اضافه کردن CheckBox به دیتاگرید

سلام
یه دونه باتن و یه دونه دیتا گرید قزار بدین و کد های زیر رو توش بنویسین

using System;using System.Windows.Forms;





namespace WindowsFormsApplication148

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }





        private void button1_Click(object sender, EventArgs e)

        {

            dataGridView1.ColumnCount = 3;

            dataGridView1.Columns[0].Name = "Product ID";

            dataGridView1.Columns[1].Name = "Product Name";

            dataGridView1.Columns[2].Name = "Product Price";





            string[] row = new string[] { "1", "Product 1", "1000" };

            dataGridView1.Rows.Add(row);

            row = new string[] { "2", "Product 2", "2000" };

            dataGridView1.Rows.Add(row);

            row = new string[] { "3", "Product 3", "3000" };

            dataGridView1.Rows.Add(row);

            row = new string[] { "4", "Product 4", "4000" };

            dataGridView1.Rows.Add(row);





            DataGridViewCheckBoxColumn chk = new DataGridViewCheckBoxColumn();

            dataGridView1.Columns.Add(chk);

            chk.HeaderText = "Check Data";

            chk.Name = "chk";

            dataGridView1.Rows[2].Cells[3].Value = true;

        }





    }

}

با سپاس Spaceman