#831 – Implementing a Copy Constructor in a Derived Class

A copy constructor is a constructor that you can define which initializes an instance of a class based on a different instance of the same class.

If a base class includes a copy constructor, you can add a copy constructor to a derived class, from which you call the copy constructor of the base class.

Here’s an example.

    public class Dog
        public string Name { get; set; }
        public int Age { get; set; }
        public DogCollar Collar { get; set; }

        // Standard constructor
        public Dog(string name, int age)
            Name = name;
            Age = age;

        public Dog(Dog otherDog)
            Name = otherDog.Name;
            Age = otherDog.Age;
            Collar = new DogCollar(otherDog.Collar);

    public class Terrier : Dog
        public double GrowlFactor { get; set; }

        public Terrier(string name, int age, double growlFactor)
            : base(name, age)
            GrowlFactor = growlFactor;

        public Terrier(Terrier otherTerrier)
            : base(otherTerrier)
            GrowlFactor = otherTerrier.GrowlFactor;

About Sean
Software developer in the Twin Cities area, passionate about .NET technologies. Equally passionate about my own personal projects related to family history and preservation of family stories and photos.

2 Responses to #831 – Implementing a Copy Constructor in a Derived Class

  1. remberry says:

    Nice example, but wich contructor is called first when using “Terrier(string name, int age, double growlFactor)” ?

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

%d bloggers like this: