graphs / charts in WPF

Anyone know of (or written) any decent tutorials on how to make bar charts and pie charts etc in WPF? I thought this would be a fairly common thing to want to do but a quick google search didnt get me much useful stuff. I found a few that you have to pay for, a few that looked awful, and a few that were like full class libraries you had to download and reference in your project, which is not what I want to do.

I'd love to make some nice 3D ones but I'm guessing that is probably going to be quite tricky so I would settle for 2D :)

Any pointers, links or books much appreciated

Cheers
Chris

I reckon anyone who has actually made 2D/3D graphs that look any good are trying to flog them, roll your own is what I say.

i just came across this http://wpf.amcharts.com/ not sure how it is but a quick look, it says that some features are free. might be worth a look if you havent see it already.

thanks for that I'll check it out :)