What is event explain with example in C#?

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Events are user actions such as key press, clicks, mouse movements, etc., or some occurrence such as system generated notifications. Applications need to respond to events when they occur. For example, interrupts. Events are used for inter-process communication.

How do you raise an event in C#?

Raising an events is a simple step. First you check the event agaist a null value to ensure that the caller has registered with the event, and then you fire the event by specifying the event by name as well as any required parameters as defined by the associated delegate. MyEvent(message);

What is event and EventHandler?

In programming, an event is an action that occurs as a result of the user or another source, such as a mouse click. An event handler is a routine that deals with the event, allowing a programmer to write code that is executed when the event occurs.

What is the difference between event handler and event listener?

Note: Event handlers are sometimes called event listeners — they are pretty much interchangeable for our purposes, although strictly speaking, they work together. The listener listens out for the event happening, and the handler is the code that is run in response to it happening.

What is an Eventhandler?

In programming, an event handler is a callback routine that operates asynchronously once an event takes place. It dictates the action that follows the event. The programmer writes a code for this action to take place. An event is an action that takes place when a user interacts with a program.

What are EventArgs C#?

EventArgs is also the class you use when an event does not have any data associated with it. When you create an event that is only meant to notify other classes that something happened and does not need to pass any data, include the EventArgs class as the second parameter in the delegate. You can pass the EventArgs.

What is an event ARG?

EventArgs e is a parameter called e that contains the event data, see the EventArgs MSDN page for more information. Object Sender is a parameter called Sender that contains a reference to the control/object that raised the event. Event Arg Class: http://msdn.microsoft.com/en-us/library/system.eventargs.aspx.