Response.Cache.SetCacheability（HttpCacheability.NoCache）;
 

I have an ASP.NET application using Forms Authentication. When the user clicks the Sign Out button on the page it runs the following code.

        FormsAuthentication.SignOut();
        Response.Expires = 0;
        Response.Cache.SetNoStore();
        Response.AppendHeader("Pragma", "no-cache");

However the user can still just press the back arrow and see the previous page without needing to log in again. I am sure it has something to do with the previous page being cached. How can I make sure they are prompted to log in again with going back?

Response.Cache.SetCacheability(HttpCacheability.NoCache);