C#数组

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

namespace ArrayDemo
{
    class Program
    {

        static void Main(string[] args)
        {
            //1
            int[] myArray;
            myArray = new int[4];

            //2
            int[] myArray2 = new int[4];

            //3
            int[] myArray3 = new int[4] { 1, 2, 3, 4 };

            //4
            int[] myArray4 = new int[] { 1, 2, 3, 4 };

            //5
            int[] myArray5 = { 1, 2, 3, 4 };


            //6
            var myArray6 = new int[] { 1, 2, 3, 4 };

            int[] myArray7;
            myArray7 = new int[] { 1, 3, 4 };
            int n = myArray7.Rank;//维度


            Array intArray = Array.CreateInstance(typeof(int), 5);
            for (int i = 0; i < intArray.Length; i++)
            {
                intArray.SetValue(33, i);
            }

            for (int i = 0; i < 5; i++)
            {
                Console.WriteLine(intArray.GetValue(i));
            }

            //CreateInstance()方法有许多重载版本，可以创建多维数组和不基于0的数组
            //下面的例子就创建一个包含2X3个元素的二维数组，第一维基于1，第二维基于10
            int[] lengths = { 2, 3 };
            int[] lowerBounds = { 1, 10 };
            Array racers = Array.CreateInstance(typeof(Person), lengths, lowerBounds);
            //SetValue()方法设置数组的元素，其参数是每一维的索引
            racers.SetValue(new Person
            {
                FirstName = "Alain",
                LastName = "Prost"
            }, index1: 1, index2: 10);
            racers.SetValue(new Person
            {
                FirstName = "Emerson",
                LastName = "Fittipaldi"
            }, 1, 11);
            racers.SetValue(new Person
            {
                FirstName = "Emerson",
                LastName = "Fittipaldi"
            }, 1, 12);
            racers.SetValue(new Person
            {
                FirstName = "Emerson",
                LastName = "Fittipaldi"
            }, 2, 10);
            racers.SetValue(new Person
            {
                FirstName = "Emerson",
                LastName = "Fittipaldi"
            }, 2, 11);
            racers.SetValue(new Person
            {
                FirstName = "Emerson",
                LastName = "Fittipaldi"
            }, 2, 12);


            Console.ReadKey();
        }
    }

    //
    public class Person
    {
        public string FirstName { get; set; }
        public string LastName { get; set; }
        public override string ToString()
        {
            return String.Format("{0} {1}", FirstName, LastName);
        }
    }
}