Fires when an element is added to the overflow items. The overflow items include the elements hidden from the toolbar strip due to lack of available space. (Inherited from C1.WPF.Toolbar.C1ToolbarStrip)
Fires when an element is removed from the overflow items. The overflow items include the elements hidden from the toolbar strip due to lack of available space. (Inherited from C1.WPF.Toolbar.C1ToolbarStrip)