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Why does NavigationService in Silverlight / WP7 use strings over classes?

Given that C # tends to be more of a strongly typed language, why did designers choose URI-based navigation across classes?

NavigationService.Navigate(new Uri("/MyPage.xaml", UriKind.Relative))

does not work at runtime if MyPage is missing.

If there was a method supporting passing PhoneApplicationPage as an argument, for example

NavigationService.Navigate(new MyPage());

Errors related to navigation can be detected at compile time.

Why is this not an integral design in Silverlight / WP7?

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5 answers

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