How to create a COM object in a UWP application? (C#)

Question

Question: How to create COM object in a Universal Windows Platform (UWP) application?

Motivation: I want to switch from WPF to UW

Answer 1

On the other site, the UWP/ WinRT way seems the only way MS is going on there OS for security reasons. I don't know if the Sandbox would be able to detect on a old school custom COM object called from allowed object a not allowed action. I hope this is possible for the Sandbox.