public ClientLocation()
 {
     InitializeComponent();
     frmClientLocation = this;
 }
 private void tsmClientLocation_Click(object sender, RoutedEventArgs e)
 {
     if (ClientLocation.frmClientLocation == null)
     {
         ClientLocation frmClientLocation = new ClientLocation();
         frmClientLocation.Topmost = true;
         frmClientLocation.Show();
     }
     else
     {
         ClientLocation.frmClientLocation.txtOldLocation.Text = SCClient.ClientInstallaionOldVersionFileFromRegistry;
         ClientLocation.frmClientLocation.txtNewLocation.Text = SCClient.ClientInstallaionNewVersionFileFromRegistry;
         ClientLocation.frmClientLocation.Topmost = true;
         ClientLocation.frmClientLocation.Show();
     }
 }