泛型类示意性代码补写Push()方法求助

Question

不知道我理解的泛型有误没，下面代码。通过Push方法压入新项于items数组。Push()方法的代码体应该怎么写？using System;
using System.Collections.Generic;
using System.Text;namespace ConsoleApplication1
{
    public class Print<objectType>
    {
        public objectType[] items;        public void Push(objectType item)
        {        }
    }
    class Program
    {
        static void Main(string[] args)
        {
            Print<int> stringStack = new Print<int>();
            stringStack.Push(1111111);
            stringStack.Push(2222222);
            stringStack.Push(3333333);
            foreach (int item in items)
                Console.WriteLine(item);
            Console.ReadKey();
        }    }
}

Answer 1

using System;
using System.Collections.Generic;
using System.Text;
using System.Collections;namespace ConsoleApplication1
{
    public class Print<objectType>:IEnumerable<objectType>
    {
        private List<objectType> ll = new List<objectType>();        public void Push(objectType item)
        {
            ll.Add(item);
        }        public IEnumerator<objectType> GetEnumerator()
        {
            foreach (objectType i in ll)
            {
               yield return i;
            }
        }        IEnumerator IEnumerable.GetEnumerator()
        {
            return this.GetEnumerator();
        }
    }
    class Program
    {
        static void Main(string[] args)
        {
            Print<int> stringStack = new Print<int>();
            stringStack.Push(1111111);
            stringStack.Push(2222222);
            stringStack.Push(3333333);
            foreach (int item in stringStack)
                Console.WriteLine(item);
            Console.ReadKey();
        }    }
}

Answer 2

如果是实现stack把List换成stack。ll.Add换成ll.Push

Answer 3

LS的没错，应该用list不应该用数组。