S>public class ListItemTemplateSelector : DataTemplateSelector
S>    {
S>        public DataTemplate DefaultnDataTemplate { get; set; }
S>        public DataTemplate NoteDataTemplate { get; set; }
S>        public DataTemplate SelectedNoteDataTemplate { get; set; }
 
S>        public override DataTemplate SelectTemplate(object item, DependencyObject container)
S>        {
S>            if (null == item)
S>                return DefaultnDataTemplate;
S>            var lb = container as ListBox;
S>            if (item == lb.SelectedItem)
S>                return SelectedNoteDataTemplate;
S>            else
S>                return NoteDataTemplate;
S>        }
S>    }
S>