Exposing Logged-In User Details In an Application

Whenever we built an application (specifically web based), we require to maintain the information of logged-in user on each page of the application. and typically, we also require to authorize the user before user can access any of the page.

To do so, what I feel is better is creating a base class and then handle everything there, without letting the developers of individual pages to worry about above things.

public class baseClass
{
    public User UserDetails
    {
         get {return (User)session["userDetails"];}
    }
    protected bool AuthorizeUser()
    {
        //Authorize user here
    }
    protected bool AuthenticateUser()
    {
        //Authenticate user and put the authenticated user details in the session object
        //which can be used later
    }
}