public ItemViewer()
{
    InitializeComponent();
    Loaded += ItemViewer_Loaded;
}
 
void ItemViewer_Loaded(object sender, RoutedEventArgs e)
{
    if (LayoutRoot.Visibility != Visibility.Collapsed)
        throw new Exception("item.Visibility != Collapsed");

<Page
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="Jerry Nixon">
  <Page.Resources>
 
   <Style TargetType="Border" x:Key="BorderStyle">
    <Setter Property="Margin" Value="10" />
    <Setter Property="Padding" Value="10" />
    <Setter Property="Height" Value="50" />

<Page
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="Jerry Nixon">
  <Page.Resources>
 
   <Style TargetType="Border" x:Key="BorderStyle">
   
      <!-- Outer Border Style -->
      <Setter Property="Opacity" Value=".5" />