Run only one instance of a program in C#

This example shows you how to ensure that only one instance of an application is running. // Ensure only one instance of this application is running. bool alone = false; Mutex m = new Mutex(true, "<name>", out alone);   if (!alone) { Console.WriteLine("Another instance is already running."); Console.ReadKey(); return; }   Console.WriteLine("Running…\n"); Console.ReadKey();   // [...]