WPF单例实现

  protected override void OnStartup(StartupEventArgs e)
 2{
 3    Process process = Process.GetCurrentProcess();
 4
 5    foreach (Process p in Process.GetProcessesByName(process.ProcessName))
 6    {
 7        if (p.Id != process.Id)
 8        {
 9
10            //关闭第二个启动的程序
11
12            MessageBox.Show("您的程序已经启动！");
13
14            Application.Current.Shutdown();
15
16            return;
17
18        }
19    }
20    base.OnStartup(e);
21}