private void SymbolIDLB_OnSelectionChanged(object sender, System.Windows.Controls.SelectionChangedEventArgs e)
{
UniqueValueInfo uvi = e.AddedItems[0] as UniqueValueInfo;
if (uvi == null) return;
Graphic g = FeatureInfoPage.DataContext as Graphic;
if (g != null)
g.Attributes["symbolid"] = (Int16)uvi.Value;
}