public void UpdatePersonalNumber(PersonalNumberDTO personalNumberDTO)
        {
            PersonalNumber personalNumber = DB.PersonalNumbers.Get(personalNumberDTO.Id);

            if (personalNumber == null)
            {
                throw new ValidationException("Личный номер не найден!", "");
            }
            else
            {
                personalNumber.Id     = personalNumberDTO.Id;
                personalNumber.UserId = personalNumberDTO.UserId;
                DB.PersonalNumbers.Update(personalNumber);
                DB.Save();
            }
        }
        public void CreatePersonalNumber(PersonalNumberDTO personalNumberDTO)
        {
            PersonalNumber personalNumber = DB.PersonalNumbers.Find(p => p.PersonalNum == personalNumberDTO.PersonalNum).FirstOrDefault();

            if (personalNumber == null)
            {
                DB.PersonalNumbers.Create(new PersonalNumber
                {
                    Id          = personalNumberDTO.Id,
                    UserId      = personalNumberDTO.UserId,
                    PersonalNum = personalNumberDTO.PersonalNum
                });
                DB.Save();
            }
            else
            {
                throw new ValidationException("Такой личный номер уже существует!", "");
            }
        }