Microsoft.Msagl.GraphViewerGdi.GViewer.CreateEdgeWithGivenGeometry() is losing Label

Microsoft.Msagl.GraphViewerGdi.GViewer.CreateEdgeWithGivenGeometry(DrawingEdge drawingEdge) { drawingEdge.Label = new Label(); (...)

This makes us lose the Label.Text passed. I've corrected it:

    public IViewerEdge CreateEdgeWithGivenGeometry(DrawingEdge drawingEdge)
    {
        //ADAC: protect parameter Label 
        if (drawingEdge.Label == null)
            drawingEdge.Label = new Label();
        Edge geometryEdge = drawingEdge.GeometryEdge;
        Debug.Assert(geometryEdge != null);
        geometryEdge.GeometryParent = Graph.GeometryGraph;

        var dEdge = new DEdge(DGraph.FindDNode(drawingEdge.SourceNode.Id), DGraph.FindDNode(drawingEdge.TargetNode.Id),
                              drawingEdge, ConnectionToGraph.Disconnected, this);
        //ADAC: use parameter Label
        //dEdge.Label = new DLabel(dEdge, new Label(), this);
        dEdge.Label = new DLabel(dEdge, drawingEdge.Label, this);
        return dEdge;
    }

but when using:

                    Microsoft.Msagl.Drawing.Edge dEdge = this.fGViewer.AddEdge(nodeFound.Node, node1, false);
                    dEdge.LabelText = ete.LabelText;
                    dEdge.Attr.Color = ete.Color;
                    dEdge.UserData = ete.UserData;
                    //(...)
                    if (OnEdgeAdding != null)
                        OnEdgeAdding(dEdge);

                    fGViewer.CreateEdgeWithGivenGeometry(dEdge);
                    fGViewer.SetEdgeLabel(dEdge, dEdge.Label);

The edge is created but the label is still not present.
Well, I'll have to really study the code to be able to use it. Its object hierarchy is not easy...

Start with GViewer.CreateEdgeWithGivenGeometry(DrawingEdge) and trace the shown AddEdge, CreateEdgeWithGivenGeometry, and SetEdgeLabel call sequence. Inspect how drawingEdge.Label, LabelText, and the created edge's label are propagated; done means the label text passed to AddEdge remains present on the created edge.