Class With Methods

namespace Class_With_Methods
{
    /// <summary>
    /// In addition to private fields, constructor, and public properties, a class may also defines methods.
    /// Methods state the functions an object of the class can perform.
    /// </summary>

    public partial class Form1 : Form
    {
        Random rand = new Random();
        public Form1()
        {
            InitializeComponent();
        }

        private void btnCreateBoxes_Click(object sender, EventArgs e)
        {
            //get a random length, width, height;
            double length = rand.Next(3, 7) + rand.NextDouble();
            double width = rand.Next(1, 4) + rand.NextDouble();
            double height = rand.Next(2, 6) + rand.NextDouble();

            //create
            Box box1 = new Box(length, width, height);
            //---------------------------------------------
            //get a random length, width, height;
            length = rand.Next(3, 7) + rand.NextDouble();
            width = rand.Next(1, 4) + rand.NextDouble();
            height = rand.Next(2, 6) + rand.NextDouble();

            //create
            Box box2 = new Box(length, width, height);

            //Save Box
            //Remark for Lab// List<Box> boxList

            //Display both boxes
            DisplayBox(box1);
            DisplayBox(box2);
        }
        //Define a method that display a Box object
        private void DisplayBox(Box box)
        {
            richTextBox1.AppendText("length: " + box.Length.ToString("f2") + "\n" +
                "Width: " + box.Width.ToString("f2") + "\n" + "Height: " + box.Height.ToString("f2") + "\n" +
                "Volume: " + box.Volume().ToString("f2") + "\n" + "Area: " + box.Area().ToString("f2") + "\n\n");
        }
    }
    //=========================================
    public class Box
    {
        private double _length;
        private double _width;
        private double _height;
        //constructor
        public Box(double length, double width, double height)
        {
            _length = length;
            _width = width;
            _height = height;
        }
        //properties
        public double Length
        { get { return _length; } }

        public double Width
        { get { return _width; } }

        public double Height
        { get { return _height; } }

        //Methods 
        public double Volume()
        {
            return _length * _width * _height;
        }

        public double Area()
        {
            return 2 * (_length * _width) + 2 * (_length * _height) + 2 * (_height * _width);
        }
    }
}
///Lab: 
///Define a class Cylinder
///define its private fields, constructor and properties
///define methods Volume and Area
///in Form1: Create a List of Cylinder
///Add button to create new cylinder and add to list
///Add label at the bottom corner to display the number of 
///cylinders added to the list
///Add button to display all the cylinders in the list