C#教程之C#-构造函数中base

base 
是调用基类的有参数构造函数 

因为在子类不能直接继承父类的构造函数

 

实例

using System;
using System.Collections.Generic;
using System.Text;
namespace ConsoleApp1
{
        public class BaseFather
        {
                public BaseFather()
                {
                        Console.WriteLine("this is not arguments in base father constructor");
                }
                public BaseFather(string arg)
                {
                        Console.WriteLine("there is one argument in base father constructor");
                }
        }
        public class Base :    BaseFather
        {
                public Base() : base() // 继承无参构造函数
                {
                        Console.WriteLine("no arguments in base constructor");
                }
                public Base(string a) : base(a) // 继承有参构造函数
                {
                        Console.WriteLine("there is one argument in base constructor");
                }
                static void Main(string[] args)
                {
                        Base B1 = new Base();
                        Base B2 = new Base("s");
                        Console.ReadKey();
                }
        }
}

结果