Thumbnail image

Hi
I have a Listbox with an Image element. I want to add a thumbnail here.

<ListBox x:Name="StoriesList" SelectionChanged="StoriesList_SelectionChanged" Style="{StaticResource StoriesList}">
            <ListBox.ItemTemplate>
                <DataTemplate>
                    <Stack
                        <!-- Story Thumbnail Preview -->
                        <Image Source="{Binding ThumbNail}" />
   &nb ...