Pie Charts with Overlays
I’m not sure why I concentrate on Pie Charts. Maybe circles are just more attractive to me than bars or points
For the January 2009 Expression Newsletter (which will be out in a week or two), I put together a rather deep article on styling pie charts in the Silverlight Toolkit. At the end, I mentioned to check here for info on overlays.
One effect you can achieve with an overlay, is a glassy effect:

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Pete Brown’s Blog.

