C#动态修改数组维数!

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1 using System;
2 using System.Text;
3 namespace ConsoleApplication2
4 {
5  class Class1
6  {
7   [STAThread]
8   static void Main(string[] args)
9   {
10    int[] arr=new int[]{1,2,3};
11    foreach(int x in arr)
12     Console.Write(x+" ");
13    Console.WriteLine();
14    arr=(int[])Redim(arr,5);
15    foreach(int x in arr)
16     Console.Write(x+" ");
17    Console.WriteLine();
18    arr=(int[])Redim(arr,2);
19    foreach(int x in arr)
20     Console.Write(x+" ");
21    Console.WriteLine();
22   }
23   public static Array Redim(Array origArray,int desiredSize)
24   {
25    Type t=origArray.GetType().GetElementType();
26    Array newArray=Array.CreateInstance(t,desiredSize);
27    Array.Copy(origArray,0,newArray,0,Math.Min(origArray.Length,desiredSize));
28    return newArray;
29   }
30  }
31 }