Storyboard.SkipToFill Method
Advances the current time of the storyboard's clock to the end of its active period.
Namespace: System.Windows.Media.Animation
Assembly: System.Windows (in System.Windows.dll)
If AutoReverse is set to true, the end of the active period is the starting frame of the Storyboard.
If RepeatBehavior is set to anything other than Forever, SkipToFill works as expected. If RepeatBehavior is set to Forever, then Silverlight throws an InvalidOperation exception, similar to WPF, because a filling state will never be reached.
For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.