C#實現矩陣的轉置

static void ArrayCon( ref int [ ,]a,int n) {
            int i, j, t;
            for(i=0;i<n;i++)
                for (j = 0; j < i; j++)
                {
                    t = a[i, j];
                    a[i,j] = a[j, i];
                    a[j, i] = t;
                }

        }
        static void Main(string[] args)
        {
            const int N = 3;
            int i, j;
            int[,] arr = new int[N, N];
            Random random = new Random();
            for (i = 0; i < N; i++)
                for (j = 0; j < N; j++)
                    arr[i, j] = random.Next(1, 100);
            Console.Write("轉置之前：");
            for (i = 0; i < N;i++ )
            {
                Console.WriteLine();
                for (j = 0; j < N; j++)
                    Console.Write("{0} ",arr[i,j]);
            }
            ArrayCon(ref arr, N);
            Console.Write("\n轉置之後：");
            for (i = 0; i < N;i++ )
            {
                Console.WriteLine();
                for (j = 0; j < N; j++)
                    Console.Write("{0} ",arr[i,j]);

            }
            Console.ReadKey();
        }

    }