实现单应用程序，即只能启动一个实例

using Prism.Ioc;
using System.Threading;
using System.Windows;
using WpfTestBlankApp.Views;

namespace WpfTestBlankApp
{
    /// <summary>
    /// Interaction logic for App.xaml
    /// </summary>
    public partial class App
    {
        private Mutex m_Mutex;
        protected override Window CreateShell()
        {
            return Container.Resolve<MainWindow>();
        }

        protected override void RegisterTypes(IContainerRegistry containerRegistry)
        {
            containerRegistry.RegisterForNavigation<HolleView>();
        }
        protected override void OnStartup(StartupEventArgs e)
        {//实现单应用程序，即只能启动一个实例
            base.OnStartup(e);
            string mutexName = "MyCompanyName.MyAppName";
            bool createdNew;
            m_Mutex = new Mutex(true, mutexName, out createdNew);
            if (!createdNew)
            {
                Shutdown();
            }
        }


    }
}