<Window x:Class="Pippo.Galleria"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="Galleria" Height="600" Width="1024" WindowStyle="ToolWindow" ShowInTaskbar="True" Topmost="True" >

    <ListBox Name="lbFoto">

        <ListBox.ItemTemplate>
            <DataTemplate>
                <Image  Stretch="Fill" Width="100" Height="100"  />
            </DataTemplate>
        </ListBox.ItemTemplate>
    </ListBox>
</Window>