public class EricSimpleJob : IJob
    {
        public Task Execute(IJobExecutionContext context)
        {
            Console.WriteLine("Hello Eric, Job executed.");
            return Task.CompletedTask;
        }
    }

    public class EricAnotherSimpleJob : IJob
    {
        public Task Execute(IJobExecutionContext context)
        {
            string filepath = @"C:\timertest.txt";

            if (!File.Exists(filepath))
            {
                using (FileStream fs = File.Create(filepath)) { }
            }

            using (StreamWriter sw = new StreamWriter(filepath, true))
            {
                sw.WriteLine(DateTime.Now.ToLongTimeString());
            }

            return Task.CompletedTask;
        }
    }

        static async Task TestAsyncJob()
        {
            var props = new NameValueCollection
            {
                { "quartz.serializer.type", "binary" }
            };
            StdSchedulerFactory schedFact = new StdSchedulerFactory(props);

            IScheduler sched = await schedFact.GetScheduler();
            await sched.Start();

            IJobDetail job = JobBuilder.Create<EricSimpleJob>()
                .WithIdentity("EricJob", "EricGroup")
                .Build();

            IJobDetail anotherjob = JobBuilder.Create<EricAnotherSimpleJob>()
                .WithIdentity("EricAnotherJob", "EricGroup")
                .Build();

            ITrigger trigger = TriggerBuilder.Create()
                .WithIdentity("EricTrigger", "EricGroup")
                .WithSimpleSchedule(x => x.WithIntervalInSeconds(5).RepeatForever())
                .Build();

            ITrigger anothertrigger = TriggerBuilder.Create()
                .WithIdentity("EricAnotherTrigger", "EricGroup")
                .WithSimpleSchedule(x => x.WithIntervalInSeconds(5).RepeatForever())
                .Build();

            await sched.ScheduleJob(job, trigger);
            await sched.ScheduleJob(anotherjob, anothertrigger);
        }

        static void Main(string[] args)
        {
            TestAsyncJob();
            Console.ReadKey();
        }