WPF Enforce only ONE instance of application

Question

How do I allow only one instance of a WPF application to run?

Thanks.

Answer 1

Check out this solution: Allowing only one instance of a WPF application to execute

This not only enforces one instance of an application, but it also gives your current application focus when an additional instance of an application is ran. My mutex solution to restricting one instance is actually different from the above link, but I liked the "focus" element to this solution.