If you’ve wanted to get up to date on the new features in C# 4 that is part of Visual Studio 2010, see the set of Whirlwind screencasts on Channel 9.
Whirlwind 9 - Introducing C# 4
The screencasts feature MVP Stuart Celarier and ISV Architect Evangelist Bruce Kyle as he describes six new features in C# 4. Whirlwinds are bite-sized webcasts, generally shorter than 15 minutes. You can start anywhere in the series to learn about the parts you're most interested in.