C# Method Overriding Example

when you have a derive class (child class) and base class (parent classs). You can implement the base class (parent class) methods in derived class (child class). In base class we use virtual keyword for defining the method. We use override keyword for implementing the base class method in derive class. Overriding is feature of Object Oriented Programming .

• Method Overriding:

  

  when you have a derive class (child class) and base class (parent classs). You can implement the base class (parent class) methods in derived class (child class). In base class we use virtual keyword for defining the method.

  We use override keyword for implementing the base class method in derive class. It is feature of Object Oriented Programming.

  In above diagram we have Fruit class Which is parent class of two child classes like Mango and WaterMelon. The Fruit class has one virtual method Taste() that is overridden in two derived classes Mango and WaterMleon.

  Note: A method in derived class overrides the method in base class if the method in derived class has the same name, same return type and same parameters as that of the base class.

  Example

  Here, bleow code is an example of method overriding, We have Fruit class that have Taste virtual method.

  We have inherited this Fruit class with WaterMelon subclass class. So in WaterMelon subclass Class Taste method is overriding. We have inherited this Fruit class with Mango subclass class. So in Mango subclass Class Taste method is overriding.

  Copy Code

  // Base class (parent class)

  public class Fruit

  {

  public virtual void Taste()

  {

  Console.WriteLine("Fruits have unique taste.");

  }

  }

  // Derive class (child class)

  public class WaterMelon: Fruit

  {

  public override void Taste()

  {

  Console.WriteLine("WaterMelon has mixture of sweet, sour and bitter taste.");

  }

  }

  // Derive class (child class)

  public class Mango: Fruit

  {

  public override void Taste()

  {

  Console.WriteLine("Mango has sweet and creamy taste.");

  }

  }

  // Base class (parent class)

  public class Fruit

  {

  public virtual void Taste()

  {

  Console.WriteLine("Fruits have unique taste.");

  }

  }

  // Derive class (child class)

  public class WaterMelon: Fruit

  {

  public override void Taste()

  {

  Console.WriteLine("WaterMelon has mixture of sweet, sour and bitter taste.");

  }

  }

  // Derive class (child class)

  public class Mango: Fruit

  {

  public override void Taste()

  {

  Console.WriteLine("Mango has sweet and creamy taste.");

  }

  }

  Here's a basic breakdown of how Fruit class is working in below exmaple:
  Taste()	Taste() is an vistual method of Fruit base class.

  Here's a basic breakdown of how WaterMelon subclass is working in below exmaple:
  Taste()	Taste() is an override method of Fruit base class but has characteristics in WaterMelon subclass also.

  Here's a basic breakdown of how Mango subclass is working in below exmaple:
  Taste()	Taste() is an override method of Fruit base class but has characteristics in Mango subclass also.

• Method Overriding: Example

  Here, bleow code is an example of method overriding, We have Fruit class that have Taste virtual method.

  We have inherited this Fruit class with WaterMelon subclass class. So in WaterMelon subclass Class Taste method is overriding. We have inherited this Fruit class also with Mango subclass class. So in Mango subclass Class Taste method is overriding.

  Copy Code

  using System;

  class CSharpProgram

  {

  static void Main(string[] arge)

  {

  Fruit objfruit;

  objfruit = new Fruit();

  objfruit.Taste();

  objfruit = new WaterMelon();

  objfruit.Taste();

  objfruit = new Mango();

  objfruit.Taste();

  }

  }

  // Base class (parent class)

  public class Fruit

  {

  public virtual void Taste()

  {

  Console.WriteLine("Fruits have unique taste.");

  }

  }

  // Derive class (child class)

  public class WaterMelon: Fruit

  {

  public override void Taste()

  {

  Console.WriteLine("WaterMelon has mixture of sweet, sour and bitter taste.");

  }

  }

  // Derive class (child class)

  public class Mango: Fruit

  {

  public override void Taste()

  {

  Console.WriteLine("Mango has sweet and creamy taste.");

  }

  }

  using System;

  class CSharpProgram

  {

  static void Main(string[] arge)

  {

  Fruit objfruit;

  objfruit = new Fruit();

  objfruit.Taste();

  objfruit = new WaterMelon();

  objfruit.Taste();

  objfruit = new Mango();

  objfruit.Taste();

  }

  }

  // Base class (parent class)

  public class Fruit

  {

  public virtual void Taste()

  {

  Console.WriteLine("Fruits have unique taste.");

  }

  }

  // Derive class (child class)

  public class WaterMelon: Fruit

  {

  public override void Taste()

  {

  Console.WriteLine("WaterMelon has mixture of sweet, sour and bitter taste.");

  }

  }

  // Derive class (child class)

  public class Mango: Fruit

  {

  public override void Taste()

  {

  Console.WriteLine("Mango has sweet and creamy taste.");

  }

  }

  
  
  

  Output

  Fruits have unique taste.

  WaterMelon has mixture of sweet, sour and bitter taste.

  Mango has sweet and creamy taste.

Summary

In method Overriding you can implement the base class behavior in derived classs. This flexibility and polymorphism make it a powerful feature for designing object-oriented programs in C#.