public override void OnRender(Media.DrawingContext dc)
{
int width = this._renderWidth;
int height = this._renderHeight;
if (_direction == Direction.TopToBottom)
{
dc.DrawLine(Stroke, 0, 0, width - 1, height - 1);
}
else
{
dc.DrawLine(Stroke, 0, height - 1, width - 1, 0);
}
}
