xmlns:local="clr-namespace:XXXXXXXXXXXX"
    Title="Galleria" Height="600" Width="1024" WindowStyle="SingleBorderWindow" ShowInTaskbar="False" Topmost="True" >

    <Window.Resources>
        <Style TargetType="{x:Type ListBox}">

            <Setter Property="ItemTemplate">
                <Setter.Value>
                    <DataTemplate>
                        <Border 
              BorderBrush="Black" 
              BorderThickness="4" 
              CornerRadius="5"
              Margin="6"
              >
                            <Image 
                Source="{Binding Path=UriSource}" 
                Stretch="Fill"
                Width="220" Height="240" 
               />
                        </Border>
                    </DataTemplate>
                </Setter.Value>
            </Setter>

            <Setter Property="ItemsPanel">
                <Setter.Value>
                    <ItemsPanelTemplate>
                        <WrapPanel />
                    </ItemsPanelTemplate>
                </Setter.Value>
            </Setter>

            <Setter 
        Property="ScrollViewer.HorizontalScrollBarVisibility" 
        Value="Disabled" 
        />
        </Style>
    </Window.Resources>

    <Window.DataContext>
        <ObjectDataProvider 
      ObjectType="{x:Type local:VideoImgLoader}" 
      MethodName="LoadImages" 
      />
    </Window.DataContext>
    <ListBox Name="lbFoto" ItemsSource="{Binding}" />