update demo

src/Shared/HandyControlDemo_Shared/Resources/Themes/Styles/Style.xaml

@@ -40,6 +40,7 @@
     </Style>
 
     <Style x:Key="ListBoxItemTransparent" BasedOn="{StaticResource ListBoxItemBaseStyle}" TargetType="ListBoxItem">
+        <Setter Property="Visibility" Value="{Binding IsVisible,Converter={StaticResource Boolean2VisibilityConverter}}"/>
         <Setter Property="hc:BorderElement.CornerRadius" Value="4"/>
         <Setter Property="Background" Value="Transparent"/>
     </Style>