Question

I have one button on page, page name abc.aspx . when user click on that button
it should redirect to finishwork.aspx page.

After finishwork.aspx page user must not go back to abc.aspx page. when user press back button in browser, he should be redirect to workallreadyfinish.aspx page

Answer 1

Disable caching on that pages and avoid caching the page.

Response.Cache.SetExpires(DateTime.UtcNow.AddMinutes(-1));
Response.Cache.SetCacheability(HttpCacheability.NoCache);
Response.Cache.SetNoStore();