force a page load on browser back button in c#

I have a webpage http://www.practicelifeintheuktest.co.uk/life-in-the-uk-free-sample-test.aspx  for a quiz test. When user finishes the test and goes to result page and clicks on the browser back button. The page_load event does not fire and session variables which are set in page load are not set and the page does not behave correctly. How can we force page load when user clicks the back button. I have tried a couple of possible solutions like setting the no cache properties but it does not seem to work on this case.

Response.Buffer = true;
Response.ExpiresAbsolute = DateTime.Now.AddDays( - 1);
Response.Expires = 0;
Response.CacheControl = "no-cache";

and

Response.Cache.SetCacheability(HttpCacheability.NoCache);
mmalik15Asked:
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Dave BaldwinFixer of ProblemsCommented:
Unless you are using javascript/AJAX to load the page, clicking on 'Back' does not contact the server, it just displays from the history cache in the browser which is not the same as checking 'cache' when a new link is clicked.  All the things you listed above are only run on the server and never seen when 'Back' is clicked.
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mmalik15Author Commented:
thanks for the comment but any suggestion how to handle the back button in this case
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Dave BaldwinFixer of ProblemsCommented:
You can't 'handle' the back button from the server because the server isn't involved.  Only if you do your page load with javascript / AJAX can you reload anything from the server.

What happens if you refresh the page after clicking on 'Back'?
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