static LineGraph() { PointsProperty.OverrideMetadata(typeof(LineGraph), new PropertyMetadata(new PointCollection(), PointsPropertyChangedHandler)); }
set => this.SetValue(PointsProperty, value);
set => SetValue(PointsProperty, value);
get => (NotifyObjectCollection <PointVisualObject>)GetValue(PointsProperty); set => SetValue(PointsProperty, value);