Help user redirect to secure target page after login and avoid extra navigation

Here's a solution for when the user needs to log in before accessing a secure page. This allows the user to avoid going through the menu system to go to the original page desired. I avoid some kind of error by using the false parameter in the redirect. The querystring of note is ReturnUrl.

    protected void Page_Load(object sender, EventArgs e)
    {            
        if (User.Identity.IsAuthenticated == false)
        {
            Response.Redirect("Login.aspx?ReturnUrl=DesiredPage.aspx", false);
        }
        else
        {
            MembershipUser user = Membership.GetUser().ProviderUserKey.ToString();
        }
    }

RedirectFromLoginPage Method