Question Event without Delegate

[JuliaAng]

This Link leads to an event- example, but works without an delegate
https://docs.microsoft.com/en-us/dot...erived-classes

I spoke last week with an autor of a book, and some others, all sayd events always needs an delegate.
I front them with this example havnt get any answer.
So, question is what do I miss here?

Julia

 

[JohnH]

// The event. Note that by using the generic EventHandler<T> event type
// we do not need to declare a separate delegate type.
public event EventHandler<ShapeEventArgs> ShapeChanged;

EventHandler(TEventArgs) Delegate (System) - enough said?