如下代码，传到另外一个域名就获取不到session了

（localhost:12402/Home/Index）

 Session["MemberUser"]=123456;

            string url = "api/Home/GetTop8FileDown";
            string result = CrossJs.DoGet(ApiUrl + url );

public static string DoGet(string url)
        {
            CookieContainer cookieContainer = new CookieContainer();
            string serviceAddress = url;
            HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(serviceAddress);
            request.Method = "GET";
            request.ContentType = "application/json";
            HttpWebResponse response =(HttpWebResponse)request.GetResponse();
            
            
            using (StreamReader dataStream = new StreamReader(response.GetResponseStream()))
            {
                var result = dataStream.ReadToEnd();
                return result;
            }
        }

（localhost:2412/Home/Index）

 public string GetTop8FileDown()
      {
          
                int MemberId = Convert.ToInt32(HttpContext.Current.Session["MemberUser"]);
                var member = (from a in db.ec_Member where a.MemberID == MemberId select a).FirstOrDefault();

　　}

一直获取不到这一个HttpContext.Current.Session["MemberUser"] 。