using System;

​

namespace AreaCalculator

{

    class Program

    {

        public static double CalculateArea(double width = 1.0, double height = 1.0)

        {

            return width * height;

        }

​

        static void Main(string[] args)

        {

            double area1 = CalculateArea(width: 4.0, height: 5.0);

            Console.WriteLine($"The area of the rectangle with width 4.0 and height 5.0 is: {area1}");

​

            double area2 = CalculateArea(width: 3.0);

            Console.WriteLine($"The area of the rectangle with width 3.0 and default height is: {area2}");

​

            double area3 = CalculateArea(height: 6.0);

            Console.WriteLine($"The area of the rectangle with default width and height 6.0 is: {area3}");

        }

    }

}

​