Message in Chinese (Traditional) (中文(繁體))
'<var>X</var>' 根項目必須實作 IProvideCustomContentState,或是 Navigating 事件處理常式必須設定 NavigatingCancelEventArgs.ContentStateToSave 屬性。
Unlocalized message
'<var>X</var>' root element must implement IProvideCustomContentState, or a Navigating event handler must set NavigatingCancelEventArgs.ContentStateToSave property.
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