public MainWindow()
{
InitializeComponent();
//Get list of connections
conns = new TCPUDPConnections();
conns.Refresh();
//Set up task that refreshes connection periodically
worker = new BackgroundWorker();
worker.DoWork += WorkerRefreshConnections;
_timer = new Timer(500);
_timer.Elapsed += TimerElapsed;
_timer.Start();
ConnectionsDataGrid.ItemsSource = new ObservableCollection <TCPUDPConnection>(conns);
}