C#和sql结合，返回刚新增的ID主键的值

#region----新增一条预约活动表数据----
        /// <summary>
        /// 新增一条预约活动表数据
        /// </summary>
        /// <param name="appointmentEntity"></param>
        /// <returns></returns>
        public int InsertAppointment(Appointment appointmentEntity)
        {
            string sql = @"
                insert into Appointment 
                (
                BID,Title,PicUrl,ErpStoreID,Phone,
                AddressInfo,AddressMap,ApDesc,ApUseDesc,BeginDate,
                EndDate,Interval,AdvanceCycDay,LimiteBuy,LimiteBuy_Total,
                LimiteBuy_Day,LimiteBuy_Trade,IsNeedUserPhone,IsValPhone,CusInputeInfo,
                InterValType,InterValSize,Status,CreateDate,UpdateDate
                )
                values
                (
                @BID,@Title,@PicUrl,@ErpStoreID,@Phone,
                @AddressInfo,@AddressMap,@ApDesc,@ApUseDesc,@BeginDate,
                @EndDate,@Interval,@AdvanceCycDay,@LimiteBuy,@LimiteBuy_Total,
                @LimiteBuy_Day,@LimiteBuy_Trade,@IsNeedUserPhone,@IsValPhone,@CusInputeInfo,
                @InterValType,@InterValSize,@Status,@CreateDate,@UpdateDate
                )
                SELECT  @@IDENTITY  as  'ApID'
                    ";
            //ExecuteScalar,返回刚刚插入的ID的值
            var insertResultId = _dbBase.ExecuteScalar(sql, appointmentEntity);
            int insertId = Convert.ToInt32(insertResultId);
            return insertId;
        }
        #endregion----新增一条预约活动表数据----