GCM Decode

strTemp = Intent.ExtrasToString
Log( strTemp )

public string SendNotification(string deviceId, string message)
        {
            string GoogleAppID = "AppIDInhere";
            var SENDER_ID = "SenderIDInhere";
            var value = message;
            string postData;

            WebRequest tRequest;
            tRequest = WebRequest.Create("https://android.googleapis.com/gcm/send");
            tRequest.Method = "post";
            //tRequest.ContentType = " application/x-www-form-urlencoded;charset=UTF-8";

            tRequest.ContentType = " application/json";

            tRequest.Headers.Add(string.Format("Authorization: key={0}", GoogleAppID));

            tRequest.Headers.Add(string.Format("Sender: id={0}", SENDER_ID));

            postData = "{ \"registration_ids\": [ \"" + deviceId + "\" ], " +
                           "\"data\": {\"parameters\":\"" + "15239" + "\", " +
                           "\"timesent\":\"" + System.DateTime.Now.ToString() + "\", " +
                           "\"button1\":\"" + "Confirm" + "\", " +
                           "\"button2\":\"" + "" + "\", " +
                           "\"button3\":\"" + "" + "\", " +
                           "\"message\": \"" + message + "\"}," + 
                           "\"collapse_key\": \"" + "REFRESH_SCHEDULE" + "\", " +
                            "}"; 

            Console.WriteLine("\n");
            Console.WriteLine(postData);

            Byte[] byteArray = Encoding.UTF8.GetBytes(postData);
            tRequest.ContentLength = byteArray.Length;

            Stream dataStream = tRequest.GetRequestStream();
            dataStream.Write(byteArray, 0, byteArray.Length);
            dataStream.Close();

            WebResponse tResponse = tRequest.GetResponse();

            dataStream = tResponse.GetResponseStream();

            StreamReader tReader = new StreamReader(dataStream);

            String sResponseFromServer = tReader.ReadToEnd();

            Console.WriteLine(sResponseFromServer);

            tReader.Close();
            dataStream.Close();
            tResponse.Close();
            return sResponseFromServer;
        }
    }