OOP (Object Oriented Programming)

·       .NET provides all languages with inheritance and constructors features

·       Virtual Object Model

·       Whether to smarten up non-object oriented languages or dump down OO languages

FEATURES OF OOP

There are four main features in oop.They are:

·       Inheritance

·       Polymorphism

·       Encapsulation

·       Abstraction

Inheritance

Inheritance is a relationship among classes, where  in one class shares the structure or behaviour defined in another class. This is called Single Inheritance. If a class shares the structure or behaviour from multiple classes, then it is called Multiple Inheritance. Inheritance defines “is-a” hierarchy among classes in which one subclass inherits from one or more generalised superclasses.

Polymorphism

Polymorphism literally means taking more than one form. Polymorphism is a characteristic of being able to assign a different behavior or value in a subclass, to something that was declared in a parent class.

Encapsulation

Encapsulation is the process of compartmentalising the elements of an abtraction that defines the structure and behaviour. Encapsulation helps to separate the contractual interface of an abstraction and implementation.

Abstraction

Abstraction defines the essential characteristics of an object that distinguish it from all other kinds of objects. Abstraction provides crisply-defined conceptual boundaries relative to the perspective of the viewer. Its the process of focussing on the essential characteristics of an object. Abstraction is one of the fundamental elements of the object model.