.NET Framework 4.6 and 4.5
This member overrides FrameworkElement.OnPropertyChanged(DependencyPropertyChangedEventArgs), and more complete documentation might be available in that topic.
Invoked whenever the effective value of any dependency property on this RibbonSeparator has been updated. The specific dependency property that changed is reported in the arguments parameter.
Assembly: System.Windows.Controls.Ribbon (in System.Windows.Controls.Ribbon.dll)