title: How to change TextBlock foreground color on text changed for Windows Phone 8.1 (WinRT)?
body: <p>My TextBlock is bound to my viewmodel and I'd like to flash the text when it changes. I'm finding it difficult to implement this for Windows Phone 8.1 (WinRT). I'm thinking I have to use an EventTriggerBehavior and change the textBlock to a textBox then select the "TextChanged" event. Is there an easy way to do this?</p>
  
  <p>Here's my attempt at doing so with a TextBox and using the EventTriggerBehavior.</p>
  
  <pre><code>&lt;TextBlock x:Name="TestTypeTextBox"
             TextWrapping="Wrap" 
             Text="{Binding TestTypeText}" 
             FontSize="48" TextAlignment="Center" 
             HorizontalAlignment="Center" 
             VerticalAlignment="Center" 
             Margin="0" 
             FontWeight="Bold" 
             FontFamily="Segoe UI Black"
             Foreground="White" 
             Padding="0"&gt;
      &lt;i:Interaction.Behaviors&gt;
          &lt;core:EventTriggerBehavior EventName="SelectionChanged"&gt;
              &lt;Media:ControlStoryboardAction Storyboard="{StaticResource FlashingText}"/&gt;
          &lt;/core:EventTriggerBehavior&gt;
      &lt;/i:Interaction.Behaviors&gt;
  &lt;/TextBlock&gt;
  </code></pre>