ArcGISWindowsPhoneSDK.MainPage.BackButton_Click C# (CSharp) Метод

        private void BackButton_Click(object sender, EventArgs e)
        {
            if (_listIndex > 0)
                _listIndex--;
            else
                _listIndex = _listBoxes.Count - 1;
            SwitchLists();
            //CategoryListBox.SelectedIndex = _listIndex;
        }