Question

protected void Page_Load(object sender, EventArgs e){
    Session.Abandon();
    FormsAuthentication.SignOut();

    Page.Response.Cache.SetCacheability(HttpCacheability.NoCache);
    Response.Redirect("~/Admin/adminLogin.aspx");

}

I m not using any master page.so i have make one logout page and write code in it as above.
But after logout it still goes back to previous page.

Answer 1

You can put this code in the page load

protected void Page_Load(object sender, EventArgs e)
{
    if (!HttpContext.Current.User.Identity.IsAuthenticated)
    {
        Response.Redirect("Login.aspx");
    }
}