Event Handling in .NET Using C#


In this article I discuss the event handling model in .NET using C#. The discussion starts with an introduction to the concept of delegates and then it extends that concept to events and event handling in .NET. Finally, I apply these concepts to GUI event handling using windows forms. Complete code is provided in each step of the discussions.

Event handling is familiar to any developer who has programmed graphical user interfaces (GUI). When a user interacts with a GUI control (e.g., clicking a button on a form), one or more methods are executed in response to the above event. Events can also be generated without user interactions. Event handlers are methods in an object that are executed in response to some events occurring in the application. To understand the event handling model of .Net framework, we need to understand the concept of delegate.

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