Tweaking Storyboards with Timeline Properties
A Storyboard is more than just a simple container that associates animations with target objects and their properties. Because Storyboard derives from Timeline, it has many of the same properties discussed previously: Duration, BeginTime, SpeedRatio, AutoReverse, RepeatBehavior, and FillBehavior (and the Completed event).
The following Storyboard fades one TextBlock in and out at a time, for an effect somewhat like that of a movie trailer. The Storyboard itself is marked with a RepeatBehavior to make the entire sequence of animation repeat indefinitely. Figure 19.8 shows how this is rendered at three different spots of the sequence:
<Page ...> <Page.Resources> <
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