using System;

​

public class Program

{

    public static void Main()

    {

        Rectangle[] objects = new Rectangle[2];

        objects[0] = new Rectangle() {Width = 10, Height =20};

        objects[1] = new Rectangle() {Width = 5, Height =5};

        Console.WriteLine("Area of objects: {0}", Area(objects));

    }

    public static double Area(Rectangle[] shapes)

    {

        double area = 0;

        foreach (var shape in shapes)

        {

            Rectangle rectangle = (Rectangle) shape;

            area += rectangle.Width*rectangle.Height;

        }

        return area;

    }

}

​

public class Rectangle

{

    public double Width { get; set; }

    public double Height { get; set; }

}

​

​

​