Microsoft.Windows.Controls.Ribbon.RibbonSeparator.OnPropertyChanged C# (CSharp) Method

        protected override void OnPropertyChanged(DependencyPropertyChangedEventArgs e)
        {
            base.OnPropertyChanged(e);

            // See OnVisualParentChanged method for the elaborate explanation.
            // In a gist this is a hack to capture a reference to the
            // PrivateSharedSizeScopeProperty.

            if (_privateSharedSizeScopeProperty == null &&
                e.Property.OwnerType == typeof(DefinitionBase) &&
                e.Property.Name == "PrivateSharedSizeScope")
            {
                _privateSharedSizeScopeProperty = e.Property;
            }
        }