Android c2dm unicode charcters are not received
===

This is my server side code or android side code.
This code is working fine only for English messages. If I use Unicode charters like use Arabic language then it shows nothing in place of Arabic.
In cause of English Arabic mix, it skip the only Arabic charters.

Kindly give me solution.
Thanks!

This is my C# code

    private string SendNotification(string authstring, string id, string msg)
        {
            try
            {
                ServicePointManager.ServerCertificateValidationCallback = (object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors sslPolicyErrors) => true;
                WebRequest request = WebRequest.Create("https://android.googleapis.com/gcm/send");
                request.Method = "POST";
                request.ContentType = "application/x-www-form-urlencoded;charset=UTF-8";

                request.Headers.Add(string.Format("Authorization: key={0}", authstring));
                string collaspeKey = Guid.NewGuid().ToString("n");
                string postData = string.Format("registration_id={0}&data.payload={1}&collapse_key={2}", id, msg, collaspeKey);
                byte[] byteArray = Encoding.UTF8.GetBytes(postData);
                request.ContentLength = byteArray.Length;
                Stream dataStream = request.GetRequestStream();
                dataStream.Write(byteArray, 0, byteArray.Length);
                dataStream.Close();
                WebResponse response = request.GetResponse();
                dataStream = response.GetResponseStream();
                StreamReader reader = new StreamReader(dataStream);
                string responseFromServer = reader.ReadToEnd();
                reader.Close();
                dataStream.Close();
                response.Close();

                return responseFromServer;
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }


And this is my Android side code that catch the message.

    @Override
    protected void onMessage(Context context, Intent intent) {        
        String message = ArabicUtilities.reshape(intent.getExtras().getString("payload"));
    }
