Check out Windows® API Code Pack for Microsoft® .NET Framework (v0.85)!!
Cope and pasted summary:-
The Windows® API Code Pack for Microsoft® .NET Framework provides a source code library that can be used to access new Windows 7 features (and some related Windows Vista features) from managed code. These features are not available to developers today in the .NET Framework. The features included in this version (v0.85) of the library are: