Ceritification for .net 3.5?

Question

I have decided to give microsoft MCTS[70-536] ceritication exam for .NET 3.5.

But would this certification have any value cuz there have been so many new things in .net since 3.5!

I have selected this [70-536] exam cuz it covers the basics of .net platform.
.net 4.0 certification not only covers .NET 4.0 basics but also specific [WinForms,WPF....] technologies.

Should i continue with this .net 3.5 certification or with .net 4.0?
What is your opinion!