C# Studio is a simple IDE for a C#/Mono/GTK# developer. It has a standard "project/editor/output" interface (screenshot 1 and screenshot 2).

The latest and greatest version is 0.1. The CVS access and online CVS is also available.

If you have any questions feel free to ask them in C# Studio mailing list (you must be subscribed to post to the list). If you found a bug then filing a bug report is the best way to get it fixed.