Is there an async version of DirectoryInfo.GetFiles / Directory.GetDirectories in dotNet?

Question

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 ver

Answer 1

I am no F# programmer, but I'd do this in C#:

static IEnumerable IterateFiles(string path, string pattern) {
    var entryQueue = new Queue();
    entryQueue.Enqueue(path);

    while (entryQueue.Count > 0) {
        var subdirs = Directory.GetDirectories(entryQueue.Peek());
        var files = Directory.GetFiles(entryQueue.Peek(), pattern, SearchOption.TopDirectoryOnly);
        foreach (var file in files)
            yield return file;
        entryQueue.Dequeue();

        foreach(var subdir in subdirs)
            entryQueue.Enqueue(subdir);
    }
}

I'm assuming there's a similar construct to iterators in F#.