Which method is preferred? Session.Remove("foo"); Session["foo"] = null; Is there a difference?

I have created a class file in the App_Code folder in my application. I have a session variable Session["loginId"] I want to access this session variables in my class, but when I am writing the following line then it gives error Session["loginId"] ...

I have created a class file in the App_Code folder in my application. I have a session variable Session["loginId"] I want to access this session variables in my class, but when I am writing the following line then it gives error Session["loginId"] ...

Without routing, HttpContext.Current.Session is there so I know that the StateServer is working. When I route my requests, HttpContext.Current.Session is null in the routed page. I am using .NET 3.5 sp1 on IIS 7.0, without the MVC previews. It appears tha...