Method overriding with virtual and override in C Sharp (C#) - Mini Project: Build & Apply

Method overriding with virtual and override

📖 Scenario: Imagine you are creating a simple program to show different types of animals making sounds. Each animal has a method to make a sound, but the exact sound depends on the animal type.

🎯 Goal: You will build a base class Animal with a virtual method MakeSound(). Then, you will create a derived class Dog that overrides MakeSound() to show a dog-specific sound. Finally, you will print the sounds from both classes.

📋 What You'll Learn

Create a base class Animal with a virtual method MakeSound() that prints "Some generic animal sound".

Create a derived class Dog that overrides the MakeSound() method to print "Bark!".

Create an instance of Animal and call MakeSound().

Create an instance of Dog and call MakeSound().

Print the outputs exactly as specified.

💡 Why This Matters

🌍 Real World

Method overriding is used in many programs to allow different objects to behave differently while sharing the same method name. For example, different animals making different sounds.

💼 Career

Understanding virtual and override keywords is essential for object-oriented programming jobs, especially when working with inheritance and polymorphism in C#.

1

Create the base class with a virtual method

Create a class called Animal with a public virtual method MakeSound() that prints exactly "Some generic animal sound".

C Sharp (C#)

// Your code here

Need a hint?

Use the virtual keyword to allow the method to be overridden later.

2

Create the derived class that overrides the method

Create a class called Dog that inherits from Animal. Override the MakeSound() method using the override keyword to print exactly "Bark!".

C Sharp (C#)

using System;

class Animal
{
    public virtual void MakeSound()
    {
        Console.WriteLine("Some generic animal sound");
    }
}

// Your code here

Need a hint?

Use class Dog : Animal to inherit and override to change the method.

3

Create instances and call the methods

Create an instance called animal of type Animal and call animal.MakeSound(). Then create an instance called dog of type Dog and call dog.MakeSound().

C Sharp (C#)

using System;

class Animal
{
    public virtual void MakeSound()
    {
        Console.WriteLine("Some generic animal sound");
    }
}

class Dog : Animal
{
    public override void MakeSound()
    {
        Console.WriteLine("Bark!");
    }
}

// Your code here

Need a hint?

Create objects and call the methods exactly as shown.

4

Print the output

Run the program and print the output of calling MakeSound() on both animal and dog. The output should be exactly two lines: first "Some generic animal sound", then "Bark!".

C Sharp (C#)

using System;

class Animal
{
    public virtual void MakeSound()
    {
        Console.WriteLine("Some generic animal sound");
    }
}

class Dog : Animal
{
    public override void MakeSound()
    {
        Console.WriteLine("Bark!");
    }
}

class Program
{
    static void Main()
    {
        Animal animal = new Animal();
        animal.MakeSound();

        Dog dog = new Dog();
        dog.MakeSound();
    }

    // Your code here
}

Need a hint?

Make sure the output matches exactly with no extra spaces or lines.