title: How to set FontSize of a Textblock, which is in a Viewbox
body: <p>I can't set the <code>FontSize</code> of the <code>Text</code> in a <code>TextBlock</code>, since the <code>TextBox</code> is in a <code>Viewbox</code>. Why?</p>
  
  <pre><code>&lt;Grid Margin="35,30,35,0" ShowGridLines="False" &gt;
      &lt;Grid.ColumnDefinitions&gt;
          &lt;ColumnDefinition MinWidth="270 px" Width="2*"/&gt;
          &lt;ColumnDefinition Width="5*"/&gt;
      &lt;/Grid.ColumnDefinitions&gt;
      &lt;Grid.RowDefinitions&gt;
          &lt;RowDefinition  /&gt;
          &lt;RowDefinition /&gt;
          &lt;RowDefinition /&gt;
          &lt;RowDefinition /&gt;
      &lt;/Grid.RowDefinitions&gt;
      &lt;Border Grid.Row="0" Grid.Column="0" BorderBrush="Black" BorderThickness="1,1,1,0" /&gt;
      &lt;Viewbox&gt;
          &lt;TextBlock  Margin="10,5,0,5" Grid.Row="0" Grid.Column="0"&gt;Team:&lt;/TextBlock&gt;
      &lt;/Viewbox&gt;
      &lt;Border Grid.Row="1" Grid.Column="0" BorderBrush="Black" BorderThickness="1,1,1,0" /&gt;
      &lt;TextBlock Margin="10,5,0,5" Grid.Row="1" Grid.Column="0"&gt;Beschreibung:&lt;/TextBlock&gt;
      &lt;Border Grid.Row="2" Grid.Column="0" BorderBrush="Black" BorderThickness="1,1,1,0" /&gt;
      &lt;TextBlock Margin="10,5,0,5" Grid.Row="2" Grid.Column="0"&gt;Milestone:&lt;/TextBlock&gt;
      &lt;Border Grid.Row="3" Grid.Column="0" BorderBrush="Black" BorderThickness="1,1,1,1" /&gt;
      &lt;TextBlock Margin="10,5,0,5" Grid.Row="3" Grid.Column="0"&gt;Status:&lt;/TextBlock&gt;
      &lt;Border Grid.Row="0" Grid.Column="1" BorderBrush="Black" BorderThickness="0,1,1,0" /&gt;
      &lt;TextBlock x:Name="tb_Team_dyn" Margin="10,5,0,5"  Grid.Row="0" Grid.Column="1"
                 FontWeight="Bold" Text="{Binding Data.Team}" TextWrapping="Wrap"&gt;&lt;/TextBlock&gt;
      &lt;Border Grid.Row="1" Grid.Column="1" BorderBrush="Black" BorderThickness="0,1,1,0" /&gt;
      &lt;TextBlock x:Name="tb_Descr_dyn" Margin="10,5,0,5" Grid.Row="1" Grid.Column="1"
                 FontWeight="Bold" Text="{Binding Data.Description}" TextWrapping="Wrap"/&gt;
      &lt;Border Grid.Row="2" Grid.Column="1" BorderBrush="Black" BorderThickness="0,1,1,0" /&gt;
      &lt;TextBlock x:Name="tb_Milestone_dyn" Margin="10,5,0,5" Grid.Row="2" Grid.Column="1"
                 FontWeight="Bold" Text="{Binding Data.Milestone}" TextWrapping="Wrap"/&gt;
      &lt;Border Grid.Row="3" Grid.Column="1" BorderBrush="Black" BorderThickness="0,1,1,1" /&gt;
      &lt;StackPanel Margin="10,5,0,5" Grid.Row="3" Grid.Column="1" Orientation="Horizontal"&gt;
          &lt;Image  x:Name="imgSmile" MaxWidth="38" Source="{Binding Data.Smiley}" /&gt;
          &lt;TextBlock x:Name="tb_Status_dyn" Margin="{Binding Data.SmileyMargin}"
                     Foreground="{Binding Data.Col}" FontWeight="Bold"
                     Text="{Binding Data.Status}" TextWrapping="Wrap"&gt;&lt;/TextBlock&gt;
      &lt;/StackPanel&gt;
  &lt;/Grid&gt;
  </code></pre>
  
  <p>I can set the <code>FontSize</code>s of all of the <code>TextBlock</code>s but not of the <code>TextBlock</code> which is in the <code>Viewbox</code>.</p>