#361 – An Abstract Property Has No Implementation

You can declare a property as abstract, indicating that it has no implementation in the base class.  The base class indicates the property’s type and whether it has get and set accessors in any derived classes.

A base class that defines an abstract property must also be marked as abstract itself.  It wouldn’t make sense to create instances of the base class, since the implementation for the abstract property is missing.

A derived class must provide the implementation (in get/set accessors) for any properties that are abstract in the base class.

Defining an abstract property:

    public abstract class Dog
    {
        public abstract string Temperament { get; }
    }

Providing an implementation for the get accessor in a derived class:

    public class Terrier : Dog
    {
        protected string temperament;
        public override string Temperament
        {
            get
            {
                return string.Format("Terrier {0} is {1}", Name, temperament);
            }
        }