// BOOK_MASTERテーブルの更新処理
 public int Update_DB_BOOK_MASTER(DB_BOOK_MASTER item)
 {
     lock (Locker)
     {
         return(_db.Update(item));
     }
 }
 // BOOK_MASTERテーブルの追加処理
 public int Insert_DB_BOOK_MASTER(DB_BOOK_MASTER item)
 {
     lock (Locker)
     {
         return(_db.Insert(item));
     }
 }
        private void set_DB_BOOK_MASTER()
        {
            _db.DropTable <DB_BOOK_MASTER>();
            _db.CreateTable <DB_BOOK_MASTER>();
            var item = new DB_BOOK_MASTER();

            DateTime arrivalYmd = DateTime.Now;

            item.BOOK_ID      = 1;
            item.TITLE        = "TEST";
            item.AUTHOR       = "test";
            item.PUBISHER     = "test社";
            item.CATEGORY_ID  = 10;
            item.ARRIBAL_YMD  = arrivalYmd;
            item.DISPOSAL_FLG = false;
            _db.Insert(item);
        }