public class AddressObject
{
#region Поля
public Guid AoGuid { get; set; }
public int? PostalCode { get; set; }
}var formatter = new XmlSerializer(typeof(AddressObject[]), new XmlRootAttribute(AddressObject.Root));
using var fs = new FileStream(anorm, FileMode.OpenOrCreate);
var addressObjects = (AddressObject[])formatter.Deserialize(fs);<Object POSTALCODE="689450" />
<Object />
<Object POSTALCODE="д67" />
<Object POSTALCODE="" />