Inheritance and polymorphism

Inheritance allows a class to derive from a base class, inheriting fields, properties, and methods. Use virtual in the base class and override in the subclass to redefine behavior.

class SkyObject {
    public virtual void Describe() {
        Console.WriteLine("Object in sky");
    }
}

class Star : SkyObject {
    public override void Describe() {
        Console.WriteLine("Bright star");
    }
}

How it reads

• class Star : SkyObject indicates that Star inherits from SkyObject
• virtual void Describe() allows subclasses to redefine this method
• override void Describe() redefines the method in the subclass

Cloud tip: C# only supports single inheritance for classes. A subclass can only inherit from one direct base class.