How to send a notification message from the server to all clients in WCF (broadcast you can say)?

Question

I want to send a net tcp WCF service notification to every client every second, can you tell me the broadcast?

After helpful answers

I wrote the following method, which will send notifications (heartbeat) to all connected users

foreach (IHeartBeatCallback callback in subscribers)
{
  ThreadPool.QueueUserWorkItem(delegate(object state)
  {
    ICommunicationObject communicationCallback = (ICommunicationObject)callback;
    if (communicationCallback.State == CommunicationState.Opened)
    {
      try
      {
         callback.OnSendHeartBeat(_heartbeatInfo.message,    _heartbeatInfo.marketstart,_heartbeatInfo.marketend, _heartbeatInfo.isrunning,   DateTime.Now);
      }
      catch (CommunicationObjectAbortedException)
      {
        Logger.Log(LogType.Info, "BroadCast", "User aborted");
        communicationCallback.Abort();
      }
      catch (TimeoutException)
      {
       Logger.Log(LogType.Info, "BroadCast", "User timeout");
       communicationCallback.Abort();
      }
      catch (Exception ex)
      {
        Logger.Log(LogType.Error, "BroadCast", "Exception " + ex.Message + "\n" +  ex.StackTrace);
        communicationCallback.Abort();
      }

    }
    else
    {
      DeletionList.Add(callback);
    }
  }
  );
}

I'm worried about calling the callback method since the client can close his application, but I processed it with a try catch, reduced the timeout and sent a wide listing in parallel, so is that enough?

Answer 1

;

Answer 2

( - LogIn LogOut , , CallbackContext). System.Time.Timers .

. Keep-Alive Hear-Beat ( ), , .