版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/jsyhello/article/details/7411898

    public partial class App : Application

    {

        System.Threading.Mutex mutex;

        public App()

        {

            this.Startup += new StartupEventHandler(App_Startup);

        }

        void App_Startup(object sender, StartupEventArgs e)

        {

            bool ret;

            mutex = new System.Threading.Mutex(true, "WpfMuerterrrterterttex", out ret);

            if (!ret)

            {

                MessageBox.Show("Program has started, you can't start again!");

                Environment.Exit(0);

            }

        }

    }

感谢：http://www.cnblogs.com/xiaokang088/archive/2011/03/29/1998710.html

 

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