using System;
public class Program
{
public static void Main()
Console.WriteLine("Hello World");
}
class Rectangle{
private double length;
private double width;
public Rectangle(double l, double w){
length = l;
width = w;
public double GetArea(){
return length * width;
public void FunFact(){
Console.WriteLine("Did you know all squares are rectangles, but not all rectangles are squares.");
