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Using DiscreteStringKeyFrame

<Window x:Class="KeyFrameAnimation"   xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"   xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"   Title="Key-Frame Animation" Height="200" Width="300">   <StackPanel Margin="15">     <TextBlock Name="label" Block.TextAlignment="Center" Foreground="Blue" />     <Rectangle Name="rect" Width="200" Height="100" Stroke="Blue" Margin="10">       <Rectangle.Fill>         <LinearGradientBrush StartPoint="0,0" EndPoint="1,0">           <GradientStop Offset="0" />           <GradientStop Offset="1" />         </LinearGradientBrush>       </Rectangle.Fill>     </Rectangle>     <StackPanel.Triggers>       <EventTrigger RoutedEvent="StackPanel.Loaded">         <EventTrigger.Actions>           <BeginStoryboard>             <Storyboard>               <StringAnimationUsingKeyFrames Storyboard.TargetName="label" Storyboard.TargetProperty="(TextBlock.Text)"                 RepeatBehavior="Forever">                 <DiscreteStringKeyFrame Value="Colormap: Spring" KeyTime="0:0:0" />                 <DiscreteStringKeyFrame Value="Colormap: Summer" KeyTime="0:0:5" />                 <DiscreteStringKeyFrame Value="Colormap: Autumn" KeyTime="0:0:10" />                 <DiscreteStringKeyFrame Value="Colormap: Winter" KeyTime="0:0:15" />                 <DiscreteStringKeyFrame Value="Colormap: Cool" KeyTime="0:0:20" />                 <DiscreteStringKeyFrame Value="Colormap: Spring" KeyTime="0:0:25" />               </StringAnimationUsingKeyFrames>             </Storyboard>           </BeginStoryboard>         </EventTrigger.Actions>       </EventTrigger>     </StackPanel.Triggers>   </StackPanel> </Window>