base

子类继承父类，重写父类，在子类中调用父类被覆盖的方法。

    public class Person
    {
        public virtual void GetInfo()//要标明是什么函数；virtual虚函数
        {
            Console.WriteLine("qqqqqqqe");
        }
    }
    class Employee:Person
    {
        public override void GetInfo()
        {
            base.GetInfo();
            Console.WriteLine("11111");
        }
        public void Info()
        {
            base.GetInfo();
        }
    }
    class Program
    {
        static void Main(string[] args)
        {


            Employee e = new Employee();
            e.Info();
            Console.WriteLine("-----------");
             e.GetInfo();
            Console.ReadLine();
        }
    }

子类的构造函数实例化是调用父类的构造函数

    public class Person
    {
        public Person()
        {
            Console.WriteLine("1234");
        }
        public Person(int i)
        {
            Console.WriteLine($"编号：{i}");
        }
    }
    class Employee:Person
    {

        public Employee() : base()
        {

        }
        public Employee(int i) : base(i)
        {
            Console.WriteLine(i);
        }

    }
    class Program
    {
        static void Main(string[] args)
        {

            Employee e = new Employee();
            Employee em = new Employee(1);
            Console.ReadLine();
        }
    }