Abstraction involves identifying the critical behaviors of an object and hiding irrelevant details. It focuses on the essential qualities rather than complex implementation. For example, a laptop user needs only to know how to operate it without understanding how each component like the screen or battery works internally. Abstract classes allow defining common behaviors for derived classes to implement. The example shows two university classes GBTU and MTU inheriting from an abstract university class and overriding its abstract fee methods to output school-specific tuition costs.

1. C# Tutorial
Part 23:Abstraction
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2. • OOPs supports no of concepts one of the is
• Abstaction:
• Hiding the unwanted data. we can gathered the essential
characteristics. we can gathered classes, properties,
methods & data members & member functions
• class emp
• {
• int sal,bonus,ta,ts;
• public void tsal()
• { }

3. • Abstraction is a process that involves identifying the critical behavior of an
object and eliminating irrelevant and complex denials. Abstraction is a process
of identifying the relevant qualities and behaviors an object should possess.
• Example- A Laptop consists of many things such as processor, motherboard,
RAM, keyboard, LCD screen, wireless antenna, web camera, USB ports,
battery, speakers etc. To use it, you don't need to know how internally LCD
screens, keyboard, web camera, battery, wireless antenna,
speaker’s works. You just need to know how to operate the laptop by
switching it on.
• Note- When derived class inherited with abstract class; derived class must be
override abstract class methods.
• MTU MBA Fee 800000/-

4. • Example of Abstraction: -
• using System;
• using System.Collections.Generic;
• using System.Linq;
• namespace abstarction
• { public abstract class university
• { public abstract void BTech();
• public abstract void MBA(); }
• public class GBTU : university
• { public override void BTech()
• { Console.WriteLine("GBTU BTech Fee 50000/-"); }
• public override void MBA()
• { Console.WriteLine("GBTU MBA Fee 100000/-"); } }
• public class MTU : university
• { public override void BTech()
• { Console.WriteLine("MTU BTech Fee 40000/-"); }
• public override void MBA()
• { Console.WriteLine("MTU MBA Fee 800000/-"); } }
• class Program
• { static void Main(string[] args) {
• GBTU g = new GBTU();
• g.BTech();
• g.MBA();
• MTU m = new MTU();
• m.BTech();
• m.MBA();
• Console.ReadLine(); } }}
• Output-
• GBTU BTech Fee 50000/-
• GBTU MBA Fee 100000/-
• MTU BTech Fee 40000/-

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