Visual Studio 2008 ("Orcas") and .NET 3.5
Daniel Moth has a bunch of great posts on Visual Studio 2008 and .NET 3.5
Here are two great entry points:
https://www.danielmoth.com/Blog/2007/06/visual-studio-2008-stack.html
https://www.danielmoth.com/Blog/2007/06/net-framework-35.html