public class SchedulerTester
    {
 
        public static void TestAddJob()
        {
            JobManager.Initialize();
            JobManager.AddJob(
                () => Console.WriteLine("1 minutes just passed."),
                s => s.ToRunEvery(1).Minutes()
            );
        }
 
        public static void TestUseRegistry()
        {
            var registry = new Registry();
            registry.Schedule<MyJob>().ToRunNow().AndEvery(2).Seconds();
            registry.Schedule<MyJob>().ToRunOnceIn(5).Seconds();
            registry.Schedule(() => Console.WriteLine("It's 9:15 PM now.")).ToRunEvery(1).Days().At(21, 15);
            //registry.Schedule<MyComplexJob>().ToRunNow().AndEvery(1).Months().OnTheFirst(DayOfWeek.Monday).At(3, 0);
            registry.Schedule<MyComplexJob>().ToRunNow().AndEvery(1).Seconds();
            registry.Schedule<MyJob>().AndThen<MyOtherJob>().ToRunNow().AndEvery(5).Minutes();
            JobManager.Initialize(registry);
        }
 
        public static void TestMyRegistry()
        {
            JobManager.Initialize(new MyRegistry());
        }
 
    }
 
    public class MyRegistry : Registry
    {
        public MyRegistry()
        {
            // Schedule an ITask to run at an interval
            Schedule<MyJob>().ToRunNow().AndEvery(2).Seconds();
 
            // Schedule an ITask to run once, delayed by a specific time interval. 
            Schedule<MyJob>().ToRunOnceIn(5).Seconds();
 
            // Schedule a simple task to run at a specific time
            Schedule(() => Console.WriteLine("Timed Task - Will run every day at 9:15pm: " + DateTime.Now)).ToRunEvery(1).Days().At(21, 15);
 
            // Schedule a more complex action to run immediately and on an monthly interval
            Schedule(() =>
            {
                Console.WriteLine("Complex Action Task Starts: " + DateTime.Now);
                Thread.Sleep(1000);
                Console.WriteLine("Complex Action Task Ends: " + DateTime.Now);
            }).ToRunNow().AndEvery(1).Months().OnTheFirst(DayOfWeek.Monday).At(3, 0);
 
            // Schedule a job using a factory method and pass parameters to the constructor.
            Schedule(() => new MyComplexJob("Foo", DateTime.Now)).ToRunNow().AndEvery(2).Seconds();
 
            //Schedule multiple tasks to be run in a single schedule
            Schedule<MyJob>().AndThen<MyOtherJob>().ToRunNow().AndEvery(1).Minutes();
             
        }
    }
 
    public class MyJob : IJob
    {
        public void Execute()
        {
            Console.WriteLine("MyJob is Executed");
        }
    }
 
    public class MyOtherJob : IJob
    {
        public void Execute()
        {
            Console.WriteLine("MyOtherJob is Executed");
        }
    }
 
    public class MyComplexJob : IJob
    {
        private string _name { get; set; }
 
        private DateTime _date { get; set; }
 
        public MyComplexJob(string name, DateTime dateTime)
        {
            this._name = name;
            this._date = dateTime;
        }
 
        public void Execute()
        {
            Console.WriteLine($"MyComplexJob is Executed, name is {_name}, datetime:{_date.ToShortDateString()}");
        }
    }

SchedulerTester.TestUseRegistry();
 
SchedulerTester.TestMyRegistry();
 
SchedulerTester.TestAddJob();