using System;

using System.Collections.Generic;

namespace DisplayShapeInfo

{

​

    public interface IShape

    {

        int SideCount { get; }

        int CalculatePerimeter();

    }

​

    public class Rectangle : IShape

    {

        private int[] _dimensions;

​

        public Rectangle(int[] dimensions)

        {

            _dimensions = dimensions;

        }

​

        public int CalculatePerimeter() => 2 * (_dimensions[0] + _dimensions[1]);

        public int SideCount => _dimensions.Length;

    }

​

    public class Square : IShape

    {

        private int[] _dimensions;

        public Square(int[] dimensions)

        {

            _dimensions = dimensions;

        }

​

        public int CalculatePerimeter() => 4 * _dimensions[0];

        public int SideCount => _dimensions.Length;

    }

​

    public enum ShapeType

    {

        Rectangle,

        Square,

        Triangle

    }

​

    class Program

    {

        static void Main(string[] args)

        {

            try

            {

                List<IShape> shapes = new List<IShape>()

                    {

                        ShapeFactory.CreateShape(ShapeType.Rectangle, new[] {4, 7}),

                        ShapeFactory.CreateShape(ShapeType.Square, new[] {3}),

                        ShapeFactory.CreateShape(ShapeType.Triangle, new[] {5, 2, 6})

                    };

​

                foreach (var shape in shapes)

                {

                    Console.WriteLine($"Perimeter for this {shape.GetType().Name} = {shape.CalculatePerimeter()}");

                }

​

                //foreach (var shape in shapes)

                //{

                //    Console.WriteLine(shape.Describe());

                //}

​

                /*Output:

                 * 

                    Perimeter for this Rectangle = 22

                    Perimeter for this Square = 12

                    Perimeter for this Triangle = 13

                    I am a Rectangle with 2 side(s). Perimeter = 22

                    I am a Square with 1 side(s). Perimeter = 12

                    I am a Triangle with 3 side(s). Perimeter = 13

                */

            }

            catch (ArgumentException ex)

            {

                Console.WriteLine($"Error: {ex.Message}");

            }

        }

    }

}

​

​