COOKIE的问题

Question

DateTime now=DateTime.Now;
HttpCookie cookie = new HttpCookie("AE");
cookie.Values.Add("username","");
cookie.Values.Add("user_type","");
cookie.Expires=now.AddMinutes(0);
Response.AppendCookie(cookie);

Answer 1

原理是重新设定Cookie的时间为0

Answer 2

我用以下来去
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HttpCookie Cookieuserinfo = Request.Cookies["Mycookie"];
Response.Cookies .Clear ();
FormsAuthentication.SignOut ();   //清除所用 COOKIES 和 身份验证
Response.Redirect("default.aspx");
这句
HttpCookie Cookieuserinfo = Request.Cookies["Mycookie"];
是不是可以不要