请教.net怎么设置某一个cookie的保存时间,和销毁

Question

比方"aa"
我想保存30天"bb"我想用一下就销毁.怎么做呢

Answer 1

string aa = "30天";
        Response.Cookies["xxx"].Value = aa;
        Response.Cookies["xxx"].Expires.AddDays(30);

Answer 2

Response.Cookies["..."].Expires = DateTime.Now.AddSeconds(-1);

Answer 3

Response.Cookies[""].Expires.AddDays(30);

Answer 4

Response.Cookies["..."].Expires = DateTime.Now.AddSeconds(-1);

Answer 5

Cookies.Expires小于当前时间就行 
比如写 1985 1986等

Answer 6

设置过期时间:Response.Cookies["aa"].Expires = DateTime.Now.AddDays(30);
销毁Cookies:Response.Cookies.Remove("aa");