Code

private void Form1_Load(object sender, System.EventArgs e)
{
	List<ShapeNode> nodes = new List<ShapeNode>();
	Random r = new Random();
	for (int i = 0; i < 20; ++ i)
	{
		int t = r.Next(100);
		ShapeNode node = diagram.Factory.CreateShapeNode(0, 0, 10, 10);
		node.Text = t.ToString();
		nodes.Add(node);
	}

	int nodesPerRow = 5;
	nodes.Sort(CompareByText);
	for (int i = 0; i < nodes.Count; ++i)
	{
		//nodes[i].Move(10, i * 20);// arrange in a single column
		nodes[i].Move(i % nodesPerRow * 20, i / nodesPerRow * 20);// arrange in a grid
	}
}

int CompareByText(ShapeNode n1, ShapeNode n2)
{
	int i1 = 0, i2 = 0;
	int.TryParse(n1.Text, out i1);
	int.TryParse(n2.Text, out i2);
	return i1.CompareTo(i2);
}