Continua CI is built for .NET, using NET, and fully supports Continuous Integration for .NET projects.
Continua CI works with .NET 2.0 - 4.5, and includes built in support for Visual Studio, MSBuild, Nant, NuGet, NCover and Open Cover.
Continua CI's developers are .NET people, we understand .NET, we live and breath it!
For even more power, combine Continua CI with FinalBuilder.