/// <summary>
/// FunctionProperty property changed handler.
/// </summary>
/// <param name="d">FunctionSeries that changed its Function.</param>
/// <param name="e">Event arguments.</param>
private static void OnFunctionPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
FunctionSeries source = d as FunctionSeries;
source.Refresh();
}
