using System;

using System.Net;

using System.IO;

​

public class Program

{

    public static string SendMessage()

    {

        string serverKey =

            "AAAAcAxADlY:APA91bG-5WWWwbwcekNvZ6JV1AkDOdrBpOfT3D9BsIghLg-0cJW-7edevrvbUvCNbRk1Q_Mkfotm9xaYhWeXS_A7m2EPjdJvJ-ychBDJoSEEtr0j_l8ck0UznyMr5Brqlc60WZgchuut";

​

        try

        {

            var result = "-1";

            var webAddr = "https://fcm.googleapis.com/fcm/send";

​

            var regID =

                "enQha9MmBoE:APA91bG--WqpY6YOkMwc696j4X5eMWJ8im6o_IeQTikyeF496iS1FNR8yGFyoORcxSXmogLnwPx2rccxI0rydncHTahOjlS13iu9I_Gahv2PFLVLgEHq6Qi9GzEQUlQ_oS6eP_9GX9R3";

​

            var httpWebRequest = (HttpWebRequest) WebRequest.Create(webAddr);

            httpWebRequest.ContentType = "application/json";

            httpWebRequest.Headers.Add("Authorization:key=" + serverKey);

            httpWebRequest.Method = "POST";

​

            using (var streamWriter = new StreamWriter(httpWebRequest.GetRequestStream()))

            {

                string json = "{\"to\": \"" + regID +

                              "\",\"notification\": {\"title\": \"New deal\",\"body\": \"20% deal!\"},\"priority\":10}";

                //registration_ids, array of strings -  to, single recipient

                streamWriter.Write(json);

                streamWriter.Flush();

            }

​

            var httpResponse = (HttpWebResponse) httpWebRequest.GetResponse();

            using (var streamReader = new StreamReader(httpResponse.GetResponseStream()))

            {

                result = streamReader.ReadToEnd();

            }

​

            return result;

        }

        catch (Exception ex)

        {

            Console.WriteLine(ex.ToString());

            return "err";

        }

    }

​

    public static void Main()

    {

        SendMessage();

    }

}