title: Is there an async version of DirectoryInfo.GetFiles / Directory.GetDirectories in dotNet?
body: <p>Is there an asynchronous version of DirectoryInfo.GetFiles / Directory.GetDirectories in dotNet?  I'd like to use them in an F# async block, and it'd be nice to have a version that can be called with AsyncCallbacks.  </p>
  
  <p>Problem is I'm trying to suck in a bunch of directories, probably on SMB mounts over slow network connections, and I don't want a bunch of thread pool threads sitting around waiting for network reads when they could be doing other work.</p>