String dbaseEmail1 = (string)xPerson.Element("eMail");
if (String.IsNullOrEmpty(dbaseEmail1))
    contact.EmailAddresses[EmailAddressKey.EmailAddress1] = null;
else
    contact.EmailAddresses[EmailAddressKey.EmailAddress1] = new EmailAddress(dbaseEmail1);

String dbaseEmail2 = (string)xPerson.Element("Email2");
if (String.IsNullOrEmpty(dbaseEmail2))
    contact.EmailAddresses[EmailAddressKey.EmailAddress2] = null;
else
    contact.EmailAddresses[EmailAddressKey.EmailAddress2] = new EmailAddress(dbaseEmail2);

String dbaseEmail3 = (string)xPerson.Element("Email3");
if (String.IsNullOrEmpty(dbaseEmail3))
    contact.EmailAddresses[EmailAddressKey.EmailAddress3] = null;
else
    contact.EmailAddresses[EmailAddressKey.EmailAddress3] = new EmailAddress(dbaseEmail3);

contact.Update(ConflictResolutionMode.AlwaysOverwrite);

EmailAddress email1;
contact.EmailAddresses.TryGetValue(EmailAddressKey.EmailAddress1, out email1);