Проблема экспорта

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using StockSharp.Quik;
using StockSharp.BusinessEntities;
using Ecng.Xaml;


namespace test
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }
        private QuikTrader _trader;
        private void connect_Click(object sender, RoutedEventArgs e)
        {
            _trader = new QuikTrader(QuikTerminal.GetDefaultPath());

            _trader.NewSecurities += securities => this.GuiAsync(() => 
                                    {
                                        Securities.ItemsSource = _trader.Securities;
                                    });

            _trader.NewPortfolios += portfolios => this.GuiAsync(() =>
                {
                    Portfolios.ItemsSource = _trader.Portfolios;
                });
            _trader.Connected += () => _trader.StartExport();
            _trader.Connect();
        }
    }
}