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UWP: The Master-Detail-Problem with the events SelectionChanged & LostFocus and How to Fix it

While creating apps with the Universal Windows Platform (UWP) I noticed a weird behavior, but I’m not sure if it’s a bug. Let’s just call it the “Master-Detail-Problem”.

To explain it, I stripped  down my code to the XAML-snippet below. No code-behind needed. (more…)