Add button in DataGridView in windows c#.net

  {
           dataGridView1.ColumnCount = 2;
            dataGridView1.Columns[0].Name = "EID";
            dataGridView1.Columns[1].Name = "NAME";
            for (int i = 0; i < dt.Rows.Count; i++)
            {
                string[] r = new string[] { dt.Rows[i].ItemArray[0].ToString(),dt.Rows[i].ItemArray[1].ToString()
};
                dataGridView1.Rows.Add(r);
            }
            DataGridViewButtonColumn dgb = new DataGridViewButtonColumn();
            dgb.HeaderText = "Press Me";
            dgb.Text = "Save";
            dgb.UseColumnTextForButtonValue = true;
            dataGridView1.Columns.Add(dgb);
        }
     

        private void dataGridView1_CellClick(object sender, DataGridViewCellEventArgs e)
        {
            if(e.ColumnIndex==2)
            MessageBox.Show(dataGridView1.CurrentRow.Cells[1].Value.ToString());
        }