知识点

  var siz = new
            {
                id = 1,
                name = "xiaohua",
                size = 4,

            };

            Console.WriteLine("{0},{1},{2}", siz.id, siz.name, siz.size);

 public delegate string sd(int a, int b);

 public void show()
        {
            sd s = new sd(this.qiu);


            sd s1 = new sd(delegate (int a, int b)
        {
            return (a + b).ToString();

        });


            Console.WriteLine(s.Invoke(3, 5));

        }

 public string qiu(int a, int b)
        {
            return (a + b).ToString();

        }