What are the 'Client Profile' versions of .net framework 3.5 and 4 in Visual Studio 2010?

Question

I don't know the differences between 3.5 and 3.5 Client Profile, same for 4.

So, what's up with that?

Answer 1

From MSDN:

The .NET Framework 4 Client Profile is a subset of the .NET Framework 4 that is optimized for client applications.

It is usful when you need to redistribute the framework with your application (for example click-once):

Applications that target the .NET Framework 4 Client Profile typically improve the deployment experience by having smaller download sizes and quicker install times. An application that targets the .NET Framework 4 Client Profile has a smaller redistribution package that installs the minimum set of client assemblies on the user's computer, without requiring the full version of the .NET Framework 4 to be present.