public ScrollBarsRenderRule()
        {
            Horizontal = new HorizontalScrollBarRenderRule();
            Vertical = new VerticalScrollBarRenderRule();

            BarDirection = Direction.None;
        }
        public ScrollBarsRenderRule()
        {
            IsBuilt = false;

            Horizontal = new HorizontalScrollBarRenderRule();
            Vertical   = new VerticalScrollBarRenderRule();

            BarDirection = Direction.None;
        }