//写Cookie
HttpCookie cookie=new HttpCookie(key,value);
Response.Cookies.Add(cookie);
//获取Cookie
HttpCookieCollection cookies=Request.Cookies;
string cookies_Key=cookies[i].Name;
string cookies_Value=cookies[i].Valus;
原文：https://www.cnblogs.com/qiupiaohujie/p/11962519.html