I don't speak LigthSwitch. From what I've seen, I'm sure the answer to your question is "No". But as I don't speak LigthSwitch, I couldn't fill you in on any details. So instead, I'll post you a blog link, where I think you'll be able to find the answer to your question and a lot of other LigthSwitch information. Jan Van Der Haegen has a LigthSwitch blog and he seems to know what he's writing about:
http://janvanderhaegen.wordpress.com/ Finally, I must question your statement that it's seeing generated C#-code that makes it possible to customize. From the little I know about LigthSwitch - it's NOT seeing C#-code that makes it easy to build and customize apps...
LightSwitch is extremely powerful and extensible. You should check this link with the how-to videos at the bottom to get a feel of it:
http://msdn.microsoft.com/en-us/vstudio/gg604823.aspx And LightSwitch VS Solution Explorer offers 2 types of views: Logical and File. You should choose File View if you want to see the typical source files, folders etc.