class Employee(string firstName, string lastName)
{
    private readonly string _firstName = firstName.Length >= 5 ? 
                                        firstName : 
                                        throw new ArgumentException("There must be atleast 5 characters");

    private readonly string _lastName = lastName;

    public string FullName()
    {
        return $"Full name  = {_firstName} {_lastName}";
    }
}

#include <iostream>

namespace SchedulerDemo.Jobs
{
    using System;
    using System.IO;
    using Quartz;

    public class HelloJob : IJob
    {
        public void Execute(IJobExecutionContext context)
        {
            // for web apps
            // string path = System.Web.Hosting.HostingEnvironment.MapPath("~/Data/Log.txt");
            
            // for desktop apps
            string path = @"C:\Log.txt";

            using (StreamWriter sw = new StreamWriter(path, true))
            {
                sw.WriteLine("Message from HelloJob " + DateTime.Now.ToString());
            }
        }
    }
}

namespace SchedulerDemo.Interfaces
{
    public interface ISchedule
    {
        void Run();
    }
}

namespace SchedulerDemo.Jobs
{
    using System;
    using Quartz;
    using Quartz.Impl;
    using SchedulerDemo.Interfaces;
    using SchedulerDemo.Jobs;

    public class HelloSchedule : ISchedule
    {
        public void Run()
        {
            //DateTimeOffset startTime = DateBuilder.NextGivenSecondDate(null, 2);
            DateTimeOffset startTime = DateBuilder.FutureDate(2, IntervalUnit.Second);

            IJobDetail job = JobBuilder.Create<HelloJob>()
                                       .WithIdentity("job1")
                                       .Build();

            ITrigger trigger = TriggerBuilder.Create()
                                             .WithIdentity("trigger1")
                                             .StartAt(startTime)
                                             .WithSimpleSchedule(x => x.WithIntervalInSeconds(10).WithRepeatCount(2))
                                             .Build();

            ISchedulerFactory sf = new StdSchedulerFactory();
            IScheduler sc = sf.GetScheduler();
            sc.ScheduleJob(job, trigger);

            sc.Start();
        }
    }
}

DateTimeOffset startTime = DateBuilder.FutureDate(2, IntervalUnit.Second);

IJobDetail job = JobBuilder.Create<HelloJob>()
                           .WithIdentity("job1")
                           .Build();

ITrigger trigger = TriggerBuilder.Create()
                                 .WithIdentity("trigger1")
                                 .StartAt(startTime)
                                 .WithSimpleSchedule(x => x.WithIntervalInSeconds(10).WithRepeatCount(2))
                                 .Build();

ISchedulerFactory sf = new StdSchedulerFactory();
IScheduler sc = sf.GetScheduler();
sc.ScheduleJob(job, trigger);

sc.Start();

ISchedule myTask = new HelloSchedule();
myTask.Run();

 public interface IElement
    {
        void Accept(IElementVisitor visitor);
    }

    public interface IElementVisitor
    {
        void Visit(Manager manager);
        void Visit(Employee manager);
        void Visit(Worker manager);
    }

 public class  Manager: IElement
    {
        public int WorkingHour = 8;
        public int Wife = 1;
        public int Children = 3;
        public int OffDays = 6;
        public int OverHours = 12;

        public void Accept(IElementVisitor visitor)
        {
            visitor.Visit(this);
        }
    }

public class Employee: IElement
    {
        public int WorkingHour = 8;
        public int Wife = 1;
        public int Children = 3;
        public int OffDays = 6;
        public int OverHours = 12;

        public void Accept(IElementVisitor visitor)
        {
            visitor.Visit(this);
        }
    }

public class Worker:IElement
    {
        public int WorkingHour = 8;
        public int Wife = 1;
        public int Children = 3;
        public int OffDays = 6;
        public int OverHours = 12;

        public void Accept(IElementVisitor visitor)
        {
            visitor.Visit(this);
        }
    }

 class SalaryCalculator:IElementVisitor
    {
        public void Visit(Manager manager)
        {
            var salary = manager.WorkingHour*10000;
            salary += manager.Wife*25000;
            salary += manager.Children*20000;
            salary -= manager.OffDays*5000;
            Console.WriteLine("Manager's Salary is " + salary);
        }

        public void Visit(Employee employee)
        {
            var salary = employee.WorkingHour * 7000;
            salary += employee.Wife * 15000;
            salary += employee.Children * 10000;
            salary -= employee.OffDays * 6000;
            Console.WriteLine("Employee's Salary is " + salary);
        }

        public void Visit(Worker worker)
        {
            var salary = worker.WorkingHour * 6000;
            salary += worker.Wife * 5000;
            salary += worker.Children * 2000;
            salary -= worker.OffDays * 7000;
            Console.WriteLine("Worker's Salary is " + salary);
        }
    }

    class WageCalculator:IElementVisitor
    {
        public void Visit(Manager manager)
        {
            var wage = manager.OverHours*30000;
            Console.WriteLine("Employee's wage is " + wage);
        }

        public void Visit(Employee employee)
        {
            var wage = employee.OverHours * 20000;
            Console.WriteLine("Employee's wage is " + wage);
        }

        public void Visit(Worker worker)
        {
            var wage = worker.OverHours * 15000;
            Console.WriteLine("Employee's wage is " + wage);
        }
    }

class FinancialSystem
    {
        private readonly IList<IElement> _elements;

        public FinanceSystem()
        {
            _elements=new List<IElement>();
        }

        public void Attach(IElement element)
        {
            _elements.Add(element);
        }

        public void Detach(IElement element)
        {
            _elements.Remove(element);
        }

        public void Accept(IElementVisitor visitor)
        {
            foreach (var element in _elements)
            {
                element.Accept(visitor);
            }
        }
    }

Manager's Salary is 135000
Employee's Salary is 65000
Worker's Salary is 17000
Manager's wage is 360000
Employee's wage is 240000
Worker's wage is 180000