รบกวนพี่ๆ ช่วยให้คำแนะนำหน่อยคับ เรื่องการ stop word ด้วยครับ ขอบคุณครับ

 string strConn = "data source=.;initial catalog=ITE499;Max Pool Size=500;integrated security=SSPI";
                
                    SqlConnection Conn = new SqlConnection(strConn);

                    if (Conn.State == ConnectionState.Closed)
                    {
                        Conn.Open();
                    }
                    SqlCommand Cmd = Conn.CreateCommand();
                    Cmd.CommandType = CommandType.Text;


dataGridView1.Visible = false; 
            textBox1.Visible = true;
            for ( int allwordid = 1 ; allwordid < 671 ; allwordid++)
            {
                
              MessageBox.Show(Convert.ToString(allwordid));

             string strsql = "select stop_word from stopword where stop_id=" + allwordid;
            Cmd.CommandText = strsql;
            SqlDataReader r = Cmd.ExecuteReader();

            while (r.Read() == true)
            {
                string stop = r["stop_word"].ToString();
              //  MessageBox.Show(stop);

                    int result = 0;

                    string deletestrsql = "DELETE FROM term1 WHERE term_word='" + stop + "'";


                    Cmd.CommandText = deletestrsql;

                    result = Cmd.ExecuteNonQuery();

                    if (result != -1)
                    {
                        //   MessageBox.Show("Complete");
                    }

                    Conn.Close();

                }

            }
              //  MessageBox.Show(strsql);

                if (allwordid == 670)
                {
                    MessageBox.Show("ลบแล้ว");
                }
            }