#601 – A Class Can Both Inherit from A Parent Class and Implement an Interface
June 8, 2012 Leave a comment
Every user-defined class inherits from exactly one other class. You can either explicitly specify the class to inherit from, or the class can implicitly inherit from System.Object.
A user-defined class may optionally implement one or more interfaces.
A class may therefore both inherit from a parent class and also implement one or more interfaces. All of the declarations listed below are valid class declarations. (Class members are not shown).
// Implicitly inherits from System.Object public class Movie { } // Explicitly inherit from a class public class Terrier : Dog { } // Implement one or more interfaces public class Dog : IBark, IFetch { } // Inherit and implement an interface public class BorderCollie : Dog, IHerd, IObsess { }