I am trying to build a small ASP.NET MVC 2 application.I have a controller class with the below method in it

  public ActionResult Index()
    {
        TestMvc.Models.PersonalInformation objPerson = new TestMvc.Models.PersonalInformation();
        objPerson.FirstName = "Shyju";
        objPerson.LastName = "K";
        objPerson.EmailId="[email protected]";
        return View(objPerson);
    }

And when the page (View) being called, i can see this data there as my view has these data's displaying. Now i want to know how can i pass a query string in the url and use that id to build the PersonalInformation object.Hoe can i read the querystring value ? Where to read ?

I want the quesrtstring to be like http://www.sitename/user/4234 where 4234 is the user id