I stumbled over a few bugs in WPF (worked in WPF3.5, would hang in WPF4), which ...

		beagle3 on Oct 9, 2017 \| parent \| context \| favorite \| on: Microsoft gives up on Windows 10 Mobile I stumbled over a few bugs in WPF (worked in WPF3.5, would hang in WPF4), which were, for at least 4 years, documented and "WONTFIX" with no acceptable workaround (workaround provided slows things down by a factor of 10 under some circumstances). Maybe it's fixed with the reinvigorated WPF on Win10. I don't care anymore, but I do caution anyone to ever use any MS Technology younger than 15 years.

I'd say .Net Core is worth considering, but no real UI story as of yet... pretty nice for services though.