This property is obsolete. Use the MenuAppearance.Menu property of a BarAndDockingController's BarManagerAppearances.SubMenu object to specify default style settings for subitems within menus. This property affects submenus belonging to the BarManagers which are bound to this BarAndDockingController.
It is also possible to override the default style settings for particular menus. For this purpose, use BarCustomContainerItem.MenuAppearance and PopupMenu.MenuAppearance properties for container items and popup menus respectively.