Assembly: System.Windows (in System.Windows.dll)
You can manipulate the contents of the TriggerActionCollection, but you cannot replace it. You set the value in XAML by placing one or more BeginStoryboard elements as the child elements of an EventTrigger object. You do not typically specify an EventTrigger.Actions property element, because is the XAML content property of EventTrigger.
For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.