#615 – You Can’t Remove a Base Class Member

A subclass class inherits public members from its base class.  Below, the Terrier class inherits the Name property and the Bark method from the Dog class.

    public class Dog
    {
        public string Name { get; set; }

        public void Bark()
        {
            Console.WriteLine("Woof");
        }
    }

    public class Terrier : Dog
    {
        public string Temperament { get; set; }
    }
            Terrier jack = new Terrier();
            jack.Bark();   // Woof

The Terrier class can provide a new implementation of the Bark method:

    public class Terrier : Dog
    {
        public string Temperament { get; set; }

        public new void Bark()
        {
            Console.WriteLine("Grrr, growf!");
        }
    }

But you can’t completely remove the Bark method from the Terrier class.  If you try making the Bark method in Terrier private, when you invoke the Bark method on a Terrier object, the method in the parent Dog class will be called instead.

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About Sean
Software developer in the Twin Cities area, passionate about software development and sailing.

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