List泛型集合

//集合初始化器
List list = new List(){1,2,3,4,5,6,7,8,};

using System;
using System.Collections.Generic;
using System.Linq;
namespace _074_List泛型集合
{
    class Program
    {
        static void Main(string[] args)
        {
            //List 在 using System.Collections.Generic;空间下
            //创建泛型集合对象 List<Type>  Type一旦确定，该集合只能使用该Type
            List<int> list = new List<int>();
            list.Add(0); 
            list.Add(1);
            list.Add(2);
            list.AddRange(new int[] { 3, 4, 5, 6, 7, 8 });
            list.AddRange(list);
            for (int i = 0; i < list.Count; i++)
            {
                Console.WriteLine(list[i]);
            }
            Console.WriteLine(list);
            Console.WriteLine("==============================");
            //List泛型集合可以转换成数组
            int[] nums = list.ToArray();
            for (int i = 0; i < nums.Length; i++)
            {
                Console.WriteLine(nums[i]);
            }
            Console.WriteLine("==============================");
            //数组可以转换成List泛型集合
            List<int> list2 = nums.ToList<int>();
            for (int i = 0; i < list2.Count; i++)
            {
                Console.WriteLine(list2[i]);
            }
            Console.WriteLine(list2);
            Console.WriteLine("==============================");
            char[] ch = { 'a', 'b', 'c', 'd', 'e' };
            List<char> list3 = ch.ToList<char>();
            foreach (char item in list3)
            {
                Console.WriteLine(item);
            }
            Console.WriteLine("==============================");
            Console.ReadKey();
        }
    }
}