Visual Studio 2010 improves .NET framework multi-targeting by applying framework-appropriate filtering to the property grid and Intellisense.
For example, if you select a button on a web form of a .NET 2.0 web project, in the Property Grid you will see:
If you go to the Project Properties and change the Target Framework version to 4.0:
…the Property Grid display will change to display 4.0-specific properties:
While this looks simple and straight-forward,