C# WPF 滚动字幕实现

<Window x:Class="Micro.Crawler.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="数据采集器" Height="350" Width="525" Loaded="Window_Loaded">
    <Grid>
        <Canvas VerticalAlignment="Top" Height="46" ClipToBounds="True" Margin="0,138,0,0">
            <StackPanel Name="content1">
                <StackPanel.RenderTransform>
                    <TranslateTransform Y="0" />
                </StackPanel.RenderTransform>
                <TextBlock FontSize="36" Foreground="Green" Text="         小的们，滚起来。。。" Width="504" />
            </StackPanel>
            <Canvas.Triggers>
                <EventTrigger RoutedEvent="Loaded">
                    <BeginStoryboard>
                        <Storyboard>
                            <DoubleAnimation From="0" To="-550" Duration="0:0:3"
                                        RepeatBehavior="Forever"
                                        Storyboard.TargetName="content1"
                                        Storyboard.TargetProperty="RenderTransform.X" />
                        </Storyboard>
                    </BeginStoryboard>
                </EventTrigger>
            </Canvas.Triggers>
        </Canvas>
    </Grid>
</Window>