a compiler… Yeah, lots of hard work. 
Couldn’t you just make a process, inherit the IO, and then run the C# compiler on that process?
I’ve started to play around with Eclipse plugins to see what you can do with them. I think I’ll slowly develop some C# Plugin and I doubt it’ll amount to anything.
With these kinds of projects I think it is required to put a certain amount of realism into play. Answer these questions:
- can you develop a plugin (probably yes)
- can you keep up working on it (probably yes)
- can you actually FINISH it? (…)
- can you keep supporting it when people find problems with it, or it has become out of date with the source platform? (…)
Creating a plugin is just fine. Creating a plugin which will be left in a broken status due to you being busy with other stuff - better not do it. IMO.