Assembly: PresentationFramework (in PresentationFramework.dll)
To be able to pause, resume, or otherwise interactively control a Storyboard, set the property of its BeginStoryboard and use a ControllableStoryboardAction object like PauseStoryboard, ResumeStoryboard, or StopStoryboard to reference this name. If the of BeginStoryboard is unspecified, the Storyboard cannot be interactively affected after it is begun; furthermore, when the Storyboard ends or enters its Fill period, the animation clocks are disposed of. See How to: Use Event Triggers to Control a Storyboard After It Starts for more information.
Available since 3.0