C# 异常：从作用域“”引用了“FiasHostApp.Entity.DBEntity.FIAS_RM_v1.ITraNetMgrUnitBaseInfoRecord”类型的变量“w”，但该变量未定义

public string GetNeNameByGTCode(string GT_Code)
        {
            string reVal = "";
            try
            {
                IQueryAgent<ITraNetMgrUnitBaseInfoRecord> ag =
                    MainDB.Dbo.NewQueryAgent<ITraNetMgrUnitBaseInfoRecord>();
                //string like1 = "‘%" + GT_Code + "%‘";
                ag.Select(p => p.NeName);

                ag.Where(w => w.GTCode.Contains(GT_Code))
                   .Take(1);
                var lst = new TraNetMgrUnitBaseInfos(ag);
                if (lst != null && lst.Count > 0)
                    reVal = lst[0].NeName;
            }
            catch (Exception ex)
            {
                log.WriteRecord(LogRecordLevel.Error, "GTCode获取网元异常：{0}", ex.Message + ex.StackTrace);
            }
            return reVal;
        }