Firing events

C# events allow you to essentially create a subscription system based on actions in your games or apps. For instance, if you wanted to send out an event whenever an item is collected, or when a player presses the spacebar, you could do that. However, when an event fires, it doesn't automatically have a subscriber, or receiver, to handle any code that needs to execute after the event action.

Any class can subscribe or unsubscribe to an event through the calling class the event is fired from; just like signing up to receive notifications on your phone when a new post is shared on Facebook, events form a kind of distributed-information superhighway for sharing actions and data across your application.

Declaring events is similar to declaring delegates in that an event has a specific method signature. We'll use a delegate to specify the method signature we want the event to have, then create the event using the delegate type and the event keyword:

public...