Assembly: System.Windows (in System.Windows.dll)
If the item is a UIElement with its own peer as reported by Owner, then that UIElement receives focus. If there is on owner, but there is a container peer (which could be ItemsControlAutomationPeer, ListBoxAutomationPeer, or another class) then the container peer receives focus. Finally, if there is no container peer, then this method does nothing.
For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.