Confirm/Information Dialog with Caliburn Micro

InformationDialogView.xaml:

<Window 
   x:Class="WPFSample1.InformationDialogView"
   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"
   mc:Ignorable="d" 
   Width="300"
   Height="300"
   d:DesignHeight="300" 
   d:DesignWidth="300"
   Focusable="True"
   Loaded="ConfirmView_OnLoaded"
   PreviewKeyDown="ConfirmView_PreviewKeyDown" 
   WindowStyle="ToolWindow" 
   WindowStartupLocation="CenterOwner">
   <Grid VerticalAlignment="Stretch"
         HorizontalAlignment="Stretch"
         Background="{Binding Path=Background, ElementName=Text}"
         >
       <Grid.RowDefinitions>
           <RowDefinition Height="*" />
           <RowDefinition Height="auto" />
       </Grid.RowDefinitions>
       <ScrollViewer 
           VerticalScrollBarVisibility="Auto" 
           HorizontalScrollBarVisibility="Auto" 
           VerticalAlignment="Stretch"
           HorizontalAlignment="Stretch"
           >
           <TextBox
               BorderThickness="0"
               IsReadOnly="True"
               VerticalContentAlignment="Center"
               TextAlignment="Center"
               HorizontalAlignment="Stretch"
               VerticalAlignment="Stretch"
               x:Name="Text" />
       </ScrollViewer>
       <Button Height="20" 
               Content="OK"
               HorizontalAlignment="Center"
               VerticalAlignment="Bottom"
               Grid.Row="1"
               x:Name="Close"
               />
   </Grid>
</Window>