Hello,

You can use the Timers Class and do the following:

using System.Timers;
//...

        private readonly Timer _timer = new Timer();

        protected override void OnStart()
        {
            _timer.Elapsed += OnTimedEvent; //  OnTimedEvent is called at each timer tick
            _timer.Interval = (Interval)  * 3600 * 1000; // Timer will tick every Interval (milliseconds)
            _timer.Enabled = true; // Enable the timer
            _timer.Start(); // Start the timer

        }

        private void OnTimedEvent(object sender, ElapsedEventArgs e)
        {
            // Your logic here
        }