- Events is a way for a class to provide notifications to clients of that class when some interesting things happens to an object.
- Events are declared using delegates.
- Events can only be invoked from within the class that declared them.
- Derived classes can not directly invoke events declared within the base class.
- To call events in derived class, create a virtual protected invoking method for the event and override it in derived class.
- An event can be placed in a interface.
- When implementing the interface, the implementing class must supply a corresponding event in the class.