Google GCM Send push notification to android from server -ASP.Net

Google GCM Send notification to android Device from server for single Registration Id (using ASP.net)

https://console.developers.google.com/

From this website we will get  

1. SENDER_ID = "195123476026 "

2. API key ="AIzaSyBQgCaVwOTbsQbA5hgFbee7_mx5qvLYdI4"

• when click on 
• APIs ---> Google Cloud Messaging for Android click status ON 
• and then click on Credentials then Select Create New Key --->Server Key-->Create 
•  Application Id or API key= "AIzaSyBQgCaVwOTbsQbA5hgFbee7_mx5qvLYdI4"

 3. and will get Registration Id from Android device :

          When Android device sends sender id & application id to GCM Server,

          Google Gcm server issues Registration Id to Android Device

Create default.aspx page

Notification Message label_Result

Source Code (C#) using System.Net; using System.Text; using System.IO; public partial class _Default : System.Web.UI.Page {    string ApplicationID;    string SENDER_ID;    string RegId;     protected void Page_Load(object sender, EventArgs e)     {     }     protected void Button1_Click(object sender, EventArgs e)     {         RegId= "APA91bEoLPR9_xxxxxxxxxx_NwulrjoxNUQ";         ApplicationID= "AIzaSyBQgCaVwOTbsQbA5hgFbee7_mx5qvLYdI4";         SENDER_ID= "195123476026";         var value = TextBox1.Text; //message text box         WebRequest tRequest;         tRequest=WebRequest.Create("https://android.googleapis.com/gcm/send");                        tRequest.Method = "post";                            tRequest.ContentType ="application/x-www-form-urlencoded;charset=UTF-8";         tRequest.Headers.Add(string.Format("Authorization: key={0}", ApplicationID));                tRequest.Headers.Add(string.Format("Sender: id={0}", SENDER_ID));                                                                                           //Data post to the Server             string postData =             "collapse_key=score_update&time_to_live=108&delay_while_idle=1&data.message="                  + value + "&data.time=" + System.DateTime.Now.ToString() +          "&registration_id=" +RegId + "";                                             Console.WriteLine(postData);                                                                Byte[] byteArray =Encoding.UTF8.GetBytes(postData);                                          tRequest.ContentLength = byteArray.Length;                                                   Stream dataStream =tRequest.GetRequestStream();                                       dataStream.Write(byteArray, 0, byteArray.Length);                                            dataStream.Close();           WebResponse tResponse =tRequest.GetResponse();                                              dataStream =tResponse.GetResponseStream();                                                  StreamReader tReader = new StreamReader(dataStream);                                        String sResponseFromServer = tReader.ReadToEnd();  //Get response from GCM server            label_Result.Text = sResponseFromServer; //Assigning GCM response to Label text          tReader.Close();                                                                             dataStream.Close();                                                     tResponse.Close();                                                                                                          }    }           Run the application Notification Message You will get  Google GCM Server               Response  id=343kdhgsy4y32i42@adfgd