This keyword behavior in C Sharp (C#) - Mini Project: Build & Apply

This keyword behavior

📖 Scenario: Imagine you are creating a simple program to understand how the this keyword works in C#. This keyword helps you refer to the current object inside a class.

🎯 Goal: You will build a class with a field and a method that uses the this keyword to show how it refers to the current object.

📋 What You'll Learn

Create a class called Car with a field color of type string.

Add a constructor that takes a string parameter called color and assigns it to the field using the this keyword.

Add a method called ShowColor that prints the car's color using the this keyword.

Create an object of the Car class with the color "red" and call the ShowColor method.

💡 Why This Matters

🌍 Real World

Understanding the <code>this</code> keyword is important when working with classes and objects in C#. It helps you clearly refer to the current object's data, especially when names overlap.

💼 Career

Many programming jobs require working with object-oriented code. Knowing how <code>this</code> works helps you write clear and bug-free code when creating and managing objects.

1

Create the Car class with a color field

Create a class called Car with a public field color of type string.

C Sharp (C#)

public class Car
{
    // Your code here
}

Need a hint?

Use public string color; inside the class to create the field.

2

Add a constructor using the this keyword

Add a constructor to the Car class that takes a string parameter called color and assigns it to the field color using the this keyword.

C Sharp (C#)

public class Car
{
    public string color;

    // Your code here
}

Need a hint?

Use this.color = color; inside the constructor to assign the parameter to the field.

3

Add a method to show the car color using this

Add a public method called ShowColor inside the Car class that prints the car's color using this.color with Console.WriteLine.

C Sharp (C#)

public class Car
{
    public string color;

    public Car(string color)
    {
        this.color = color;
    }

    // Your code here
}

Need a hint?

Use Console.WriteLine with this.color inside the method.

4

Create a Car object and call ShowColor

In the Main method, create a Car object called myCar with the color "red" and call the ShowColor method on it.

C Sharp (C#)

public class Car
{
    public string color;

    public Car(string color)
    {
        this.color = color;
    }

    public void ShowColor()
    {
        Console.WriteLine($"The car color is {this.color}");
    }
}

class Program
{
    static void Main()
    {
        // Create the Car object and call ShowColor
        // Your code here
    }
}

Need a hint?

Use Car myCar = new Car("red"); and then myCar.ShowColor(); inside Main.