partial void CheckBoxCustomPort_Action(Id sender)
 {
     if (ObjectiveCRuntime.CastTo <NSButton>(sender).State == NSCellStateValue.NSOffState)
     {
         textFieldCustomPort.IsEnabled = false;
         textFieldCustomPort.IntValue  = 3389;
     }
     else
     {
         textFieldCustomPort.IsEnabled = true;
     }
 }