Check if we want a generic WeakEvent implementation

[Felix-CodingClimber]

Examples see:

• https://www.meziantou.net/weak-events-in-csharp.htm
• https://github.com/thomaslevesque/WeakEvent
• https://github.com/jbe2277/waf

Examples on how we could write unit tests to check if the weak ref works with garbage collection:

• https://stackoverflow.com/questions/15460362/how-to-tell-if-an-object-has-been-garbage-collected