private void ShowPNAForm()
 {
     if (detailsForm == null)
     {
         detailsForm = new PNA();
         //detailsForm.Closed += detailsForm_Closed; // avoid reshowing a disposed form
         detailsForm.Show();
     }
     else { detailsForm.Activate(); }
 }
 private void ShowPNAForm()
 {
     if (detailsForm == null)
     {
         detailsForm = new PNA();
         //detailsForm.Closed += detailsForm_Closed; // avoid reshowing a disposed form
         detailsForm.Show();
     }
     else
     {
         detailsForm.Activate();
     }
 }