private void OnFormClosing(object sender, FormClosingEventArgs e)
 {
     _instance = null;
     _mapControl.MouseMoveEvent -= OnMapMouseMove;
     _mapControl = null;
     global.SaveFormSettings(this);
 }
 public static Grid25CoordinateForm GetInstance(AxMap mapControl, Grid25MajorGrid majorGrid)
 {
     if (_instance == null)
     {
         _instance = new Grid25CoordinateForm(mapControl, majorGrid);
     }
     return(_instance);
 }