发布日期:2020-04-10
A.Use handlers for a tunneling routed event and mark the event as handled in the case of a problem.
B.Use handlers for a tunneling routed event and make the event as handled in the finally portion of a try-catch-finally code block.
C.Use handlers for a bubbling routed event and mark the event as handled in the case of a problem.
D.Use handlers for a bubbling routed event and set the Handled property of the RoutedEventArgs object to true in the catch portion of a try-catch-finally code block.
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