// Create a program that will define an object called Rectangle.

// The rectangle has 2 attributes, length and width.

// Define the methods of a rectangle, namely: computePerimeter 

// and computeArea.

​

using System;

​

public class Rectangle

{

    private int length;

    private int width;

​

    public Rectangle() {}       //default constructor

​

    public void setLength(int l)

    {

        this.length = l;

    }

    public int getLength() 

    {

        return length;

    }

}

​

public class HelloWorld

{

    public static void Main(string[] args)

    {

        Console.WriteLine ("Hello Mono World");

    }

}