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.
SWAL is a program that can launch as a service (or standalone) and monitor other services and control other programs. Written in C++ and might have some .NET components (planning on a linux port)