title: Where can I put my source files?
body: <p>I am developing a web form using Visual Web Developer
  Currently I have class source files in the same directory as the web form, or in the App_Code folder. I'd like to organise the files into folders within the web form folder, but I can't find a way of adding a reference to the folders, and they don't seem to be being picked up automatically.
  These are files that are under constant development.</p>
  
  <p>What is the asp.net/c#'s equivalent concept to c++'s #include?</p>
  
  <p>This is a <em>Web Site</em> rather than a <em>Web Application</em></p>