A good 2D-primitive rendering library for C#/.NET?

I'm开发者_开发百科 developing a C#/.NET application (Winforms/WPF, not entirely decided yet) which needs to display simple diagrams: boxes/"text boxes", lines/arrows, circles, text etc... Some items on the diagram need to be clickable/selectable, allowing me to display e.g. a dialog for filling in data on the selected item. I guess the diagram display could all be done from scratch using e.g. GDI+, but before going down that path I would like to ask for input/suggestions on existing libraries to use (commercial or free)?

I've already tried to google for suitable libraries, but found mostly 2D game-engines or "graph/chart"-rendering libraries. Neither seem to fit my requirements.

Best regards,

Søren

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Even if you said you looked already into "graph/chart" libraries. What about Nevron Diagram? The only drawback would be that it is not free, but it doesn't cost that much.

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I have used Piccolo2D for Java, but they aslo have a .Net version, and it's community driven.

The only problem is, I don't know how updated the .Net version is or give any comment on how well it works (.Net version).