In what situations does NavigationService.CanGoBack return false?

Question

Before the call, NavigationService.GoBack()we need to check if it is NavigationService.CanGoBacktrue, but what are the situations in which it NavigationService.CanGoBackreturns false?

Answer 1

CanGoBack returns false if there is nothing in the navigation history. There are times when the most recent entry (multiple navigators) may not have been added for the current navigator.

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Answer 2

As Jacob pointed out, CanGoBack will be false if you are at the root of BackStack navigation. It may also be incorrect if you replace the root frame with a new one that also has no pages.