Push notification for android using C#.Net

            // App ID

            string googleAppID = "AIzaSyAYfVEk_C0ATkqbZo6mp2JI1c8bv58wV54";

            // sender key which is generated from Google

            var senderID = "649193597288";

            // Device ID which is used to pull message from android server

            string deviceID = "APA91bFJGvf3zyfVxuTu6WgZKnrSMch6OXUGMqZtean2q9lQ7k-5cibteOgh3wnxME7ex…… ";

            var message = "This is test push notification for android";

           

            WebRequest request;

            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}", googleAppID));

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

            string postData = @"collapse_key=score_update&time_to_live=108&delay_while_idle=1&data.message=" + message + "&data.time=" +

            System.DateTime.Now.ToString() + "&registration_id=" + deviceID + "";

            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 sResponseFromServer = reader.ReadToEnd();

            reader.Close();

            dataStream.Close();

            response.Close();