/// <summary>
/// SortOrderProperty property changed handler.
/// </summary>
/// <param name="d">CategoryAxis that changed its SortOrder.</param>
/// <param name="e">Event arguments.</param>
private static void OnSortOrderPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
CategoryAxis source = (CategoryAxis)d;
source.OnSortOrderPropertyChanged();
}
