Displaying Border on TextBlock when TextBlock placed inside ScrollViewer

Question

I have WPF application, In one of My WPF form has TextBlock. I placed TextBlock inside ScrollViewer for providing scrolling functionality. I want Border on TextBlock so, I have written following code in XAML .

<ScrollViewer Margin="230,32,12,147">
    <Border BorderThickness="1" BorderBrush="Black">
          <TextBlock Name="textBlock1"></TextBlock>
      </Border>
 </ScrollViewer>

With scrollBar GUI displayed like below.

Bottom Border display on scroll down to the TextBlock. User Experience is not good for this design. So, I tried with below code but Border is not displaying.

<Border BorderThickness="1" BorderBrush="Black">
    <ScrollViewer Margin="230,32,12,147">
          <TextBlock Name="textBlock1"></TextBlock>
     </ScrollViewer>
 </Border>

How I can display Border When TextBlock placed inside ScrollViewer?

Answer 1

Set border in ScrollViewer control!

<ScrollViewer Margin="230,32,12,147" BorderThickness="5">
      <TextBlock Name="textBlock1"></TextBlock>
 </ScrollViewer>

In properties window, expand Other group and set BorderThickness

Next code works well:

<ScrollViewer Height="116"  Margin="115,112,0,0" Width="269">
        <Border BorderBrush="Silver" BorderThickness="5" Height="100" Width="200">
            <TextBlock Height="69" Name="textBlock1" Text="TextBlock" />
        </Border>
    </ScrollViewer>

Code example for outside border:

<Border BorderBrush="Silver" BorderThickness="5" Height="100" HorizontalAlignment="Left" Margin="167,104,0,0" Name="border1" VerticalAlignment="Top" Width="200">
        <ScrollViewer Height="83" Name="sv" Width="184">
            <TextBlock Name="textBlock1" Text="TextBlock TextBlockTextBlockTextBlock TextBlock TextBlock TextBlock TextBlock TextBlockTextBlockTextBlock TextBlock TextBlock TextBloc TextBlock TextBlockTextBlockTextBlock TextBlock TextBlock TextBloc TextBlock TextBlockTextBlockTextBlock TextBlock TextBlock TextBloc" TextWrapping="Wrap" />
        </ScrollViewer>
    </Border>