I m creating api in C# mvc for Sending notification to user mobile.

I m Getting Error Pls give solution ..My code is below..

 

public IHttpActionResult SendMessage()

{

Basic_Response response = new Basic_Response();

try

{

var data = new

{

to = "fxf-kjhSSUy41_XsJxAcvg:APA91bHH-V1nn6hIM6NKRizlA3Edza2B9eXDfUrQJOQEYpsVMPMJKcwZEBefSmlel3cmW6rs54yY9etQ2rRxTWjoJX_ivpzofHZhzk4Q45Yqox5WVG3gbUHx-fBLT_GUM0XLlbS9Abyz", //token id

data = new

{

message = "hello",

name = "ABC",

UserID = "3015",

status = true

}

};

SendNotification(data);

response.StatusCode = 200;

response.Message = "notification send Successfully";

}

catch (Exception ex)

{

response.Message = null;

response.StatusCode = 404;

}

return Ok(response);

}

public void SendNotification(object data) //conver data into byte array

{

var serializer = new JavaScriptSerializer();

var json = serializer.Serialize(data);

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

SendNotification(bytearr);

}

public void SendNotification(Byte[] bytearr)

{

try

{

string server_api_key = ConfigurationManager.AppSettings["SERVER_API_KEY"];

string sender_id = ConfigurationManager.AppSettings["SERVER_ID"];

// WebRequest tRequest = WebRequest.Create("https://zukuz-a363a.firebaseio.com");

WebRequest tRequest = WebRequest.Create("......");

tRequest.UseDefaultCredentials = true;

tRequest.Method = "post";

tRequest.ContentType = "application/json";

tRequest.Headers.Add($"Authorization: key={server_api_key}");

tRequest.Headers.Add($"Sender: id={sender_id}");

tRequest.ContentLength = bytearr.Length;

Stream datastream = tRequest.GetRequestStream();

datastream.Write(bytearr, 0, bytearr.Length);

// datastream.Close();

tRequest.Proxy.Credentials = System.Net.CredentialCache.DefaultCredentials;

//tRequest.UseDefaultCredentials = true;

WebResponse tresponse = tRequest.GetResponse();   //Error : The remote server returned an error: (403) Forbidden

datastream = tresponse.GetResponseStream();

StreamReader tReader = new StreamReader(datastream);

string sResponseFromServer = tReader.ReadToEnd();

tReader.Close();

datastream.Close();

tresponse.Close();

}

catch (Exception ex)

{

throw ex;

}

}