protected override void UpdateBackground()
{
if (this.Element.IsBackgroundManagedByStyle)
{
this.DisposeDrawableBackground();
this.SetBackground(null);
return;
}
if (this.Element.Background is DrawingBrush drawingBrush)
{
this.drawableBackground = this.UpdateBackground(this.Element, drawingBrush);
}
else
{
base.UpdateBackground();
this.DisposeDrawableBackground();
}
}
private void DisposeDrawableBackground()
{
this.drawableBackground?.Dispose();
this.drawableBackground = null;
}
