Add service reference to Amazon service fails

Add service reference to Amazon service fails, saying "Could not load file or assembly "System.Core, Version=3.5.0.0,...' or one or more of it dependencies. The module was expected to contain an assembly manifest."

This is in VS 2008, haven't installed SP1 on this machine yet. Any ideas?

From stackoverflow Eric Haskins

• This can happen if ASP.NET isn't installed. Go to Add/Remove Windows Components and look under IIS; make sure that ASP.NET is checked (meaning that it's installed.) That should clear up your problem!

  From Daniel Jennings

• ASP.net appears to be installed, but it seems to be corrupted. My guess is that if I install .net SP1, or reinstall .net, it will correct this issue, but I'm not going to do that tonight.

  From Eric Haskins