Wait until file is unlocked in .NET

Starting from Eric’s answer, I included some improvements to make the code far more compact and reusable. Hope it’s useful.

FileStream WaitForFile (string fullPath, FileMode mode, FileAccess access, FileShare share)
{
    for (int numTries = 0; numTries < 10; numTries++) {
        FileStream fs = null;
        try {
            fs = new FileStream (fullPath, mode, access, share);
            return fs;
        }
        catch (IOException) {
            if (fs != null) {
                fs.Dispose ();
            }
            Thread.Sleep (50);
        }
    }

    return null;
}