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Sample app for WP throws Exception on every startup
System.Exception, WinRT information: Element is already child of another element.
I cannot find any more information in the exception, so it's difficult to guess why it occurs. I guess there is some C# code somewhere in startup that puts a control into an element that has already been defined in XAML, but that's just a wild guess.
I will fix it and send a pull request, if I find what causes the exception. If someone has got a clue about this, a comment would be appreciated.