Genghis is a set of extensions built on top of .NET and integrated with WinForms to provide application-level services in the same flavor as the Microsoft Foundation Classes. Genghis gets its name as the functional heir to Attila, a similar set of functionality built on top of ATL.
Please see
http://www.genghisgroup.com for more information.
The current build (0.8) includes a full reconciliation with features that existed in the .NET 1.x version.