CONSTRUCTOR

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Polymorphism
{
    class Window
    {
        protected int top, left, bottom, right;
        public Window(int top, int left, int bottom, int right)
        {
            this.top = top;
            this.left = left;
            this.bottom = bottom;
            this.right = right;
        }
        public Window() { }
        public virtual void DrawWindow()
        {
            Console.WriteLine("Window is drawn at (({0}, {1}), ({2}, {3}))", this.top, this.left, this.bottom, this.right);
        }
    }

    class Dialog : Window
    {
        public Dialog(int top, int left, int bottom, int right)
        {

        }
        public new void DrawWindow()
        {
            Console.WriteLine("Dialog is drawn at (({0}, {1}), ({2}, {3}))", this.top, this.left, this.bottom, this.right);
        }
    }
    class Program
    {
        static void Main(string[] args)
        {
            Window d1 = new Dialog(1, 2, 3, 4);
            Dialog d2 = new Dialog(5, 6, 7, 8);
            d1.DrawWindow();
            d2.DrawWindow();
        }
    }
}