internal void RemoveTab(int index, bool disposeClientControl)
            {
                TabPage tab = tabs[index];

                tabs.RemoveAt(index);
                OwnerTabControl.TabRemoved(tab, index, disposeClientControl);
            }
 private void InsertTab(int index, TabPage tab)
 {
     tabs.Insert(index, tab);
     OwnerTabControl.TabInserted(tab, index);
 }