Checking Visual Studio code into source control - what do I need to check in?

I have a new project written in Visual Studio 2010, and I have checked all of the code and the project files into our source control system, however checking the code out and doing a build via MSBuild doesn't work in CruiseControl, it looks like there are dependancies that are captured somewhere in a f开发者_运维百科ile that I haven't checkin. Any ideas where these are held, or what am I missing ? Thanks

Update

I think somewhere in the checkin I managed to remove some assemblies (don't ask me how I did it) from the references, so I added these back in, and it all works now. So the answer is to check everything that is checked in!

Thanks for all the suggestions

It was my fault! I managed to delete some assemblies from the references