from transponders listview

     private void TransportUpdated(IAsciiTransport transport)
        {
            if (transport.State == ConnectionState.Available)
            {
                var viewModel = this.Transports.Where(vm => vm.Id == transport.Id).FirstOrDefault();
                if (viewModel == null)
                {
                    viewModel = new TransportModel(this.transportsManager, transport);
                    this.Transports.Add(viewModel);
                }
            }
        }