ArcGISWindowsPhoneSDK.OrderByFieldQuery.FeatureListBox_SelectionChanged C# (CSharp) Method

        private void FeatureListBox_SelectionChanged(object sender, System.Windows.Controls.SelectionChangedEventArgs e)
        {
            (MyMap.Layers["MontgomeryParcels"] as GraphicsLayer).ClearSelection();

            int index = FeatureListBox.SelectedIndex;
            if (index > -1)
            {
                (FeatureListBox.SelectedItem as Graphic).Selected = true;
            }
        }