SharpMud is a MUD server Framework written for .NET 2.0 in 100% C#. Provides an applcation layer that allows for MUD developers to focus on gameplay, not server mechanics. See the website for more information, including project status and direction.
A C# .net VT/Telnet terminal emulator. The project is still very much in development but the Terminal is quite useable and fairly tolerent. It requires a c# 2 compiler. If anyone has taken this project any further, I'd love to see the results.