UberGeekGames just provided me with an version of the Pie Drawing sample, updated to XNA 4.0
You can find it on the sample's page, or download it directly from here.
Enjoy!
This is an archive of my old blog (2008–2013), kept online because people still use it. XNA has been discontinued; MonoGame is its open-source successor, and the techniques still apply. Comments are closed.