private void shapeDuplicateBT_Click(object sender, EventArgs e)
        {
            if (listBox1.SelectedItems.Count > 0)
            {
                string areaText = "";

                List <Area> selectedAreas = new List <Area>();
                foreach (object areaObj in listBox1.SelectedItems)
                {
                    Area area = areaObj as Area;
                    if (!area.IsSubComponent)
                    {
                        AreaMapComponent.Duplicate(area);
                    }
                }
                RefreshListBox();
            }
        }