Our problem is we are able to clear session on logout.
But if a user clicks the back button then he/she can go through all previous screens.
But the advantag
write this code in master page in page load event
Response.Cache.SetCacheability(HttpCacheability.NoCache); Response.Cache.SetExpires(DateTime.UtcNow.AddHours(-1)); Response.Cache.SetNoStore();
and write this code in Login page in head section