BoxClass

namespace ClassBox
{
    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Text;
    using System.Threading.Tasks;

    public class Box
    {
        private double length;
        private double width;
        private double height;

        public Box(double length, double width, double height)
        {
            this.Length = length;
            this.Width = width;
            this.Height = height;
        }

        public double Length
        {
            get
            {
                return this.length;
            }

            set
            {
                ThrowExceptionIfSideIsNegative(value, nameof(this.Length));

                this.length = value;
            }
        }

        public double Width
        {
            get
            {
                return this.width;
            }

            set
            {
                ThrowExceptionIfSideIsNegative(value, nameof(this.Width));

                this.width = value;
            }
        }

        public double Height
        {
            get
            {
                return this.height;
            }

            set
            {
                ThrowExceptionIfSideIsNegative(value, nameof(this.Height));

                this.height = value;
            }
        }

        private void ThrowExceptionIfSideIsNegative(double side, string sideName)
        {
            if (side <= 0)
            {
                Console.WriteLine($"{sideName} cannot be zero or negative.");

                Environment.Exit(0);
            }
        }

        private double Multiply(double first, double second)
        {
            return (first * second) * 2;
        }

        public double LateralSurfaceArea()
        {
            return Multiply(length, height) + Multiply(width, height);
        }

        public double SurfaceArea()
        {
            return Multiply(length, width) + Multiply(length, height) + Multiply(width, height);
        }

        public double Volume()
        {
            return length * width * height;
        }
    }
}