Page.xaml

<UserControl x:Class="DataTemplates.Page"
  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
  Width="400" Height="300">
  <Grid x:Name="LayoutRoot" >
    <Grid.RowDefinitions>
      <RowDefinition />
      <RowDefinition />
    </Grid.RowDefinitions>
    
    <!--<Snippet3>-->
    <Grid.Resources>
      <DataTemplate x:Key="CBTemplate">
        <Grid>
          <Grid.ColumnDefinitions>
            <ColumnDefinition />
            <ColumnDefinition />
          </Grid.ColumnDefinitions>
          <Image Grid.Column="0" Width="50" Height="50" 
            Source="{Binding Photo}" Stretch="Fill"/>
          <TextBlock Grid.Column="1" Text="{Binding Title}" 
            Margin="10" HorizontalAlignment="Left" FontSize="20"/>
        </Grid>
      </DataTemplate>
    </Grid.Resources>
    <!--</Snippet3>-->
    
    <!--<Snippet4>-->
    <ComboBox x:Name="CB1" VerticalAlignment="Top" HorizontalAlignment="Left" 
      ItemTemplate="{StaticResource CBTemplate}" ItemsSource="{Binding}" />
    <!--</Snippet4>-->


  </Grid>
</UserControl>