Scrolling ValidationSummary in Silverlight - silverlight

Question

I am attempting to make ValidationSummary in Silverlight scrollable. It does not work and I am not sure what I am doing wrong.
When wrapped in ScrollViewer, the validationsummary is not shown.
<UserControl x:Class="SilverlightDataValidation.MainPage"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:ct="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Data.Input"
mc:Ignorable="d"
d:DesignHeight="300" d:DesignWidth="400">
<Grid x:Name="LayoutRoot" Background="White" BindingValidationError="LayoutRoot_BindingValidationError">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="55" />
<ColumnDefinition Width="345" />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="25" />
<RowDefinition Height="25" />
<RowDefinition Height="25" />
<RowDefinition Height="25" />
<RowDefinition Height="160" />
<RowDefinition Height="40*" />
</Grid.RowDefinitions>
<ScrollViewer Grid.Row="4" Height="135" HorizontalAlignment="Left" Margin="0,4,0,0" Name="scrollViewer1" VerticalAlignment="Top" MaxHeight="200" Width="333" Grid.Column="1" HorizontalScrollBarVisibility="Auto">
<ct:ValidationSummary Width="300" Grid.Column="1" Margin="0,0,45,0" />
</ScrollViewer>
<TextBox Name="txtName" Text="{Binding Name, Mode=TwoWay, ValidatesOnExceptions =True, NotifyOnValidationError=True, UpdateSourceTrigger=Explicit}"
Grid.Column="1" Grid.Row="1"
Height="23" HorizontalAlignment="Left" VerticalAlignment="Top" Width="185" />
<TextBox Name="txtAge"
Text="{Binding Age, Mode=TwoWay, ValidatesOnExceptions=True, NotifyOnValidationError=True, UpdateSourceTrigger=Explicit}"
Grid.Column="1" Grid.Row="2"
Height="23" HorizontalAlignment="Left" VerticalAlignment="Top" Width="120" />
<Button Content="Save" Grid.Column="1" Grid.Row="3"
Height="23" HorizontalAlignment="Left" Name="butSave" VerticalAlignment="Top" Width="75" Click="butSave_Click" />
<TextBlock Grid.Row="1" Name="textBlock1" Text="Name"
VerticalAlignment="Top" Margin="22,0,0,0" Height="23" HorizontalAlignment="Left" />
<TextBlock Grid.Row="2" Name="textBlock2" Text="Age"
VerticalAlignment="Top" Margin="34,0,0,0" Height="23" HorizontalAlignment="Left" />
</Grid>
When you remove the validationsummary from ScrollViewer it shows.

Answer 1

ScrollView not required, was able to accomplish the same effect by setting maxheight property on the ValidationSummary