protected override void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e)
{
base.OnElementPropertyChanged(sender, e);
if (updatePropertyNames.Contains(e.PropertyName))
{
BorderRendererVisual.UpdateBackground(Element, this);
}
}
protected override void OnElementChanged(ElementChangedEventArgs <BorderView> e)
{
base.OnElementChanged(e);
if (null == e.NewElement)
{
return;
}
BorderRendererVisual.UpdateBackground(Element, this);
}