Object Oriented Programming using C#

Object Oriented Programming using C#

Inheritance and Method Overriding

Each subclass can have its own constructor for specialised initialization but it must often invoke the behaviour of the base

constructor. It does this using the keyword base.

class MySubClass : MySuperClass

{

public MySubClass (sub-parameters) : base(super-parameters)

{

// other initialization

}

Usually some of the parameters passed to MySubClass will be initializer values for superclass instance variables, and these

will simply be passed on to the superclass constructor as parameters. In other words super-parameters will be some (or

all) of sub-parameters.

Shown below are two constructors, one for the Publication class and one for Book. The book constructor requires four

parameters three of which are immediately passed on to the base constructor to initialize its instance variables.

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