RectangleTest.cs

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

namespace FundemantalsProject
{
  public class RectangleTest
  {
    public void Test() {
      Rectangle r = new Rectangle();
      r.width = 3;
      r.height = 4;
      double a = r.GetArea();
      Console.WriteLine("Area : " + a);
    }
  }
}