Yes, it uses C#.
>That looks promising, but does it use C#?
>
>The demo utilizes several technologies including: IIS7, ASP.NET Ajax Extensions, Linq, Windows Communication Foundation, Windows Workflow Foundation, Windows Presentation Foundation, Windows Powershell, and the .NET Compact Framework.
>
Craig Berntson
MCSD, Microsoft .Net MVP, Grape City Community Influencer