IEnumerable IEnumerator

using System;using System.Collections.Generic;using System.Collections;namespace WroxBooks.chap05{public class MainApp{public static void Main(){Person[] people = new Person[4];people[0] = new Person("scott");people[1] = new Person("tiger");people[2] = new Person("root");people[3] = new Person("white");People peoples = new People(people);foreach(Person p in peoples){Console.WriteLine(p.Name);}Console.ReadKey();}public void Test(){var list = new List<string>();list.Add("string");}}class GenericClass<T>{}class Person{private string _name;public Person(string name){_name = name;}public string Name{get{return _name;}set{_name = value;}}}class People : IEnumerable{private Person[] _people;public People(Person[] list){_people = list;}IEnumerator IEnumerable.GetEnumerator(){return new PeopleEnumerator(_people);}}class PeopleEnumerator : IEnumerator{private Person[] _people;private int pos;public PeopleEnumerator(Person[] people){_people = people;pos = -1;}public object Current {get{if(pos > -1&&pos<_people.Length)return _people[pos];return null;}}public bool MoveNext(){pos++;return pos < _people.Length;}public void Reset(){pos = -1;}}}