Does anyone know how (or if it is possible) to get a directory listing for a given URL?

I thought I had it working using HttpWebRequest and specifying the URL and the parsing the HTML directory listing (yuck) that it returned.

However, if the directory contains a file called say "default.htm", then the HTML contents of that file are returned instead of the HTML directory listing.

Is there a smarter way to aceive my goal?

Note: It's read-only, so I don't want to use FTP with a User Id and Password.