wpf只运行一个实例

在winform下，只运行一个实例只需这样就可以：

1．首先要添加如下的namespace：

using System.Threading;

2．修改系统Main函数，大致如下：

bool bCreatedNew;

//Create a new mutex using specific mutex name

Mutex m =new Mutex( false, "myUniqueName", out bCreatedNew );

if( bCreatedNew )

Application.Run(new yourFormName());

在wpf中如何做呢？

我在微软论坛发帖之后，有高手提出了如下的解决办法，我试验之后，此法可行，就贴出来和大家分享。有人还有其他解决办法，可以写出来一起探讨：

首先 引用Microsoft.VisualBasic
然后新建一个类 single
   public  class single:Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase
    {
       App a;
       public single()
       {
           this.IsSingleInstance = true;
       }
       protected override bool OnStartup(Microsoft.VisualBasic.ApplicationServices.StartupEventArgs eventArgs)
       {
           a = new App();
           a.InitializeComponent();
           a.Run();
           return false;
       }
       protected override void OnStartupNextInstance(Microsoft.VisualBasic.ApplicationServices.StartupNextInstanceEventArgs eventArgs)
       {
           base.OnStartupNextInstance(eventArgs);
           a.activate();
       }
    }

app.cs
    public partial class App : Application
    {
        protected override void OnStartup(StartupEventArgs e)
        {
            base.OnStartup(e);
            Window1 w = new Window1();
            w.Show();
        }
        public void activate()
        {
            MainWindow.Activate();
        }
        private void Application_SessionEnding(object sender, SessionEndingCancelEventArgs e)
        {
        
        }
        private void Application_Startup(object sender, StartupEventArgs e)
        {
          
        }
        private void Application_Exit(object sender, ExitEventArgs e)
        {
    
        }
    }
app.g.cs
        [System.STAThreadAttribute()]
        [System.Diagnostics.DebuggerNonUserCodeAttribute()]
        public static void Main(string [] a ) {
            single s = new single();
            s.Run(a);   
        }