public void SendData(string message)
        {
            byte[] buffer = Encoding.UTF8.GetBytes(message);
            TcpClient tcpClient = new TcpClient(_server, _port);
            NetworkStream networkStream = null;

            try
            {

                Console.WriteLine("Connected to server... sending echo string");

                networkStream = tcpClient.GetStream();
                networkStream.Write(buffer, 0, buffer.Length);

                Console.WriteLine("Sent {0} bytes to server...", buffer.Length);

                int totalBytesRcvd = 0;

                while (totalBytesRcvd < buffer.Length)
                {
                    var bytesRcvd = 0;
                    if ((bytesRcvd = networkStream.Read(buffer, totalBytesRcvd,buffer.Length - totalBytesRcvd)) == 0)
                    {
                         Console.WriteLine("Connection closed prematurely.");
                         break;
                    }
                    totalBytesRcvd += bytesRcvd;
                }
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.StackTrace);
            }
            finally
            {
                networkStream?.Close();
                tcpClient.Close();
            }
        }