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#

# Problem Statement

When a method in a derived class overrides a `virtual` method in a base class, it is still possible to call the overridden method using the `base` keyword. 


> If you write `base.Method()`, it will call the method that was defined in the superclass.

> The `GetClassName()` method is already implemented in the base class.

You are given a partially completed code in the editor. Modify and override the method `GetClassName()` in the derived class code so that the code returns the following:

## Input
Derived Class Name

## Output
Base Class Name, Derived Class Name

## Sample Input

```C#
         Product beverage = new XProduct("Beverage");
```

## Sample Output
```C#
         "Product, Beverage"
```



Can you override a method in a derived class? A solution is placed in the solution section to help you, but we suggest you try to solve it on your own first.

Introduction to Object-Oriented Programming

Classes and Objects

Data Hiding

Inheritance

Polymorphism

Abstract Classes and Interfaces

Composition, Aggregation and Association

Challenge 1: Override a Method in the Derived Class

Problem Statement