Links Fetching Application for Given Urls (C#)

-App is made in C#, -Must be fully multi-threaded. -So basically I need to insert a list of target URLS easily, like with copy paste. program or script will then retrieve all links found on msn, yahoo and all the web for every given url , IN EXAMPLE Program will search for a string in the search engines. This string will be a command unique to each engine with url of one of the website urls on the list, something like this "links:http://www.example.com", so this search string retrieves all links found on a search engine for that given url. In search engines the results are shown in the following format: The title of the found resource. (highlighted in blue) The resource description (highlighted in black) The resource URL address (highlighted in green) In example of [login to view URL] Program will get something like this: [login to view URL] [login to view URL] etc.. So i need the resource URL address of all results found to be stored in .txt files automatically (after searching for links is over), named by given url. I.E. "www.example-url.com.txt". So for [login to view URL] we could have: [login to view URL] { 1-1010 urls } [login to view URL] { 1-1010 urls} [login to view URL] { 1-250 urls} Because links results number is limited for each search engine. The [login to view URL] search engine shows only 25 results pages (250 results links). -After finished task it will automatically export all found links for an url to a .txt file named by that url.