message: Fixed bindingexpression error with listbox itemssource (win)
diff: VerticalAlignment="Top" Width="400"
  VirtualizingStackPanel.VirtualizationMode="Recycling"
  ItemTemplateSelector="{StaticResource autocompleteTemplateSelector}"
  - ItemsSource="{Binding Items}" PreviewMouseDown="listBox_PreviewMouseDown"
  + PreviewMouseDown="listBox_PreviewMouseDown"
  >
  <ListBox.ItemContainerStyle>
  <Style TargetType="ListBoxItem">
  