How do I change the .Net Framework from version 3.5 to version 4.0

Question

I have created a class library in .NET Framework 3.5. Now I want to change the .NET Framework Version to 4.0.

How can I do this?

Answer 1

In Visual Studio 2010:

1. Right-click on your Project
2. Select Properties
3. Select the Compile tab
4. At the bottom, select Advanced Compile Options
5. Change the Target Framework to the desired framework