Publisher Subscriber Design Pattern with C#

pub-sub

Publisher-Subscriber (pub-sub) is a design pattern that allows loose coupling between the application components.
Also the pattern is an implementation of event-driven architecture. For implementing this pattern we will mainly write two classes Publisher Class and Subscriber Class.

The major difference in Pub-Sub design is the event channel that publisher generates to notify changes to its subscriber without any knowledge of subscriber existence.

Realtime Examples:

• Publisher class publishes an event ( like Youtube channels video notification ) for its' subscribers using an EventHandler.
• Subscriber class receives the event ( like Youtube channel subscribers ) and handles it as it's needed.
• EventHandler involved in this process of Publisher-Subscriber pattern to get notifications from Youtube Channel (Publisher) and send it to Channel subscribers.
• Publisher class and Subscriber class doesn't have to know each other they both are connected to EventHandler.
• Publisher will send the NotificationEvent to EventHandler and it will send the NotificationEvent to Subscribers.

Cheers!!