您可以从应用的 PhoneApplicationFrame 获取它.由于每个 Windows Phone 应用程序都有一个框架，因此可以从应用程序的任何位置访问它.

You can get it from the app's PhoneApplicationFrame. It will be accessible from anywhere in the app since every Windows Phone app has a Frame.

((PhoneApplicationFrame)Application.Current.RootVisual).Navigate(...);