private void Application_Startup(object sender, StartupEventArgs e) { ILog log = LogManager.GetLogger(typeof(App)); try { CultureInfo ci = new CultureInfo(Thread.CurrentThread.CurrentCulture.Name); ci.DateTimeFormat.ShortDatePattern = "yyyy-MM-dd"; Thread.CurrentThread.CurrentCulture = ci; MainWindow mainWindow = new MainWindow(); mainWindow.Show(); } catch (Exception ex) { MessageBox.Show("Network not connected!"); log.ErrorFormat("Application Start up Error {0}", ex); } }