Program.cs

using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace AryList
{
    class Program
    {
        static void Main(string[] args)
        {
            int[] ar = new int[] { 1, 2, 3 };
            Console.WriteLine("1. ====Show int[]==== ");
            foreach(var i in ar)
                Console.WriteLine(i);

            ArrayList alist = new ArrayList();
            int x = 0;
            decimal y = 100m;
            alist.Add(100);
            alist.Add("string");
            alist.Add(10);
            alist.Add(y);
            Console.WriteLine("2. ====Show ArrayList each type====");
            Console.WriteLine("Displayed ArrayList sub object type directly");
            Console.WriteLine("alist[0] type: {0}", alist[0].GetType());
            
            foreach (var i in alist)
            {
                Console.WriteLine(i.GetType());
                if (i.GetType() == typeof(int))
                {
                    x = x + (int)i;
                }
            }
            
            Console.WriteLine(x);
           

            List<int> list = new List<int>();
            list.Add(1);
            list.Add(2);
            list.Add(3);
            Console.WriteLine("3. ====Show List====");
            foreach(var i in list)
                Console.WriteLine(i);

            Console.WriteLine("4. ====Show List====");
            Array ary = Array.CreateInstance(System.Type.GetType("System.Int32"), 3);
            ary.SetValue(1, 0);
            ary.SetValue(2, 1);
            foreach(var i in ary)
                Console.WriteLine(i);

            System.Collections.Stack stack = new System.Collections.Stack();
            Console.WriteLine("5. ====Show Stack====");
            Console.WriteLine("===入堆疊===");
            foreach (string i in new string[3] { "我", "愛", "C#" })
            {
                stack.Push(i);
                Console.Write(i);
            }
            Console.WriteLine();
            Console.WriteLine("===出堆疊===");
            // stack.Pop();  //取堆疊值並移除
            // stack.Peek(); //取堆疊值不移除
            foreach (string i in stack)
            {
                Console.Write(i);
            }

            Console.WriteLine("6. ====Show Queue====");
            Queue queue = new Queue();
            Console.WriteLine("===入Queue===");
            foreach (string i in new string[] { "我", "愛", "C#" })
            {
                queue.Enqueue(i);
                Console.Write(i);
            }
            Console.WriteLine("");
            Console.WriteLine("===出Queue===");
            queue.Dequeue();
            queue.Peek();
            foreach (var i in queue)
            {
                Console.Write(i);

            }
            Console.ReadKey();
        }
    }
}