Method overriding in C# Example

 Method overriding in C# Example

Method overriding in C# allows a derived class to provide a specific implementation of a method that is already defined in its base class. To override a method in C#, you use the `override` keyword. Here's an example demonstrating method overriding in C#:

Let's consider a base class `Shape` with a method `CalculateArea()`:

```csharp

using System;

class Shape

{

    public virtual void CalculateArea()

    {

        Console.WriteLine("Calculating area in the base class (Shape).");

    }

}

```

In the above code, the `CalculateArea()` method is marked as `virtual`, indicating that it can be overridden by derived classes.

Now, let's create a derived class `Circle` that overrides the `CalculateArea()` method:

```csharp

class Circle : Shape

{

    private double radius;

    public Circle(double radius)

    {

        this.radius = radius;

    }

    // Method overriding

    public override void CalculateArea()

    {

        double area = Math.PI * radius * radius;

        Console.WriteLine($"Calculating area of the circle: {area}");

    }

}

```

In the `Circle` class, we use the `override` keyword to indicate that we are providing a specific implementation of the `CalculateArea()` method defined in the base class `Shape`. We calculate the area of the circle in the overridden method.

Now, you can create objects of the `Circle` class and call the `CalculateArea()` method. The overridden method in the `Circle` class will be executed:

```csharp

class Program

{

    static void Main(string[] args)

    {

        Shape shape = new Circle(5.0); // Creating a Circle object as a Shape

        shape.CalculateArea(); // Calls the overridden method in Circle class

        Console.ReadKey();

    }

}

```

In this example, even though the `shape` variable is of type `Shape`, it points to an instance of `Circle`. When `CalculateArea()` is called, it executes the overridden method in the `Circle` class, demonstrating method overriding in C#.