Free or open source Diagram component for C#?

Question

Is there any Diagramming component that is freely available for a C# project? If possible one that allows you to click and edit the diagram nodes.

Answer 1

Well, here is the beginning of one.

Answer 2

Well I don't know if you are looking to model just some basic logic steps, or get really in depth and model classes and functions themselves. But, for most design work I do, and this include diagrams, I like to use ArgoUML. It's free, and pretty powerful, though you do have to understand UML, but otherwise I think it is a great tool.