private void Level1Click(object sender, RoutedEventArgs e)
        {
            TryInitialize();

            foreach (var security in SecurityPicker.SelectedSecurities)
            {
                var window = _level1Windows.SafeAdd(security, s =>
                {
                    // create level1 window
                    var wnd = new Level1Window
                    {
                        Title = security.Code + " level1"
                    };

                    // subscribe on level1
                    MainWindow.Instance.Trader.RegisterSecurity(security);

                    wnd.MakeHideable();
                    return(wnd);
                });

                if (window.Visibility == Visibility.Visible)
                {
                    window.Hide();
                }
                else
                {
                    window.Show();
                }
            }
        }
        private void Level1Click(object sender, RoutedEventArgs e)
        {
            TryInitialize();

            var window = _level1Windows.SafeAdd(SelectedSecurity, security =>
            {
                // создаем окно со сделками
                var wnd = new Level1Window {
                    Title = security.Code + " level1"
                };

                // начинаем получать сделки
                MainWindow.Instance.Trader.RegisterSecurity(security);

                wnd.MakeHideable();
                return(wnd);
            });

            if (window.Visibility == Visibility.Visible)
            {
                window.Hide();
            }
            else
            {
                window.Show();
            }
        }
		private void Level1Click(object sender, RoutedEventArgs e)
		{
			TryInitialize();

			var window = _level1Windows.SafeAdd(SelectedSecurity, security =>
			{
				// create level1 window
				var wnd = new Level1Window { Title = security.Code + " level1" };

				// subscribe on level1
				MainWindow.Instance.Trader.RegisterSecurity(security);

				wnd.MakeHideable();
				return wnd;
			});

			if (window.Visibility == Visibility.Visible)
				window.Hide();
			else
				window.Show();
		}