Android GCM Push Notification

public string SendNotification1()

       {
           string deviceId;
           string serverApiKey;
           string result;

           try
           {
               DataAccess.Rregullimi_i_property_ve_ne_StartUP();

               lidhaj_dbDataContext db = new lidhaj_dbDataContext(DataAccess.ConString);

               var tokeni = from p in db.Users
                            select p.Token;

               deviceId = tokeni.First();


               serverApiKey = "XXXXXXXXXXXXXXXXXXXXXXXX-XXXX";

                         WebRequest tRequest = WebRequest.Create("https://fcm.googleapis.com/fcm/send");
               tRequest.Method = "post";

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

               tRequest.ContentType = "application/json";


               var data = new
               {
                   to = deviceId,
                   message = new
                   {
                       body = "This is the message",
                       title = "This is the title",
                       //icon = "myicon"
                   }
               };

               var serializer = new JavaScriptSerializer();
               var json = serializer.Serialize(data);

               Byte[] byteArray = Encoding.UTF8.GetBytes(json);




               tRequest.ContentLength = byteArray.Length;

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

                   using (WebResponse tResponse = tRequest.GetResponse())
                   {
                       using (Stream dataStreamResponse = tResponse.GetResponseStream())
                       {
                           using (StreamReader tReader = new StreamReader(dataStreamResponse))
                           {
                               String sResponseFromServer = tReader.ReadToEnd();

                               // String sResponseFromServer = tReader.ReadToEnd();
                               result = sResponseFromServer;


                           }
                       }
                   }
               }



           }
           catch (Exception ex)
           {
               result = ex.Message;

           }

           return result;


    }

<?php 

	function send_notification ($tokens, $message1)
	{
		

		$url = 'https://fcm.googleapis.com/fcm/send';
		$fields = array(
			 'registration_ids' => $tokens,
			 'data' => $message1
			);
	
			$headers = array(			
			'Authorization:key =XXXXXXXXXXXXXXXXx-XXXX,
			'Content-Type: application/json'
			);
			
			
	   $ch = curl_init();
       curl_setopt($ch, CURLOPT_URL, $url);
       curl_setopt($ch, CURLOPT_POST, true);
       curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
       curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
       curl_setopt ($ch, CURLOPT_SSL_VERIFYHOST, 0);  
       curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
       curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($fields));
       $result = curl_exec($ch);           
       if ($result === FALSE) {
           die('Curl failed: ' . curl_error($ch));
       }
       curl_close($ch);
       return $result;
	}
	

	$conn = mysqli_connect("localhost","root","","fcm2");

	$sql = " Select Token From users";

	$result = mysqli_query($conn,$sql);
	$tokens = array();

	if(mysqli_num_rows($result) > 0 ){

		while ($row = mysqli_fetch_assoc($result)) {
			$tokens[] = $row["Token"];
		}
	}

	mysqli_close($conn);

	$message1 = array("message1" => "My message");
	$message_status = send_notification($tokens, $message1);
	echo $message_status ;



 ?>

string postData = "collapse_key=score_update&time_to_live=108&
        delay_while_idle=1&data.message=" + value + "&data.time=" + 
        System.DateTime.Now.ToString() + "®istration_id=" + deviceId + "";

working fine for me