WPF A Beginners guide part 3 of n

For example PreviewKeyDown (Tunnelling) and KeyDown (Bubbling). How they work In order to understand them further I have provided as part of the overall demo solution (at the top of this article) a project entitled "Part3_RoutedEventViewer" which is a standard WPF Application, that when run can be used to examine WPF commands. ................
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