Events in C#

Data Access and Operations - slide 39 : 45

Events in C#

An event is a variable of a delegate type

A few restrictions apply compared with other variables of delegate types

Events can be used for handling interactive events in graphical user interfaces

Restrictions on events
- An event can only be activated from within the class to which the event belongs
- From outside the class it is only possible to add (with +=) or subtract (with -=) operations to an event.
  - It is not possible to 'reset' the event with an ordinary assignment

There exists a generic delegate EventHandler<TEVentArgs> which is intended to be used as the type of standard events in .NET