Change style of last item in ListBox

Question

I have listbox control which has list of colors. Here is code and Image:

Answer 1

to get this to work w/ a ListBox that changes over time I ended up using a MultiBinding:

Note: the second binding is only used to get notified when the list changes

here is the corresponding MultivalueConverter

public class IsLastItemInContainerConverter : IMultiValueConverter
{
    public object Convert(object[] values, Type targetType, object parameter, System.Globalization.CultureInfo culture)
    {
        DependencyObject item = (DependencyObject)values[0];
        ItemsControl ic = ItemsControl.ItemsControlFromItemContainer(item);

        return ic.ItemContainerGenerator.IndexFromContainer(item) == ic.Items.Count - 1;
    }

    public object[] ConvertBack(object value, Type[] targetTypes, object parameter, System.Globalization.CultureInfo culture)
    {
        throw new NotImplementedException();
    }
}