‫الگوی بازدیدکننده Visitor Pattern

 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