Actually, I temporarily forgot (it was in the book :P ) ... you can actually target .NET 4 and still use C# 5 if you use the Async Targeting Pack for Visual Stu

Actually, I temporarily forgot (it was in the book :P ) ... you can actually target .NET 4 and still use C# 5 if you use the Async Targeting Pack for Visual Studio 2012 - http://www.microsoft.com/en-us/download/details.aspx?id=29576 http://www.microsoft.com/en-us/download/details.aspx?id=2957...