Невозможно установить связь между этими узлами вручную в addflow control в WPF.

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I am developing a piping diagram with nodes and links in WPF.
Am using thord party tool by Lassalle called AddFlow.
http://www.lassalle.com/wpf/tutorial.pdf

My Issue is :
I have to few nodes on my canvas. I had dragged and dropped they are there on Canvas.
I have to establish linking between these nodes manually.
I should be able to drag the link from one node and connect it to the other node
I am unable to do this. As this being a third party tool there is literally no reference document at all except for the above link that I mentioned.


Request your help in this regard. Any quick reference or code is highly appreciated.

Что я уже пробовал:

void CreateDiagram2(AddFlow addflow)
{
 // Create and add the nodes to the diagram
 addflow.AddNode(new Node(50, 50, 80, 80, "First node", addflow));
 addflow.AddNode(new Node(280, 160, 100, 80, "Second node", addflow));
 addflow.AddNode(new Node(50, 210, 80, 80, "Third node", addflow));
 // We use LINQ to select in an array all the nodes of the canvas.
 var nodes = addflow.Items.OfType<Node>().ToArray();
 // Create and add the links to the diagram
 addflow.AddLink(new Link(nodes[0], nodes[1], "link 1", addflow));
 addflow.AddLink(new Link(nodes[1], nodes[1], "link 2", addflow));
 addflow.AddLink(new Link(nodes[1], nodes[2], "link 3", addflow));
 
}

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