I am using emacs with OmniSharp which... sort of works. It gives context-sensitive help when it's in the mood. It allows me to stay in emacs a little more )I don't like visual studio).
Are you on Linux? I found that on mac, omnisharp "just works" whereas on Linux it would only offer completion if the file has previously been visited that session.
Nope, windows. And if you update a file it sometimes doesn't update the info that changed in the file (even if the file is in a buffer), which is frustrating.
Point is, maybe have a look at OmniSharp.