Pub/Sub pattern

While writing these codes, I was inspired by a blog post.

I did a little experiment to better understand the pub/sub pattern.

I may have many mistakes, don't forget to report what you see.

use case

• create a broker as a first step.
• then assign a new subscriber value to the broker value using the AddSubscriber method.
• You can listen to this subscribe value you created with the Listen method.
• If you don't want to use it, you can write your own method.