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System.Timers Namespace

The System.Timers namespace provides the Timer component, which allows you to raise an event on a specified interval.

The Timer component is a server-based timer, which allows you to specify a recurring interval at which the Elapsed event is raised in your application. You can then handle this event to provide regular processing. For example, suppose you have a critical server that must be kept running 24 hours a day, 7 days a week. You could create a service that uses a Timer to periodically check the server and ensure that the system is up and running. If the system is not responding, the service could attempt to restart the server or notify an administrator.

The server-based Timer is designed for use with worker threads in a multithreaded environment. Server timers can move among threads to handle the raised Elapsed event, resulting in more accuracy than Windows timers in raising the event on time. For more information on server-based timers, see Introduction to Server-Based Timers.

Namespace hierarchy


Class Description
ElapsedEventArgs Provides data for the Elapsed event.
Timer Generates recurring events in an application.
TimersDescriptionAttribute Sets the description that visual designers can display when referencing an event, extender, or property.


Delegate Description
ElapsedEventHandler Represents the method that will handle the Elapsed event of a Timer.

See Also

.NET Framework Class Library