OOB 自动更新

public App()
        {
            if (App.Current.InstallState == InstallState.Installed)
               {
                   App.Current.CheckAndDownloadUpdateCompleted += OnCheckAndDownloadUpdateCompleted;
                   App.Current.CheckAndDownloadUpdateAsync();
               }

            this.Startup += this.Application_Startup;
            this.Exit += this.Application_Exit;
            this.UnhandledException += this.Application_UnhandledException;

            InitializeComponent();

            new Login().Show();

        }

 /// <summary>
        /// 自动更新
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void OnCheckAndDownloadUpdateCompleted(object sender, CheckAndDownloadUpdateCompletedEventArgs e)
        {
            if (e.UpdateAvailable && e.Error == null)
             {
                  MessageBox.Show("应用新版本已经下载成功，将在下次启动时生效。");
             }
             else if (e.Error != null)
             {
                 MessageBox.Show("在检测应用更新时, 在"
                                + "出现以下错误信息:"
                                + Environment.NewLine
                               + Environment.NewLine
                               + e.Error.Message);
              }
         }