//创建cookies
HttpCookie acookie = new HttpCookie("languageForm");
acookie.Value = "en";
acookie.Expires=DateTime.MaxValue;
HttpCookie acookie = new HttpCookie("languageForm");
acookie.Value = "en";
acookie.Expires=DateTime.MaxValue;
Response.Cookies.Add(acookie);
//清理cookies
HttpCookie cookie = new HttpCookie("languageForm");
cookie.Expires = DateTime.Now.AddDays(-30);
Response.Cookies.Add(cookie);