XNA

I bought an XBox this weekend and built a project in XNA. XNA is Microsoft's game development system for both Windows and XBox. Since it's easier to build on the Windows box I spent most of my time writing the application there, with full access to the .NET stack. I then went to move it over to the XBox to find that the XBox only supports a very small subset of the .NET stack, excluding, most particularly any direct access to networking. This is probably a security measure to avoid viruses on the box.