asp.net - How to create a non-persistent (in memory) http cookie in C#? -

i want cookie disappear when user closes brower-- i've set promising looking properties, cookies pop live after closing entire browser.

httpcookie cookie = new httpcookie("mycookie", "abc"); cookie.httponly = true; //seems affect script access cookie.secure = true; //seems affect https transport 

what property or method call missing achieve in memory cookie?

this question has been posted online 1000+ times. best way handle non-persistent cookies timeout browser open add key value timeout. code below used log in user id key value , encryption(not included) security browser compatibility. not use forms authentication.

httpcookie cookie = new httpcookie(name); cookie.values["key1"] = value; cookie.values["key2"] = datetime.now.addminutes(70).tostring();                               //timeout 70 minutes browser open cookie.expires = datetime.minvalue; cookie.domain = configurationmanager.appsettings["website_domain"]; system.web.httpcontext.current.response.cookies.add(cookie); 

when checking cookie key value use:

try {  datetime dateexpiredatetime; dateexpiredatetime = datetime.parse(httpcontext.current.request.cookies[name]["key2"]);  if (datetime.now > dateexpiredatetime) { //cookie key value timeout code } else { //reset cookie }  catch { //clear cookie , redirect log in page } 

i have found compatibility issues using forms authentication , google chrome.