What is the correct way to create a single-instance WPF application?

Question

Using C# and WPF under .NET (rather than Windows Forms or console), what is the correct way to create an application that can only be run as a single instance?

I kno

Answer 1

You should never use a named mutex to implement a single-instance application (or at least not for production code). Malicious code can easily DoS (Denial of Service) your ass...