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I'm not fan of this UI. I prefer window 10 standard ui wich is provided in the SDK for UWP. Check [Hangups-UWP](https://github.com/kfechter/Hangups-UWP) their UI is Standard windows 10

Yeah Nice ! But is it good to "fake" a system on another ? It sounds like having an osx like app on windows. I don't know if it is...

It was the initial idea. Having both UWP and desktop app. Maybe you're right, we have to finish a desktop version with a cool UI. Material Design is great but...

You're right. Let's go for material design.