/// <summary> /// Called when the value of the RatioProperty property changes. /// </summary> /// <param name="d">PieDataPoint that changed its Ratio.</param> /// <param name="e">Event arguments.</param> private static void OnRatioPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e) { PieDataPoint source = (PieDataPoint)d; double oldValue = (double)e.OldValue; double newValue = (double)e.NewValue; source.OnRatioPropertyChanged(oldValue, newValue); }