C # synchronization between processes to achieve the effect of running only one program

Using System; using System. Threading; using System. Windows. Forms; namespace WindowsFormsApplication1 {static class Program {/// <summary> /// main entry point of the application. /// </Summary> [STAThread] static void Main () {bool createdNew; using (new Mutex (true, Application. productName, out createdNew) {if (createdNew) {Application. enableVisualStyles (); Application. setCompatibleTextRenderingDefault (false); Application. run (new Form1 ();} else {// todo: indicates that the program has been started }}}}}