C# (CSharp) Records.Except примеры использования

Пример #1

        public void ValidateNameUniqness()
        {
            List <IRecord> localRecordsList = Records.GroupBy(record => record.Name).Select(item => item.First()).ToList();

            FailedRecords.AddRange(Records.Except(localRecordsList));
            Records = localRecordsList;
        }