Search w/ASP.NET

I'd like to work on building a little search engine using ASP.NET. I thought I remembered seeing an article on it somewhere, but can't seem to find it anymore. Anyone know where it is?
The steps I think I'll need to follow in order to design a search engine are:
1. Index Pages.
2. Follow Links.
3. Search Resulting Database.
The third step isn't hard - I think I can do the whole searching process as it will just be SQL SELECT * WHERE name="tom" etc to start. What I don't know how to do is
(1)Make code that goes to a page (say webwiz.net) and grabs the pages and indexes them into the database or how to
(2)Get the code (spider) to follow links on the page to other sites.
Help in this matter would be appreciated. :-)
David.

btw There is another solution in .NET called NATA1 http://www.nata1.com/ it looks pretty stable and accurate but I have never used it so I can't comment on it.