数组是对相同类型的一组数据的封装。数组定义的时候，要说明是对哪一种类型的封装，并且要指定长度。

1 using System;  2 using System.Collections.Generic;  3 using System.Linq;  4 using System.Text;  5   6 namespace TestArrayList  7 {  8     class Program  9     { 10         static void Main(string[] args) 11         { 12             //System.Array 13             //1、数组[]特定类型、固定长度 14             string[] str1 = new string[3]; 15             str1[0] = "a"; 16             str1[1] = "b"; 17             str1[2] = "c"; 18             Console.WriteLine(str1[2]); 19  20             string[] str2 = new string[] { "a", "b", "c" }; 21             Console.WriteLine(str2[0]); 22  23             string[] str3 = { "a", "b", "c" }; 24             Console.WriteLine(str3[0]); 25  26             //2.二维数组 27             //int[,] intArray = new int  28             int[,] intArray = new int[2, 3]; 29             intArray[0, 0] = 1; 30             intArray[0, 1] = 11; 31             intArray[0, 2] = 111; 32             intArray[1, 0] = 2; 33             intArray[1, 1] = 22; 34             intArray[1, 2] = 222; 35             Console.WriteLine("{0},{1},{2}", intArray[0, 0], intArray[0, 1], intArray[0, 2]); 36             Console.WriteLine("{0},{1},{2}", intArray[1, 0], intArray[1, 1], intArray[1, 2]); 37  38             //3多维数组 39             int[, ,] intArray1 = new int[,,] 40             { 41                {
   {
   1,1},{
   11,11},{
   111,111}}, 42                {
   {
   2,2},{
   22,22},{
   33,33}}, 43                {
   {
   3,3},{
   33,33},{
   333,333}} 44             }; 45             Console.WriteLine("多维数组"); 46             Console.WriteLine("{0},{1},{2},{3},{4},{5}", intArray1[0, 0, 0], intArray1[0, 0, 1], intArray1[0, 1, 0], intArray1[0, 1, 1], intArray1[0, 2, 0], intArray1[0, 2, 1]); 47             Console.WriteLine("{0},{1},{2},{3}", intArray1[1, 0, 0], intArray1[1, 0, 1], intArray1[1, 1, 0], intArray1[1, 1, 1]); 48             Console.WriteLine("{0},{1},{2},{3},{4},{5}", intArray1[2, 0, 0], intArray1[2, 0, 1], intArray1[2, 1, 0], intArray1[2, 1, 1], intArray1[2, 2, 0], intArray1[2, 2, 1]); 49  50             //4交错数组即数组的数组 51             int[][] intArray2 = new int[4][]; 52             intArray2[0] = new int[] { 1 }; 53             intArray2[1] = new int[] { 2, 22 }; 54             intArray2[2] = new int[] { 3, 33, 333 }; 55             intArray2[3] = new int[] { 4, 44, 444, 4444 }; 56             Console.WriteLine("交错数组"); 57             for (int i = 0; i < intArray2.Length; i++) 58             { 59                 for (int j = 0; j < intArray2[i].Length; j++) 60                 { 61                     Console.WriteLine("{0}", intArray2[i][j]); 62                 } 63             } 64             Console.ReadKey(); 65             int[] myIntArray = new int[5] { 1, 2, 3, 4, 5 }; 66             Object[] myObjArray = new Object[5] { 26, 27, 28, 29, 30 }; 67             Console.WriteLine("Initially,"); 68             Console.Write("integer array:"); 69             PrintValues(myIntArray); 70             Console.Write("Object array: "); 71             PrintValues(myObjArray); 72  73             System.Array.Copy(myIntArray, myObjArray, 2); 74  75             Console.WriteLine("\n After copying the first two elements of the integer array to the Object array."); 76             Console.Write("integer array:"); 77             PrintValues(myIntArray); 78             Console.Write("Object array: "); 79             PrintValues(myObjArray); 80  81             System.Array.Copy(myObjArray, myObjArray.GetUpperBound(0) - 1, myIntArray, myIntArray.GetUpperBound(0) - 1, 2); 82  83             Console.WriteLine("\nAfter copying the last two elements of the object array to the integer array,"); 84             Console.Write("integer array:"); 85             PrintValues(myIntArray); 86             Console.Write("Object array:"); 87             PrintValues(myObjArray); 88             Console.ReadKey(); 89         } 90  91         public static void PrintValues(Object[] myArr) 92         { 93             foreach (Object i in myArr) 94             { 95                 Console.Write("\t{0}", i); 96             } 97             Console.WriteLine(); 98         } 99 100         public static void PrintValues(int[] myArr)101         {102             foreach (int i in myArr)103             {104                 Console.Write("\t{0}", i);105             }106             Console.WriteLine();107         }108     }109 }

运行结果如下：

数组是一种数据类型，并且二维数组在图像处理中会应用。一维数组的起始下标是[0]。二维数组的起始下标是[0,0]。交错也称参差数组的起始下标是[0][0]。

数组一定是固定长度和类型确定并且有序的，这种呆板的数据类型，导致它的INSERT，非常不方便，于是有了ArrayList

那么C#中数组是引用类型？还是值类型？C#中数组是引用类型，为什么是引用类型，依据是什么？