C sharp - imprimir formulario en c#

Code Snippet

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Text;

using System.Windows.Forms;

using System.Drawing.Printing;

namespace WindowsApplication4

{

    public partial class Form1 : Form

    {

        private Button botonImprimir = new Button();

        private PrintDocument printDocument1 = new PrintDocument();

        public Form1()

        {

            botonImprimir.Text = "Imprimir Formulario";

            botonImprimir.Click += new EventHandler(printButton_Click);

            printDocument1.PrintPage += new PrintPageEventHandler(printDocument1_PrintPage);

            this.Controls.Add(botonImprimir);

        }

        void printButton_Click(object sender, EventArgs e)

        {

            CapturarPantalla();

            printDocument1.Print();

        }

        Bitmap imagen;

        private void CapturarPantalla()

        {

            Graphics g = this.CreateGraphics();

            Size s = this.Size;

            imagen = new Bitmap(s.Width, s.Height, g);

            Graphics g2 = Graphics.FromImage(imagen);

            g2.CopyFromScreen(this.Location.X, this.Location.Y, 0, 0, s);

        }

        private void printDocument1_PrintPage(System.Object sender,

               System.Drawing.Printing.PrintPageEventArgs e)

        {

            e.Graphics.DrawImage(imagen, 0, 0);

        }

    }

}