Sometimes things goes wrong and you do not know what to do. Your Visual Studio is not loading or failing loading some components. It happened to me many times and there was always some trick how to fix it. If you are experiencing problems, probably due to some Visual Studio dependency like template or component, that is displayed on your designer toolbox, there is simple hack how repair it. Just run Visual Studio from command prompt with following arguments:

devenv /resetskippkgs

If you are so poor that you have to write CAML (it has nothing to do with CAML programming language) by your hand you appreciated to have an IntelliSense for that. MSDN Library can help you with VS.NET configuration.