Need web crawler for a website

I need a webcrawler for the following site: [login to view URL] I need a c# script that will crawl the above url and get the urls of jobs posted there. If there are 500 jobs posted, I need the link to each of the jobs. I want source code for this work in C#. You must not use any third part components other than open source items which have source easily available. I will review the source code and if it works, you will get paid immediately. Extra $50 for high quality code that can be modularized and reused.