c#拷贝数组

拷贝数组
int[] pains={9,3,4,5};
int[] copy=new int[pains.Length];
pains.CopyTo(copy,0);
Array.Copy(pains.copy,copy,Length);
int[] copy=(int[])pains.Clone();
二维数组：
int[,] items=new int[2,3]