Avoid Running of Multiple Instances of application

            Application.EnableVisualStyles();

            Application.SetCompatibleTextRenderingDefault(false);

             

            Application.EnableVisualStyles();

            Application.SetCompatibleTextRenderingDefault(false);

            bool ok;

            System.Threading.Mutex m = new System.Threading.Mutex(true, "Tool Name", out ok);

            if (!ok)

            {

                MessageBox.Show("Another instance is already running.", "Tool Name");

                return;

            }

            // Do some stuff here...

            Application.Run(new ToolName());

            GC.KeepAlive(m);