What is the best way to implement a “timer”? [duplicate]

Answer 1

Reference ServiceBase to your class and put the below code in the OnStartevent:

Constants.TimeIntervalValue = 1 (hour)..Ideally you should set this value in config file.

StartSendingMails = function name you want to run in the application.

 protected override void OnStart(string[] args)
        {
            // It tells in what interval the service will run each time.
            Int32 timeInterval = Int32.Parse(Constants.TimeIntervalValue) * 60 * 60 * 1000;
            base.OnStart(args);
            TimerCallback timerDelegate = new TimerCallback(StartSendingMails);
            serviceTimer = new Timer(timerDelegate, null, 0, Convert.ToInt32(timeInterval));
        }