private pjsip_redirect_op OnCallRedirect(int callId, ref pjsip_uri target, IntPtr e)
 {
     var @event = new CallRedirected() {Id = callId};
     _eventAggregator.Publish(@event);
     return (pjsip_redirect_op) @event.Option;
 }
 public void OnCallRedirected(CallRedirected args)
 {
     var ea = new CallRedirectedEventArgs()
                  {
                      CallId = args.Id,
                      Target = args.Target,
                      Option = args.Option
                  };
     CallRedirected(this, ea);
     args.Option = ea.Option;
 }