Create registration key code developed in WPF / C# VS2012

Question

Hi,

I have a program I created in WPF using C# for the code behind in Visual Studio 2012.  I want to be able to have a program that generates a registration key that must be entered in order for the user to be able to unlock the locked parts of code. Can I do this in Visual Studio or is this another software program that would do it.  I would also be looking for what the code should do to recognize the registration key to unlock the locked features.

Thanks in advance!