Utilisez VisualBrush
<Page xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
<UniformGrid Rows="1">
<StackPanel Name="Original" Width="100" Height="100">
<TextBlock Text="Pretend I'm a list of images"/>
<TextBlock Text="Pretend I'm a list of images"/>
<TextBlock Text="Pretend I'm a list of images"/>
<TextBlock Text="Pretend I'm a list of images"/>
<TextBlock Text="Pretend I'm a list of images"/>
<TextBlock Text="Pretend I'm a list of images"/>
<TextBlock Text="Pretend I'm a list of images"/>
<TextBlock Text="Pretend I'm a list of images"/>
<TextBlock Text="Pretend I'm a list of images"/>
<TextBlock Text="Pretend I'm a list of images"/>
</StackPanel>
<Rectangle Name="Thumbnail" Width="50" Height="50">
<Rectangle.Fill>
<VisualBrush Visual="{Binding ElementName=Original}"/>
</Rectangle.Fill>
</Rectangle>
</UniformGrid>
</Page>
comment est formé babby? – Will