async method in asp.net 2.0

ScreenScraper screenScraper = new ScreenScraper(fileName); webWriter = new WebWriter(); [login to view URL](webWriter); The above function will collect content from a website and store the results in an arraylist. It will take time to complete (up to 2 minutes). Therefore I need some code that will be able to run the code in async - Every 10 second I will then call the following method using ajax and a timer with the below code: ArrayList partialResult = [login to view URL](); I will then show the partial completed results in the arraylist(the arraylist will grow untill it completes) What I need you to code is an async code model on an asp.net page or from a webservice which runs the above code. It must be possible to get the partial results - returned as an arraylist (called every 10th second) I only need the async code model - all of the other code has already been made