public static void SetItemsRibbonLinePlacement(TabControl tabControl, RibbonLinePlacement value)
 {
     tabControl.SetValue(ItemsRibbonLinePlacementProperty, value);
 }
 public static void SetRibbonLinePlacement(TabItem tabItem, RibbonLinePlacement value)
 {
     tabItem.SetValue(RibbonLinePlacementProperty, value);
 }