C# Delegates Covariance Demo

using System;

namespace Delegates_Covariance
{
    class Program
    {
        public delegate Shape GetShape();

        public static Rectangle GetRectangle()
        {
            return new Rectangle();
        }
        public static Circle GetCircle()
        {
            return new Circle();
        }
        static void Main(string[] args)
        {
            GetShape getCircleMethod = GetCircle;
            GetShape getRectangleMethod = GetRectangle;
            Console.WriteLine(getCircleMethod());
            Console.WriteLine(getRectangleMethod.Invoke());

        }
    }

    public class Shape { }
    public class Rectangle : Shape
    {
        public override string ToString()
        {
            return "I'm Circle";
        }
    }
    public class Circle : Shape
    {
        public override string ToString()
        {
            return "I'm Rectangle";
        }
    }
}