Gain insights into OOP with C#. Delve into practical coding examples and exercises, exploring OOP concepts through a real-world vending machine project to understand and apply them effectively.

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Object-oriented programming (OOP) has been around for decades. As the original object-oriented language, C# is a mainstay in the world of computer programming.

All the concepts of object-oriented programming that C# developers love to have in their arsenal are explained in detail along with relevant coding examples and exercises in this course.

This course is unique in its nature as it follows a project-based learning approach. Throughout the course, a real-world example of vending machine is followed to help the learners develop a firm understanding of the stated OOP concepts.

The learners will not only be able to play around with the project,  they’ll also be able to see all the concepts in action in this project.

Learn Object-Oriented Programming in C#

// Base Class
class Product {

  // Private Data Members
  private string _className;
  
  public Product() { // Default Constructor
  	this._className = "Product";
  }

  // Getter Function
  public virtual string GetName() {
    return this._className;
  }
  
}

// Derived Class
class XProduct : Product { 
  
  private string _className;
  
  public XProduct(string className) { // Default Constructor
    this._className = className;
  }
  
  // Overriden Method
  public override string GetName() { 
    return base.GetName() + ", " +this._className;
  }
  
}

class Demo {
  
 public static void Main(string[] args) {
   
   Product beverage = new XProduct("Beverage");
   Console.WriteLine(beverage.GetName());
    
 }
}

// Base Class
class Shape {

  // Private Data Members
  private String name;
  
  public Shape() { // Default Constructor
  	name = "Shape";
  }

  // Getter Function
  public String getName() {
    return name;
  }
  
}

// Derived Class
class XShape extends Shape { 
  
  private String name;
  
  public XShape(String name) { // Default Constructor
    this.name = name;
  }
  
  // Overridden Method
  public String getName() { 
    // write your code here
    
    return super.getName() + ", " + this.name;
  }
  
}

## Explanation

* **Line 29:**  The `base` keyword is used to call the **Base Class** method `GetName()`. With the help of the `base` keyword, the method returns the base class name. Then we append the derived class name to it and return the string.

This review provides a detailed analysis to solve the 'Override a Method in the Derived Class' challenge.

Introduction to Object-Oriented Programming

Classes and Objects

Data Hiding

Inheritance

Polymorphism

Abstract Classes and Interfaces

Composition, Aggregation and Association

Solution Review: Override a Method in the Derived Class