Implement unregistering events

[Antoni-Czaplicki]

Implement unregistering events and add missing System import

[BOLL7708]

I just merged this into a separate branch to test things out, as I was curious about the system imports. My IDE, Rider, reports them as unnecessary and wants to remove them again, but I guess your IDE complained about them not being included, @Antoni-Czaplicki ?

Edit: Now I'm thinking that maybe it is due to the project I'm editing this submodule in, maybe the parent class already has those imports and as such it deems them unnecessary in the class library.

Edit2: Alright, I did not have them in as the project settings include <ImplicitUsings>enable</ImplicitUsings> which uses System by default without it being included. Is this something that is not working in your project(s)? I can turn it off for compatibility but I'm interested.

[BOLL7708]

And I ended up just turning off implicit usings, now merged into master 😁

[Antoni-Czaplicki]

Hmm, I’m also using Rider and I’ve added this imports because the project wouldn’t compile without them. I just checked and I don’t have <ImplicitUsings>enable</ImplicitUsings>, so it’s probably the reason why it occurred. Anyway I think it’s better to leave this imports in files to make ot work on both type of projects

[BOLL7708]

Hello dear contributor!

I have re-licensed this project as GPLv3, and I have plans to combine my various VR applications into a single toolkit and publish that freely on Steam. That requires the project to be licensed to me using LGPLv3 as well, as Steam does not allow the full GPLv3 license, so I've added a new Contributor License Agreement to this project to facilitate this.

I hope you are willing to sign this agreement to accept the new licensing changes. You can do this by editing the CLA.md file directly here on GitHub and submit it as a pull request. Any contribution that does not get re-licensed will be eventually be removed from the project. If you have any questions, don't hesitate to reply to me here.

Thank you for your consideration!