C#学习.交换两个数的值

        static void Swap(ref int a, ref int b)
        {
            int t;
            t = a;
            a = b;
            b = t;
        }
        static void Main(string[] args)
        {
            int a = 1;
            int b = 3;
            Swap(ref a, ref b);
            Console.WriteLine(\”a={0},b={1}\”, a, b);
            Console.ReadLine();
        }