Find the Html Link in html file

If you are open to use tool, HTMLAgilityPack is the right tool, I would say. It is open-source, free and pretty versatile.

http://htmlagilitypack.codeplex.com/[^]

A simple snippet

HtmlWeb hw = new HtmlWeb();
 HtmlDocument htmlDoc = hw.Load("www.yoursite.com/default.aspx);
 foreach(HtmlNode eachLink in htmlDoc.DocumentElement.SelectNodes("//a[@href]"))
 {

 }

If you want to write your own tool, I would suggest to have a look at http://www.dotnetperls.com/scraping-html[^]

Though, this is just begining and you may face lots of issues if you are trying to scrap other sites as the internet is full of badly written sites :-(

Hope that helps. If it does, mark the answer /upvote.

Thanks
Milind