No good options here.
I know, dabbrev does some neat things. But it pales in comparison to real code completion as you get in Visual Studio, or, I think, even SharpDevelop.
I checked out a module called csense that a lone developer hacked together last year. The goal of the project looked simple, focused, valuable: real code completion in Emacs for C# !!! Whoohoo!!!!! but
- The implementation looks incomplete
- There are no docs
- I couldn't even figure out how to initially install it
- nobody is using it; there were 33 downloads and I think I was about 8 of them.
- I couldn't figure out how to configure it or what the various vars did, without wading in knee deep into elisp code.
- after bumping around in the dark, I did get a popup to show a class definnition when I hovered on XmlReader, for example
- But when I tried to get the code-completion to work, I consistently got the result that my editing buffer would just silently close. (I guess I didn't want to edit that file anyway.)
- It appears to be, as someone else said, "abandonware"
So the search continues. Real code completion looks to be pretty hard to get, and not easy to implement.
I think the next thing I may do is check out CSDE.
Jeez I hope I don't start considering implementing this meself. That would be a disaster. Somebody stop me.