//জাভা (Java) – Downcasting
class Animal {
  void printName(String name) {
    System.out.println(“The name of the animal is ” + name);
  }
}
class Dog extends Animal {
  void printBreed(String breed) {
    System.out.println(“The breed of the dog is ” + breed);
  }
}
public class DowncastingExample {
  public static void main(String[] args) {
    Animal a = new Animal();
    // This will cause a compile-time warning and a runtime exception
    // Dog d = (Dog) a;
    // d.printBreed(“Labrador”); // Error: java.lang.ClassCastException
    Animal b = new Dog();
    if (b instanceof Dog) {
      Dog e = (Dog) b;
      e.printBreed(“Poodle”);
    }
    a.printName(“Tommy”);
    b.printName(“Rex”);
  }
}

//জাভা (Java) – Output
The breed of the dog is Poodle
The name of the animal is Tommy
The name of the animal is Rex

//সি# (C#)
using System;
class Animal
{
    public void PrintName(string name)
    {
        Console.WriteLine(“The name of the animal is ” + name);
    }
}
class Dog : Animal
{
    public void PrintBreed(string breed)
    {
        Console.WriteLine(“The breed of the dog is ” + breed);
    }
}
public class DowncastingExample
{
    public static void Main(string[] args)
    {
        Animal a = new Animal();
        // This will cause a compile-time error
        // Dog d = (Dog) a;
        // d.PrintBreed(“Labrador”); // Error: Cannot implicitly convert type ‘Animal’ to ‘Dog’
        Animal b = new Dog();
        if (b is Dog)
        {
            Dog e = (Dog) b;
            e.PrintBreed(“Poodle”);
        }
        a.PrintName(“Tommy”);
        b.PrintName(“Rex”);
    }
}

//Output – আউটপুট
The breed of the dog is Poodle
The name of the animal is Tommy
The name of the animal is Rex