title: List all files and directories in a directory + subdirectories
body: <p>I want to list every file and directory contained in a directory and subdirectories of that directory. If I chose C:\ as the directory, the program would get every name of every file and folder on the hard drive that it had access to.</p>
  
  <p>A list might look like</p>
  
  <pre>
  fd\1.txt
  fd\2.txt
  fd\a\
  fd\b\
  fd\a\1.txt
  fd\a\2.txt
  fd\a\a\
  fd\a\b\
  fd\b\1.txt
  fd\b\2.txt
  fd\b\a
  fd\b\b
  fd\a\a\1.txt
  fd\a\a\a\
  fd\a\b\1.txt
  fd\a\b\a
  fd\b\a\1.txt
  fd\b\a\a\
  fd\b\b\1.txt
  fd\b\b\a
  </pre>