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Created attachment 22978 [details]
Screenshot with partial output of the C++ exception
While running an app, any change in UI triggers this exception which slows down the app tremendously while in debug mode.
The exception isn't blocking, but is only printed out to console, there are a gazillion of these line-pairs for almost any UI change:
Exception thrown at 0x745DB802 in Hatzoloh.UWP.exe: Microsoft C++ exception: [rethrow] at memory location 0x00000000.
Exception thrown at 0x745DB802 in Hatzoloh.UWP.exe: Microsoft C++ exception: EEMessageException at memory location 0x07536484.
The 2nd line's memory location changes with each line-pair.
Also reported here: https://forums.xamarin.com/discussion/97944/exception-thrown-at-0x745db802-in-myproject-uwp-exe-microsoft-c-exception
Attached is a screenshot of what it looks like.
Are you able to reliably reproduce this to the point where you can share a project? I am setting this to needinfo until we can get more information for investigating.
I managed to address the issue by settings the options under UWP Project Properties->Debug->Debugger Type to "Managed Only".