prs/prs.desktop/Panels/DataEntry/DocumentPage.xaml

<UserControl x:Name="Control"
             x:Class="PRSDesktop.Panels.DataEntry.DocumentPage"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
             xmlns:local="clr-namespace:PRSDesktop.Panels.DataEntry"
             mc:Ignorable="d" 
             d:DesignHeight="450" d:DesignWidth="800">
    <Border x:Name="Selection"
            Padding="15"
            BorderBrush="{Binding ElementName=Control,Path=SelectionBorder}" BorderThickness="1"
            Background="{Binding ElementName=Control,Path=SelectionBackground}"
            MouseDown="Border_MouseDown">
        <Border BorderBrush="Black" BorderThickness="1">
            <Image x:Name="Image" Source="{Binding ElementName=Control,Path=Page.Thumbnail}"/>
        </Border>
    </Border>
</UserControl>