Message in Chinese (Simplified) (中文(简体))
“<var>X</var>”根元素必须实现 IProvideCustomContentState,或者 Navigating 事件处理程序必须设置 NavigatingCancelEventArgs.ContentStateToSave 属性。
Unlocalized message
'<var>X</var>' root element must implement IProvideCustomContentState, or a Navigating event handler must set NavigatingCancelEventArgs.ContentStateToSave property.
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