How to clear browser cache when user log off in asp.net using c#?

Question

As new in asp.net. In my asp.net application in membership in log off on click event using function ClearSession(), but problem arise

Answer 1

response.setHeader("Cache-Control", "no-cache, no-store, must-revalidate");
response.setHeader("Pragma", "no-cache"); 
response.setDateHeader("Expires", 0); 

These header will only work on pages on which they are included not for all the web application, so either you should add filter which include this header to all pages or you can disable back button.