title: Protecting source code from theft during development
body: <p>Is there any way to protect my code during development so that if a developer leaves my company they are unable to access files in my project? </p>
  
  <p>This is especially important with TFS where the project is downloaded locally, cached, and available for offline use.  Ideally the code would be unreadable if they did not have a valid Active Directory user ID.</p>
  
  <p>Even if this idea is not possible, I'd like to learn of any practical deterrent you can think of...</p>