Log on and browse a website programatically

I need some .NET code that will log on a PHP website using a username and password. The URL is similar to: <[login to view URL]>. The website stores the user/pw information in "Session", and also stores some cookies on the client. Then, my script will need to go to another page while maintaining the "logged on" state) to perform the required action. Once logged in, I will need to get the HTML source of a page similar to <[login to view URL]> I will do the rest. Should all be wrapped up in a class for easy use by my actual application. Thanks! ## Deliverables 1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. 2) Installation package that will install the software (in ready-to-run condition) on the platform(s) specified in this bid request. 3) Complete ownership and distribution copyrights to all work purchased. ## Platform C# or VB.NET