public bool Show()
 {
     IsClosed          = false;
     _Form             = new TExtention06aView();
     _Form.DataContext = this;
     _Form.Closing    += _Form_Closing;
     return(_Form.ShowDialog() ?? false);
 }
 public void Close()
 {
     try
     {
         _Form.DialogResult = true;
         if (!IsClosed)
         {
             _Form?.Close();
         }
         _Form = null;
     }
     catch  {
     }
 }