i need documentation this code  using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Linq;using System.Text;using System.Threading.Tasks;using System.Windows.Forms; namespace WindowsFormsApp3{    public partial class Form1 : Form    {        public Form1()        {            InitializeComponent();        }         private void button1_Click(object sender, EventArgs e)        {            // Get the dimensions of the PictureBox            int width = pictureBox1.Width;            int height = pictureBox1.Height;             // Create a new Bitmap object with the same dimensions as the PictureBox            Bitmap bmp = new Bitmap(width, height);             // Create a Graphics object from the Bitmap to draw on it            using (Graphics g = Graphics.FromImage(bmp))            {                // Clear the Bitmap to white background                g.Clear(Color.White);                 // Create a Pen to draw the sine wave, black color and 2 pixels wide                Pen pen = new Pen(Color.Black, 2);                 // Scale factor for the sine wave amplitude                int scale = 20;                 // Step for the x-values, calculated to fit several cycles in the PictureBox                double step = (Math.PI * 2 / width) * 4;                 // Iterate through each x-coordinate in the width of the PictureBox                for (int x = 0; x < width; x++)                {                    // Calculate the corresponding y-coordinate using the sine function                    int y = (int)(height / 2.0 + scale * Math.Sin(x * step));                     // Set the pixel at (x, y) to the color of the pen                    bmp.SetPixel(x, y, pen.Color);                }            }             // Set the Bitmap as the image of the PictureBox to display it            pictureBox1.Image = bmp;        }         private void button2_Click(object sender, EventArgs e)        {            // Clear the PictureBox by setting its Image property to null            pictureBox1.Image = null;        }    }    }