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#

# What Is the `base` Keyword?
As you already know, the `this` keyword in C# is used to refer to the *instance* of the current class.

In a similar fashion, the `base` keyword in C# is used to refer to the *base class* members from inside the immediate *derived class*. The use of `base` comes into play when we implement inheritance.

# Use Cases of the `base` Keyword

The base keyword is used in *three* major contexts:

## Accessing Base Class Fields
The `base` keyword can be used to access any *non-private* fields of the base class directly from the derived class. The `base` keyword followed by the dot `.` operator is used in the derived class to access a field of the base class.

Consider a field named `price` defined inside a `Product` class to keep track of the *price* of a product. Another class named as `Beverage` inherits from this `Product` class. We declare a field inside the `Beverage` class with the same name, `price`, but different value. Now if we want to access the `price` field of the *base class* from the *derived class,* we will then have to use the `base` keyword.

Let's understand this using a bit of code.

In this lesson, you'll get to know the uses of the 'base' keyword in C#.

Introduction to Object-Oriented Programming

Classes and Objects

Data Hiding

Inheritance

Polymorphism

Abstract Classes and Interfaces

Composition, Aggregation and Association

Base Keyword

What Is the `base` Keyword?

Use Cases of the `base` Keyword

Accessing Base Class Fields

Base Keyword

What Is the base Keyword?

Use Cases of the base Keyword

Accessing Base Class Fields

What Is the `base` Keyword?

Use Cases of the `base` Keyword