I'm working with the ASP.NET Charting Library and I've got it generating a pie chart but I'm having a problem configuring it to generate the pie chart with semi-transparent slices. If you look at the image you'll see what I'm talking about. Of the 4 pie charts the top 2 and the bottom left chart have the pie slice transparency I'm talking about.
Charting Control Image http://www.scottgu.com/blogposts/chart/step2.png
What settings of the chart do I tweak to render the slices with a certain % of transparency?
Try assigning the color of the series to a color with alpha transparency, like so:
Chart1.Series(0).Color = Color.FromArgb(128, 255, 0, 0) //transparent red
Taken from this thread.