Hi to all, I am working with DiagramItems within a diagram. Each time I select a DiagramItem the SelectionChanged event should raise. And it works all times but when two DiagramItems overlap and one is selected.  Left clicking over the highlighted edge diselects the selected and selected the other DiagramItem but the event does not raise.

Do you have any idea of what´s going on? How I get to rause the event properly?

SelectionChanged raises  in all cases except when overlapping 2 items and click on the edge of which has been selected previously (has been tested by debug mode)

I don´t understand what you mean with ModificationStart. I work with Visual Studio 2010 not with Flowchart designer (I don´t know if is related). I have tried to add an image of my real problem:

- I select the green item => Raises the event
- Click on the green item edge that overlaps the red item => selects the red item but the event does not raise.

What do you mean with control nodes? I have modified the ModificationStart property to both values and the problem still happens.

Have you tried with the example I provided to you?

The nodes I work with are ShapeNode. I didn´t attach code, I was talking about the image I provided you.