Learn about object-oriented programming in C# with a project-based learning approach.

Become an ASP.NET Core Developer

In this module, we’ll go through the concepts of object-oriented programming that C# developers have in their arsenal are explained in detail, along with relevant coding examples and exercises.
 
This module is unique in its nature as it follows a project-based learning approach. Throughout the module, we’ll discuss a real-world example of vending machine to help us develop a firm understanding of the stated OOP concepts.

Object-oriented Programming in C#

## Problem Statement

We have already implemented a `Book` class which has an abstract method, `GetDetails()`, a parameterized constructor, and three private fields having their respective properties with `get` accessors defined: 

- `_name` with the property, `Name`
- `_author` with the property, `Author`
- `_price` with the property, `Price`


Write a `MyBook` class that inherits from the `Book` class and has a parameterized constructor taking these parameters:
- **string title**
- **string author**
- **string price**

Implement the `Book` class' `getdetails()` method in the `MyBook` class so that it returns the `MyBook` details.



### Input
``` c#
    Call to MyBook constructor passing name, author, and price.
    Call to `GetDetails()` method to return the details of a book.
```
### Output
    Returns the details of the book.


### Sample Input

```c#
Book myBook = new MyBook("Harry Potter", "J.k. Rowling", "100");
```

### Sample Output

```c#
"Harry Potter, J.k. Rowling, 100"
```



# Problem Statement

We have already implemented a `Book` class which has an abstract method, `GetDetails()`, a parameterized constructor, and three private fields having their respective properties with `get` accessors defined: 

- `_name` with the property, `Name`
- `_author` with the property, `Author`
- `_price` with the property, `Price`


Write a `MyBook` class that inherits from the `Book` class and has a parameterized constructor taking these parameters:
- **string title**
- **string author**
- **string price**

Implement the `Book` class' `getdetails()` method in the `MyBook` class so that it returns the `MyBook` details.



## Input
``` c#
    Call to MyBook constructor passing name, author, and price.
    Call to `GetDetails()` method to return the details of a book.
```
## Output
    Returns the details of the book.


## Sample Input

```c#
Book myBook = new MyBook("Harry Potter", "J.k. Rowling", "100");
```

## Sample Output

```c#
"Harry Potter, J.k. Rowling, 100"
```



Can you implement an abstract method of a base class? A solution is placed in the solution section to help you, but we would suggest that you try to solve it on your own first.

Introduction to Object-Oriented Programming in C#

Classes and Objects

Data Hiding

Inheritance

Polymorphism

Abstract Classes and Interfaces

Composition, Aggregation and Association

Conclusion

Challenge 1: Implement an Abstract Method in a Base Class

Problem Statement