how to push updates from server to client automatically by udp client

protected void Page_Load(object sender, EventArgs e)
{
      // IPAddress serverIP = IPAddress.Parse("192.168.0.5");     // Server IP
    IPAddress serverIP = IPAddress.Broadcast;     // Server IP
    port = 10005                                         // Server port
    IPEndPoint ipEndPoint = new IPEndPoint(serverIP, port);

    string response = SendMessageToServer("hello server, this is Sai Teja", ipEndPoint);      // Send the message to the server

    Response.Write(response);
}        
private string SendMessageToServer(string message, IPEndPoint serverAddress)
{
    string serverResponse = string.Empty;       // The variable which we will use to store the server response

    using (UdpClient client = new UdpClient())
    {
        byte[] data = Encoding.UTF8.GetBytes(message);      // Convert our message to a byte array
        client.Send(data, data.Length, serverAddress);      // Send the date to the server

        serverResponse = Encoding.UTF8.GetString(client.Receive(ref serverAddress));    // Retrieve the response from server as byte array and convert it to string
    }
    return serverResponse;
}

int port = 10009;
UdpClient udpListener = new UdpClient(port);
IPEndPoint ipEndPoint = new IPEndPoint(IPAddress.Broadcast, port);

byte[] receivedBytes = udpListener.Receive(ref ipEndPoint);      // Receive the information from the client as byte array
string clientMessage = Encoding.UTF8.GetString(receivedBytes);   // Convert the message to a string

byte[] response = Encoding.UTF8.GetBytes("Hello client, this is the server");   // Convert the reponse we want to send to the client to byte array
udpListener.Send(response, response.Length, ipEndPoint);