Are there any Controls to show the nephogram?

I want to show the nephogram like the above which show the many-to-many relationships of objects.

Are there any free Controls? Or, mayb开发者_Python百科e some suggestion? Thanks a lot!

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I have used Graphviz for similar problems.

Graphviz can create an images similar to the one in your post which you can display to the user in a picturebox.