void DumpHrefs(String inputString) 
    {
        Regex r;
        Match m;

        r = new Regex("href\\s*=\\s*(?:\"(?<1>[^\"]*)\"|(?<1>\\S+))",
            RegexOptions.IgnoreCase|RegexOptions.Compiled);
        for (m = r.Match(inputString); m.Success; m = m.NextMatch()) 
        {
            Console.WriteLine("Found href " + m.Groups[1] + " at " 
                + m.Groups[1].Index);
        }
    }