private DataTable load_data_to_loai_hd() { US_DM_LOAI_HOP_DONG v_us = new US_DM_LOAI_HOP_DONG(); DS_DM_LOAI_HOP_DONG v_ds = new DS_DM_LOAI_HOP_DONG(); v_us.FillDataset(v_ds); return v_ds.Tables[0]; }