HtmlWeb webClient = new HtmlWeb();
HtmlDocument doc = webClient.Load("http://xxx");

HtmlNodeCollection hrefList = doc.DocumentNode.SelectNodes(".//a[@href]");

if (hrefList != null)
{
     foreach (HtmlNode href in hrefList)
     {
        HtmlAttribute att = href.Attributes["href"];
        doSomething(att.Value);

     }

}


//csharp/6277