using System;
using System.Collections.Generic;
public class Employee
{
public string Name;
public string Title;
public Employee(string name, string title)
{
Name = name;
Title = title;
}
public override string ToString()
{
return string.Format("{0} ({1})", Name, Title);
}
}
public class EmployeeList
{
private List<Employee> employeeList = new List<Employee>();
public IEnumerator<Employee> GetEnumerator()
{
foreach (Employee tm in employeeList)
{
yield return tm;
}
}
public IEnumerable<Employee> Reverse
{
get
{
for (int c = employeeList.Count - 1; c >= 0; c--)
{
yield return employeeList[c];
}
}
}
public IEnumerable<Employee> FirstTwo
{
get
{
int count = 0;
foreach (Employee tm in employeeList)
{
if (count >= 2)
{
yield break;
}
else
{
count++;
yield return tm;
}
}
}
}
public void AddEmployee(Employee member)
{
employeeList.Add(member);
}
}
public class MainClass
{
public static void Main()
{
EmployeeList employeeList = new EmployeeList();
employeeList.AddEmployee(new Employee("A", "AA"));
employeeList.AddEmployee(new Employee("B", "BB"));
employeeList.AddEmployee(new Employee("C", "CC"));
Console.WriteLine("Enumerate using default iterator:");
foreach (Employee member in employeeList)
{
Console.WriteLine(" " + member.ToString());
}
Console.WriteLine("Enumerate using the FirstTwo iterator:");
foreach (Employee member in employeeList.FirstTwo)
{
Console.WriteLine(" " + member.ToString());
}
Console.WriteLine("Enumerate using the Reverse iterator:");
foreach (Employee member in employeeList.Reverse)
{
Console.WriteLine(" " + member.ToString());
}
}
}
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