List Data inside

public List<LmsDisposalDetail> GetDisposalDetailNSisa(int disposal_id)
        {
            System.Text.StringBuilder sb1 = new System.Text.StringBuilder();
            string query = (sb1.Append(GET_DISPOSAL_DETAIL_N_SISA).Append("  WHERE DD.DISPOSAL_ID ='" + disposal_id + "'")).ToString();

            DataTable dtbl = new DataTable();
            List<LmsDisposalDetail> dtDis = new List<LmsDisposalDetail>();

            dtbl = RISCF.getOracleDT(query);

            for (int i=0; i<dtbl.Rows.Count; i++)
            {
                string d2 = System.Convert.ToString(dtbl.Rows[i][2]);               //NAMA DETAIL
                string d8 = System.Convert.ToString(dtbl.Rows[i][8]);               //KATEGORI_SISA_LAIN

                dtDis.Add(new LmsDisposalDetail
                {
                    NAMA_BAHAN = d2,
                    STRING_KATEGORI_SISA_LAIN = d8,

                });

            }
            return dtDis;
        }