sending email along with database values as attachment in c#

try

    {

      byte[] bytes;

      MailMessage email = new MailMessage();

      email.From = new MailAddress("<sourcr email address>");

      email.To.Add("<destination email address>");

      email.Subject = "Mail Testing";

      email.Body = "You are Successfully Created Profile......";

      string constr =         ConfigurationManager.ConnectionStrings["fishbowlConnectionString"].ConnectionString;

            using (SqlConnection con = new SqlConnection(constr))

            {

                using (SqlCommand cmd = new SqlCommand())

                {                  

                    cmd.CommandText = "SELECT UserName FROM Email";

                    cmd.Connection = con;

                    con.Open();

                    using (SqlDataReader sdr = cmd.ExecuteReader())

                    {                      

                        sdr.Read();

                        bytes =         Encoding.ASCII.GetBytes(sdr["UserName"].ToString());                       

                        MemoryStream pdf = new MemoryStream(bytes);

                        Attachment data = new Attachment(pdf, "example.txt", "text/plain");

                        email.Attachments.Add(data);

                    }

                    con.Close();

                }

            }

            SmtpClient smtp = new SmtpClient();

            smtp.UseDefaultCredentials = false;

            smtp.Credentials = new System.Net.NetworkCredential("<source email address>", "<source email password>");

            smtp.Port = 587;

            smtp.Host = "smtp.gmail.com";

            smtp.EnableSsl = true;

            smtp.Send(email);

        }

        catch (Exception Ex)

        {

            Console.WriteLine(Ex.ToString());

        }