C# OOP(Object Oriented Programming) Concepts

Object Oriented Programming Concepts

The Key Concepts of Object Oriented Programming are :

•  Abstraction
•  Encapsulation
•  Inheritance
•  Polymorphism

Concept & Feature : 

• Concept : Abstraction
  Feature : Natural mapping and association of data and programs or sub-programs   which operate on that data.
• Concept : Encapsulation
  Feature : Hide or Unhide part of the data or Functionality from some components
• Concept : Inheritance
  Feature : Extend the functionality for new requirements without disturbing the existing implementation.

==> Difference between Object oriented & Object Based Languages

Object oriented Languages : All programming languages that support abstraction, encapsulation, inheritance and polymorphism are known as Object-Oriented.

Object Based Languages : All programming Languages that support abstraction and encapsulation but do not support inheritance, therefore cannot support polymorphism are known as object based languages. VB and Ada are are Object-Based languages.

What is an Object ?

• An object is an entity which has a well defined structure and behavior.
• An Object Possesses certain Characteristics are:
  ==> State
  ==> Behavior
  ==> Identity
  ==> Responsibility

Abstraction :

•  Abstraction is the Process of identifying the key aspects of an entity and ignoring the rest.
• Only those aspects are selected that are important to the current problem scenario.

Encapsulation :

• Encapsulation is a mechanism used to hide the data, internal structure, and implementation details of an object.
• All interaction with the object is through a public interface of operations.
• The user knows only about the interface, any changes to the implementation does not affect the user.

Inheritance :

• The Process of acquiring the Properties of Base class (Parent Class) to the Sub Class (Child Class) is known as Inheritance.
•  Inheritance is  " is - a " a kind of hierarchy.

Polymorphism : 

• The ability of different types of related objects to respond to the same message in their own ways is called polymorphism. 
• Polymorphism helps us to design extensible software, as new objects can be added to the design without rewriting existing procedures.
• Polymorphism is the ability to take more than one form. This means that one command may invoke different implementation for different related objects.