c# - C# でのプッシュ通知の System.Security.SecurityException

Question

Asp.net Web サービス アプリケーションがあり、Android デバイスにプッシュ通知を送信しています。Web サービスをローカルで実行すると正常に動作しますが、Web ホストで Web サービスを実行しようとすると、次のエラーが発生します。何か案が ？

System.Web.Services.Protocols.SoapException: サーバーは要求を処理できませんでした。---> System.Security.SecurityException: タイプ 'System.Security.Permissions.SecurityPermission, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' のアクセス許可の要求が失敗しました。System.Security.CodeAccessSecurityEngine.Check (オブジェクト要求、StackCrawlMark & stackMark、ブール値 isPermSet) で System.Security.CodeAccessPermission.Demand() で System.Net.ServicePointManager.set_ServerCertificateValidationCallback (RemoteCertificateValidationCallback 値) で BitirmeServis.AndroidGCMPushNotification.SendGCMNotification (文字列 deviceID、 c の文字列メッセージ、Int32 pushCode、文字列 apiKey、文字列 contentTitle、文字列 err):

ここに私のC＃クラスがあります

 public static string SendGCMNotification(string deviceID, string message, int pushCode, string apiKey, string contentTitle, string err)
    {
        //string apiKey = Constants.GCM_BROWSER_API_KEY;
        string postDataContentType = "application/json";
        // contentTitle= Constants.PUSH_CODE_STRS[pushCode]
        string postData =
        "{ \"registration_ids\": [ \"" + deviceID + "\" ], " +
          "\"data\": {\"pushCode\":\"" + pushCode.ToString() + "\", " +
                     "\"contentTitle\":\"" + contentTitle + "\", " +
                     "\"message\": \"" + message + "\"}}";

        ServicePointManager.ServerCertificateValidationCallback += new RemoteCertificateValidationCallback(ValidateServerCertificate);

        //  MESSAGE CONTENT
        byte[] byteArray = Encoding.UTF8.GetBytes(postData);

        //
        //  CREATE REQUEST
        HttpWebRequest Request = null;
        try
        {
            Request = (HttpWebRequest)WebRequest.Create("https://android.googleapis.com/gcm/send");
        }
        catch (Exception ex)
        {
            err = ex.ToString();
            return "error";
        }

        if (Request == null)
        {
            err = "Boş Request";
            return "error";
        }

        Request.Method = "POST";
        Request.KeepAlive = false;
        Request.ContentType = postDataContentType;
        Request.Headers.Add(string.Format("Authorization: key={0}", apiKey));
        Request.ContentLength = byteArray.Length;

        Stream dataStream = null;
        try
        {
            dataStream = Request.GetRequestStream();
            dataStream.Write(byteArray, 0, byteArray.Length);
            dataStream.Close();
        }
        catch (Exception ex)
        {
            err = ex.ToString();
            return "error";
        }


        try
        {
            WebResponse Response = Request.GetResponse();
            HttpStatusCode ResponseCode = ((HttpWebResponse)Response).StatusCode;
            if (ResponseCode.Equals(HttpStatusCode.Unauthorized) || ResponseCode.Equals(HttpStatusCode.Forbidden))
            {
                var text = "Unauthorized - need new token";
            }
            else if (!ResponseCode.Equals(HttpStatusCode.OK))
            {
                var text = "Response from web service isn't OK";
            }

            StreamReader Reader = new StreamReader(Response.GetResponseStream());
            string responseLine = Reader.ReadToEnd();
            Reader.Close();
            return responseLine;
        }
        catch (Exception ex)
        {
            err = ex.ToString();
            return "error";
        }

    }


    public static bool ValidateServerCertificate(
                                                object sender,
                                                X509Certificate certificate,
                                                X509Chain chain,
                                                SslPolicyErrors sslPolicyErrors)
    {
        return true;
    }
}