Cross-Page Communication
After navigation has occurred, an opportunity remains for the previous page to interact with the current page from the previous page’s OnNavigatedFrom method. This is achieved using the Content property of the NavigationEventArgs, which provides the destination PhoneApplicationPage object.
To see this in action, place a breakpoint in the OnNavigatedFrom method. When the breakpoint is hit, notice that the page being navigated to has already been instantiated and is provided in the Content property of the NavigationEventArgs (see Figure 3.8).
FIGURE 3.8 The Content property of the NavigationEventArgs contains the page being ...
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