c# - Cookie expiry date not set -

here get:

protected string identifier {         {         httpcookie cookie = request.cookies[identifier_cookie];          if (cookie != null)         {             return cookie.value;         }         else         {             cookie = new httpcookie(identifier_cookie);             cookie.value = guid.newguid().tostring();             cookie.expires = datetime.now.addyears(1);             response.cookies.add(cookie);              return cookie.value;         }     } } 

when running project locally, cookie's expiry date set expected

but when run live, cookie's expiry date when browsing session ends.

what doing wrong?

before doing else, suggest clear cache , cookies.

protected string identifier {         {         httpcookie cookie = request.cookies[identifier_cookie];          if (!cookie)         {             cookie = new httpcookie(identifier_cookie);             cookie.value = guid.newguid().tostring();         }cookie.expires = datetime.now.addyears(1);         response.cookies.set(cookie);          return cookie.value     } }