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

Unfortunately this cannot be done once dll has been created. For this you need to have source of your class library.

• Select Properties from Right clicking on the project in the solution explorer.

• In Application Tab change Target Framework to Desired one.