类的声明与实例化

 public class student//创建一个学生类
    {   //数据成员列表
        public string name;
        
        private uint age;
        protected char sex;
        internal string telephone;
        public string grade;
        //方法成员列表
        public void say()
        {
            Console.WriteLine("Hello， 淄博汉企");

        }
        public double Sum(double x, double y)
        {
            return x + y;
        }
    }

static void Main(string[] args)
        {//类的实例化
           student stu=new student();
           stu.name = "提莫";
           stu.grade = "淄博汉企";
           stu.telephone = "1234567";
           //其他类型的成员此处不可用
           Console.WriteLine(stu.name+stu.grade+stu.telephone);
            //方法调用
           stu.say();
           Console.Write(stu.Sum(2, 3));
           Console.ReadLine();

        }