title: Firebase Cloud Messaging and C# server side code
body: <p>I am using FCM in my Android and iOS app.  The client side code is working correctly because from the Firebase console I can send notifications to both platforms with out any problem.  With my C# code I can send notifications successfully to android devices but the notifications never appear on iPhone unless directly coming from the Firebase notification console.  I don't know what gives.</p>
  
  <p>C# server-side code</p>
  
  <pre><code>try
  {
      var applicationID = "application_id";
      var senderId = "sender_id";
      string deviceId = "device_id_of_reciever";
      WebRequest tRequest = WebRequest.Create("https://fcm.googleapis.com/fcm/send");
      tRequest.Method = "post";
      tRequest.ContentType = "application/json";
      var data = new
      {
          to = deviceId,
          notification = 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.Headers.Add(string.Format("Authorization: key={0}", applicationID));
      tRequest.Headers.Add(string.Format("Sender: id={0}", senderId));
      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();
                  Response.Write(sResponseFromServer);
              }
          }
      }
  }
  catch (Exception ex)
  {
      Response.Write(ex.Message);
  }
  </code></pre>
  
  <p>Notifications are not working on iPhone with my server side code but I get a good response from Firebase.</p>
  
  <pre><code>    {
      "multicast_id": 479608 XXXXXX529964,
      "success": 1,
      "failure": 0,
      "canonical_ids": 0,
      "results": [{
          "message_id": "0:1467935842135743%a13567c6a13567c6"
      }]
  }
  </code></pre>
  
  <p>Any help or suggestions would be really appreciated. </p>