In Windows Phone Mango update, we can use VideoBrush since we could not do that in windows phone 7 . So there is something interesting to do. We can develop more fantasitic apps. For example, we can play a video as background in our application. We want to play video in a loop also. But here comes the problem. Since there is no MediaTimeline in Silverlight for Windows Phone API. How can we repeat media playback ?
In WPF or Silverlight, we can use following code to repeat media playback.
xmlns:x ="http://schemas.microsoft.com/winfx/2006/xaml" >
< StackPanel >
<!-- The MediaElement control plays the sound. -->
< MediaElement Name ="myMediaElement" >
< MediaElement.Triggers >
< EventTrigger RoutedEvent ="MediaElement.Loaded" >
< EventTrigger.Actions >
< BeginStoryboard >
< Storyboard >
<!-- The MediaTimeline has a RepeatBehavior="Forever" which makes the media play
over and over indefinitely. -->
< MediaTimeline Source ="media\tada.wav" Storyboard.TargetName ="myMediaElement"
RepeatBehavior ="Forever" />
</ Storyboard >
</ BeginStoryboard >
</ EventTrigger.Actions >
</ EventTrigger >
</ MediaElement.Triggers >
</ MediaElement >
</ StackPanel > </ Page >
In windows phone , I find simple solution to play video in a loop. Since we can catch Media_End event, we can play again in ended event.
Another suggestion : do not play large video in your windows phone app since it will cause a little bit performance damage.
Source code can be found here : 
PS:第一次用英文写技术博客，真D疼，奈何为了学好E文，只好疼下去了，因为我坚信：疼着疼着就不疼了！
本文转自xshf12345 51CTO博客，原文链接：http://blog.51cto.com/alexis/672031，如需转载请自行联系原作者
