Unhandled Exception WPF

  /// <summary>
    /// Interaction logic for App.xaml
    /// </summary>
    public partial class App:Application {

        void Application_Startup(object sender,StartupEventArgs e) {
            AppDomain.CurrentDomain.UnhandledException += new UnhandledExceptionEventHandler(CurrentDomain_UnhandledException);
        }

        private void Application_DispatcherUnhandledException(object sender,System.Windows.Threading.DispatcherUnhandledExceptionEventArgs e) {

            try {
                MessageBox.Show(e.Exception.Message,
                    "Un expected error",
                    MessageBoxButton.OK,
                    MessageBoxImage.Error);

            }
            finally {
                e.Handled = true;
            }
        }


        void CurrentDomain_UnhandledException(object sender,UnhandledExceptionEventArgs e) {

            if(e.IsTerminating)
                return;

            string msg = "Unknown error";

            Exception ex = e.ExceptionObject as Exception;

            if(ex != null)
                msg = ex.Message;

            MessageBox.Show(msg,"Un expected error",
                MessageBoxButton.OK,MessageBoxImage.Error);
        }
    }