public static PhoneNumberAddResults AddPhoneNumbers1And2(
            IEnumerable <AddressCsv> numbers,
            IEnumerable <AlbaAddressExport> addresses,
            int territoryId = 0)
        {
            var output = new List <AlbaAddressImport>();
            var map    = addresses.ToDictionary(a => (int)a.Address_ID);

            var errors = new List <AddressCsv>();

            foreach (var number in numbers)
            {
                if (!map.ContainsKey((int)number.Address_ID))
                {
                    errors.Add(number);
                    continue;
                }

                var address = map[(int)number.Address_ID];

                address.Notes_private += AppendAsLine(
                    address.Notes_private,
                    $"List-Service-Added-Date: {DateTime.Now:yyyy-MM-dd}");

                string exsistingTelephone = string.IsNullOrWhiteSpace(address.Telephone)
                    ? "NONE"
                    : address.Telephone;

                string phone1 = string.IsNullOrWhiteSpace(number.Phone1)
                    ? "NONE"
                    : number.Phone1;

                string phone2 = string.IsNullOrWhiteSpace(number.Phone2)
                    ? "NONE"
                    : number.Phone2;

                string tel = string.IsNullOrWhiteSpace(address.Telephone)
                    ? "NONE"
                    : address.Telephone;

                address.Notes_private += AppendAsLine(
                    address.Notes_private,
                    $"List-Service-Existing-Telephone: {tel}");

                address.Notes_private += AppendAsLine(
                    address.Notes_private,
                    $"List-Service-Phone1: {phone1}");

                address.Notes_private += AppendAsLine(
                    address.Notes_private,
                    $"List-Service-Phone2: {phone2}");

                address.Notes_private += AppendAsLine(
                    address.Notes_private,
                    $"List-Service-Source-Territory-Number: {address.Territory_number}");

                // Delete duplicates
                if (AreEqual(address.Telephone, number.Phone1))
                {
                    number.Phone1 = null;
                }

                // Delete duplicates
                if (AreEqual(address.Telephone, number.Phone2) ||
                    AreEqual(number.Phone1, number.Phone2))
                {
                    number.Phone2 = null;
                }

                if (territoryId > 0 &&
                    (!string.IsNullOrWhiteSpace(number.Phone1) ||
                     !string.IsNullOrWhiteSpace(number.Phone2)))
                {
                    address.Territory_ID = territoryId;
                }

                // Shift Phone2 to Phone1
                if (string.IsNullOrWhiteSpace(number.Phone1))
                {
                    number.Phone1 = number.Phone2;
                    number.Phone2 = null;
                }

                // Shift Phone1 to Telephone
                if (string.IsNullOrWhiteSpace(address.Telephone))
                {
                    address.Telephone = number.Phone1;
                    number.Phone1     = number.Phone2;
                    number.Phone2     = null;
                }

                if (!string.IsNullOrWhiteSpace(number.Phone1))
                {
                    address.Notes += AppendAsLine(
                        address.Notes,
                        $"Extra-Phone-1: { number.Phone1}");
                }

                if (!string.IsNullOrWhiteSpace(number.Phone2))
                {
                    address.Notes += AppendAsLine(
                        address.Notes,
                        $"Extra-Phone-2: { number.Phone2}");
                }

                var addressSaveData = AlbaAddressImport.From(address);

                output.Add(addressSaveData);
            }

            return(new PhoneNumberAddResults
            {
                SuccessfulAddresses = output,
                Errors = errors
            });
        }