using System;
using System.Collections.Generic;
using System.Linq;
class Shape
{
public void Draw()
{
Console.WriteLine("Drawing a shape");
}
}
class Circle : Shape
{
public void DrawCircle()
{
Console.WriteLine("Drawing a circle");
}
}
class Square : Shape
{
public void DrawSquare()
{
Console.WriteLine("Drawing a square");
}
}
class Program
{
static void Main(string[] args)
{
Shape shape = new Circle();
// Shape shape = new Square();
// Upcasting: Creating a base class reference to a derived class object
// Downcasting: Converting the base class reference back to a derived class reference
Circle circle = (Circle)shape;
var x = (Square)shape;
// Checking if the downcast is successful
if (circle != null)
{
circle.DrawCircle();
}
else
{
Console.WriteLine("Downcast failed");
}
}
}
