c#检查启动的程序是否已经在运行

记录一下，或许能够使用到

　　　private static void CheckRunning()

        {
            bool newMutexCreated = true;
            using (new Mutex(true, Assembly.GetExecutingAssembly().FullName, out newMutexCreated))
            {
                if (!newMutexCreated)
                {
                    MessageBox.Show("该程序已经被运行");
                    return;
                }
            }
        }