Box

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

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            Box[] arr = new Box[5];
            for (int i = 0; i < arr.Length; i++) {
                Console.Write("Enter Length: ");
                double length = double.Parse(Console.ReadLine());
                Console.Write("Enter Width: ");
                double width = double.Parse(Console.ReadLine());
                Console.Write("Enter Height: ");
                double height = double.Parse(Console.ReadLine());

                arr[i] = new Box(length, width, height);
            }
            for (int i = 0; i < arr.Length; i++)
                Console.WriteLine(arr[i].ToString());
        }
    }
}

//Box.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ConsoleApplication1
{
    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 GetLength()
        {
            return this.length;
        }

        public double GetWidth()
        {
            return this.width;
        }

        public double GetHeight()
        {
            return this.height;
        }

        public void SetLength(double length)
        {
            this.length = length;
        }

        public void SetWidth(double width)
        {
            this.width = width;
        }

        public void SetHeight(double height)
        {
            this.height = height;
        }

        public double GetVolume()
        {
            return this.height * this.width * this.length;
        }

        public string ToString()
        {
            return "The box's length is " + this.length + ", width is " + this.width + ", height is " + this.height + ", volume is " + this.GetVolume();
        }
    }
}