#330 - Derived Classes Do Not Inherit Constructors

A derived class inherits all of the members of a base class except for its constructors.

You must define a constructor in a derived class unless the base class has defined a default (parameterless) constructor.  If you don’t define a constructor in the derived class, the default constructor in the base class is called implicitly.

When you define a constructor in a derived class, you can call a constructor in the base class by using the base keyword.

Here’s an example:

 1 public class Dog

 2 {

 3     public string Name { get; set; }

 4     public int Age { get; set; }

 5 

 6     public Dog(string name, int age)

 7     {

 8         Name = name;

 9         Age = age;

10     }

11 }

12 

13 public class Terrier : Dog

14 {

15     public string Attitude { get; set; }

16 

17     // Call the Name/Age constructor in the base class

18     public Terrier(string name, int age, string attitude)

19         : base(name, age)

20     {

21         Attitude = attitude;

22     }

23 }

 原文地址：#330 - Derived Classes Do Not Inherit Constructors