oops concept in c#

Abstraction in object oriented programming

It is a process for showing necessary details and hiding implementation details from the user called abstraction .

• it can be used to make flexible ,maintainable and secure application

• with the help of abstraction we can create a flexible application, flexible means in the future suppose we have to make some changes in our application then we don't need to change overall application .

• in terms of security we hide the implementation details therefor our application is more secure than the other application by using abstraction

How we can implement abstraction

1. We implement abstraction using Abstract class or interfaces

2. by using this terms we can resolve design level issue

• Abstract class = it contain abstract methods and non-abstract methods , the method which doesn't have body or implementation is called abstract method

  there should be at least one abstract method in abstract class

• interfaces \= It contains only all abstract methods .