C# application.restart() in task

I Have this Code Block 

<pre lang="c#">Task.Delay(ts).ContinueWith((x) =>
                {
                    bool updateSuccess = checkUpdate2();
                    if (updateSuccess)
                    {
                        restart();
                    }
                    else
                    {
                        notifyIcon1.ShowBalloonTip(3000, "UPDATE", "No current updates found", ToolTipIcon.Info);
                        Thread.Sleep(3000);
                    }
                });

public void restart()
        {
            try
            {
                this.scannerService.Stop();
                this.travelDocumentScannerService.Stop();
                this.printerService.Stop();
                MessageBox.Show("Servisler Stopped");

                this.mouseThread.Abort();
                MessageBox.Show("Thread closed");

                Thread.Sleep(3000);

                Application.Restart();
            }
            catch (Exception ex)
            {
                var f = ApplicationDeployment.CurrentDeployment.DataDirectory +@"\RestartError.txt";
                var err = "Message :" + ex.Message + "<br/>" + Environment.NewLine + "StackTrace :" + ex.StackTrace +
   "" + Environment.NewLine + "Date :" + DateTime.Now.ToString();
                if (!File.Exists(f))
                {
                    File.WriteAllText(f, err);
                }
                else
                {
                    File.AppendAllText(f, err);
                }
            }
        }

Application.Restart();