http://www.google.com/search?q=shopping+cart+asp.net+C%23
First hit for a codeproject one with source. Interesting, but I've not seen it before. Second hit for the one I was thinking of: The old Duwamish 7.0 from VS 2003. Good place to get started to think about it. Personally, I wouldn't want to build a shopping card in ASP.NET; I think other technologies scale better for this. :) But, it's working out there in the World, so, good luck with it. :) I'll step aside now and let people reply who actually interface with the consumer with their code. :)
