Silverlight动画问题

Doe的人知道是什么毛病标记下面Silverlight动画问题

<UserControl 
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
    x:Class="DoubleAnim.MainPage" 
    Width="640" Height="480"> 
    <UserControl.Resources> 
     <Storyboard x:Name="Storyboard1"> 
      <DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(Canvas.Left)" Storyboard.TargetName="objectToAnimate"> 
       <EasingDoubleKeyFrame KeyTime="0" Value="0"/> 
       <EasingDoubleKeyFrame KeyTime="0:0:1" Value="400"/> 
      </DoubleAnimationUsingKeyFrames>     
     </Storyboard> 
    </UserControl.Resources> 

    <Grid x:Name="LayoutRoot" Background="White"> 
     <Rectangle x:Name="objectToAnimate" Fill="#FF0000F9" HorizontalAlignment="Left" Canvas.Top="164" Height="100" Stroke="Black" VerticalAlignment="Top" Width="192" RadiusY="8" RadiusX="8" > 
     </Rectangle> 
     <Button Content="Button" Height="23" HorizontalAlignment="Left" Margin="132,180,0,0" Name="button1" VerticalAlignment="Top" Width="75" Click="button1_Click" /> 
    </Grid> 
</UserControl>

一切看起来不错，但它不是工作：（（母鹿的Silverlight知道如何动画canvas.top和canvas.left 或者，也许是什么？我错过了什么？

来源

2011-06-08 magic987