UI Controls Silverlight

    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' 
    mc:Ignorable='d' 
    d:DesignWidth='640' 
    d:DesignHeight='480'>
  
              Name="MyFadingText"
        Width="640" Height="100" FontSize="48" FontWeight="Bold" Foreground="Maroon">
        This is fading text
        
          
            
              
                                  Storyboard.TargetName="MyFadingText" 
                  Storyboard.TargetProperty="(TextBlock.Opacity)"
                  From="1.0" To="0.0" Duration="0:0:5" 
                  AutoReverse="True" RepeatBehavior="Forever" />