private static void OnNotifyGalleryItemTemplateOrStylePropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
RibbonGallery gallery = (RibbonGallery)d;
for (int index = 0; index < gallery.Items.Count; index++)
{
RibbonGalleryCategory category = (RibbonGalleryCategory)gallery.ItemContainerGenerator.ContainerFromIndex(index);
if (category != null)
{
category.NotifyPropertyChanged(e);
}
}
}