Visual Studio 2008 !!exclusive!!

Enhanced IDE responsiveness during long tasks.

Before VS 2008, your IDE version was locked to a specific .NET version. If you installed VS 2005, you were stuck on .NET 2.0. VS 2008 introduced Multi-Targeting , allowing you to build applications for .NET 2.0, 3.0, or 3.5 without changing IDEs. This was a massive win for teams migrating slowly. visual studio 2008