Code

if (endNode.IncomingLinks.Count == 2)
{
	var c = endNode.GetCenter();
	var r = endNode.Bounds;

	foreach (var link in endNode.IncomingLinks)
	{
		if (Math.Abs(link.EndPoint.Y - r.Top) < 0.1f)
			continue;
		var nl = link.ControlPoints[link.ControlPoints.Count - 2];
		nl.Y = r.Top - 10;
		link.ControlPoints[link.ControlPoints.Count - 2] = nl;
		link.EndPoint = new PointF(c.X, nl.Y);
		link.ControlPoints.Add(new PointF(c.X, r.Top));
		link.UpdateFromPoints(false, true);
	}
}