C# Keywords Tutorial Part 70: remove

The majority of you probably know what delegates are and how they relate to events. Do you know that event accessors may be used to encapsulate events in addition to these ideas? If not, this article will assist you in comprehending event accessors’ uses and benefits.

Contextual keywords add and remove stand in for event accessors. How do you first declare and define an event, to begin with? Here is an illustration of it:
public SampleEvent EventHandler;

When you compile this code, the equivalent compiler generated code will be:

public event EventHandler sampleEvent {
  add {
  sampleEvent += value;
  }
  remove {
  sampleEvent -= value;
  }
}

While you may not have written explicit add and remove methods in your code, the compiler has generated them for you. These methods, called event accessors, serve a crucial purpose in handling events in C#. When you subscribe to an event using the += operator or unsubscribe using the -= operator, the corresponding add or remove method is triggered automatically. This behavior happens implicitly, without you needing to write any code for it.

However, you do have the option to write these methods explicitly in your code. If you do so, your explicit code will override the automatically generated add and remove methods. It’s only necessary to write explicit methods if they perform additional tasks beyond what the compiler-generated code already does.