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#

class VendingMachine {

  // Private Fields
  private string _count;
  private string _capacity;
  private string _moneyCollected;

  // Default Constructor
  public VendingMachine() {

    this._count = "";
    this._capacity = "";
    this._moneyCollected = "";
  }

  // Parameterized Constructor 1
  public VendingMachine(string count, string capacity) {

    this._count = count;
    this._capacity = capacity;
  }

  // Parameterized Constructor 2
  public VendingMachine(string count, string capacity, string money)
  : this(count, capacity)
  {
    this._moneyCollected = money;
  }
  
  // Method to return vending machine details
  public string GetDetails() {
    
   return this._count + ", " + this._capacity + ", " + this._moneyCollected;
  }
  
}

class Demo {

  public static void Main(string[] args) {
    VendingMachine vendy = new VendingMachine("Count: 45", "Capacity: 50", "Money Collected: 440$");
    Console.WriteLine(vendy.GetDetails());
  }

}

// Car class
class Car {

  // Private Fields
  private String carName;
  private String carModel;
  private String carCapacity;

  // Default Constructor
  public Car() {

    this.carName = "";
    this.carModel = "";
    this.carCapacity = "";
  }

  // Parameterized Constructor 1
  public Car(String name, String model) {

    this.carName = name;
    this.carModel = model;
  }

  // Parameterized Constructor 2
  public Car(String name, String model, String capacity) {
  
    this(name, model); // calling parameterized Constructor
    
    this.carCapacity = capacity; // Assigning capacity
    
  }
  
  // Method to return car details
  public String getDetails() {
    
   return this.carName + ", " + this.carModel + ", " + this.carCapacity;
  }
}




## Explanation

The solution is pretty straightforward.
* **Line 25:** Parameterized constructor with two parameters is called using `this()`.
* **Line 27:** Third parameter is assigned to the respective field inside the constructor.

This review provides insight to the solution of the 'Calling a Constructor from a Constructor' challenge.

Introduction to Object-Oriented Programming

Classes and Objects

Data Hiding

Inheritance

Polymorphism

Abstract Classes and Interfaces

Composition, Aggregation and Association

Solution Review: Calling a Constructor from a Constructor