WPF单例运行

在App.xaml中使用mutex:

        private Mutex mutex = new Mutex(true, "My Singleton Instance");
        protected override void OnStartup(StartupEventArgs e)
        {
            //单例
            if (mutex.WaitOne(TimeSpan.Zero, true))
            {             
                base.OnStartup(e);
            }
            else
            {
                Shutdown();
            }
        }