Storyboard.TargetName Attached Property
Gets or sets the name of the object to animate.
Namespace: System.Windows.Media.Animation
Assembly: System.Windows (in System.Windows.dll)
Dependency property identifier field: TargetNameProperty
The value of Storyboard.TargetName must refer to an existing element that has that same string assigned as its Name or x:Name attribute. For details, see the "Creating a Storyboard" section of Animation Overview.
Attempting to set Storyboard.TargetName on a running animation will cause a run-time error. However, you can retarget an existing animation is stopped or not yet running. If you do so, be careful not to retarget an animation to the wrong type of target (one that does not possess the existing Storyboard.TargetProperty). Otherwise, you will get a run-time error.
For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.