c#属性

 class Program
    {
       static void Main(string[] args)
        {
            ceshi wo;
           Student av = new Student();
           wo=new ceshi(av.Sum);
           ceshi wo1=new ceshi(av.Avg);
           

            av.Age = 20;
            av.Shuxue = 100;
            av.Yingyu = 150;
            av.Yuwen = 120;
            Console.WriteLine("总成绩为{0},\n平均值为{1}", wo(av.Shuxue, av.Yuwen, av.Yingyu), wo1(av.Shuxue, av.Yuwen, av.Yingyu));
            Console.ReadKey();

        }

 delegate double ceshi(double a, double b, double c);
    class Student
    {
        public double Sum(double a, double b, double c)
        {

            return a + b + c;
        }
        public double Avg(double a, double c, double b)
        {

            return (a + b + c) / 3;
        }
        private string name;
        private char sex;
        private int age;
        private double shuxue;
        private double yuwen;
        private double yingyu;
        
        public string Name {
            set {name = value;}
            get { return name; }
          }
        public int Age {
            set { age = value; }
            get { return age; }
        
        }
        public double Shuxue
        {
            set { shuxue = value; }
            get { return shuxue; }

        }
        public double Yingyu
        {
            set { yingyu = value; }
            get { return yingyu; }

        }
        public double Yuwen
        {
            set { yuwen = value; }
            get { return yuwen; }

        }
       
    
    }