private void ShowPingForm()
 {
     if (pingForm != null)
     {
         pingForm.Activate();
     }
     else
     {
         pingForm = new PingForm(controller);
         pingForm.Show();
         pingForm.FormClosed += pingForm_FormClosed;
     }
 }
 private void ShowPingForm()
 {
     if (pingForm != null)
     {
         pingForm.Activate();
     }
     else
     {
         pingForm = new PingForm(controller);
         pingForm.Show();
         pingForm.FormClosed += pingForm_FormClosed;
     }
 }