Whats your favorite Whidbey feature?

As a C# customer, what are the 3 top C# features that make you excited in Whidbey? An incomplete list of new features can be seen at:

https://msdn.microsoft.com/vcsharp/default.aspx?pull=/library/en-us/dv_vstechart/html/whidbey_csharp_preview.asp

I'm looking forward to your responses!