ElapsedEventHandler

ElapsedEventHandler is a delegate type in the .NET Framework used for handling events that occur after a specified interval. It is primarily associated with the System.Timers.Timer class. When the timer's elapsed event fires, it invokes methods that match the signature of the ElapsedEventHandler delegate.

The delegate is defined as public delegate void ElapsedEventHandler(object sender, ElapsedEventArgs e). This means any method designed to handle the elapsed event must accept two arguments: an object representing the source of the event (typically the Timer instance) and an ElapsedEventArgs object. The ElapsedEventArgs class provides information about the elapsed event, such as the time the event occurred.

To use ElapsedEventHandler, you typically create an instance of a Timer, subscribe a method to its Elapsed event, and then start the timer. The subscribed method will be executed each time the timer's interval elapses. This mechanism is useful for performing tasks at regular intervals, such as updating a UI, checking for updates, or performing background operations. It provides a convenient way to manage time-based events within a .NET application.