Print a richtextbox in c#

using System;
using System.Drawing;
using System.Drawing.Printing;
using System.Windows.Forms;

public class PrintExampleForm : Form
{
    private RichTextBox richTextBox;
    private Button printButton;

    public PrintExampleForm()
    {
        // Initialize the form and controls
        this.richTextBox = new RichTextBox();
        this.printButton = new Button();

        // Set up the RichTextBox control
        this.richTextBox.Dock = DockStyle.Fill;

        // Set up the Print button
        this.printButton.Text = "Print";
        this.printButton.Click += PrintButton_Click;

        // Add controls to the form
        this.Controls.Add(this.richTextBox);
        this.Controls.Add(this.printButton);
    }

    private void PrintButton_Click(object sender, EventArgs e)
    {
        // Create a new PrintDocument
        PrintDocument pd = new PrintDocument();
        pd.PrintPage += Pd_PrintPage;

        // Create a new PrintDialog
        PrintDialog printDialog = new PrintDialog();
        printDialog.Document = pd;

        // Show the PrintDialog
        DialogResult result = printDialog.ShowDialog();

        if (result == DialogResult.OK)
        {
            // If the user clicks OK, start printing
            pd.Print();
        }
    }

    private void Pd_PrintPage(object sender, PrintPageEventArgs e)
    {
        // Set up the print content
        string text = this.richTextBox.Text;
        Font font = this.richTextBox.Font;
        Brush brush = new SolidBrush(this.richTextBox.ForeColor);

        // Calculate the area to print
        RectangleF rect = new RectangleF(e.MarginBounds.Left, e.MarginBounds.Top, e.MarginBounds.Width, e.MarginBounds.Height);

        // Draw the text on the printer graphics
        e.Graphics.DrawString(text, font, brush, rect);
    }

    public static void Main()
    {
        Application.Run(new PrintExampleForm());
    }
}