public class Community
{
    public string Author { get; set; }
    public int CommunityId { get; set; }
    public string Name { get; set; }
    [XmlArray]
    [XmlArrayItem(typeof(RegisteredAddress))]
    [XmlArrayItem(typeof(TradingAddress))]
    public List<Address> Addresses { get; set; }
}

public class Address
{
    private string _postCode;

    public string AddressLine1 { get; set; }
    public string AddressLine2 { get; set; }
    public string AddressLine3 { get; set; }
    public string City { get; set; }
    public string Country { get; set; }

    public string PostCode
    {
        get { return _postCode; }
        set {
            // validate post code e.g. with RegEx
            _postCode = value; 
        }
    }
}

public class RegisteredAddress : Address { }
public class TradingAddress : Address { }

并将社区类的实例序列化为xml：

Community community = new Community {
    Author = "xxx xxx",CommunityId = 0,Name = "name of community",Addresses = new List<Address> {
        new RegisteredAddress {
            AddressLine1 = "xxx",AddressLine2 = "xxx",AddressLine3 = "xxx",City = "xx",Country = "xxxx",PostCode = "0000-00"
        },new TradingAddress {
            AddressLine1 = "zz",AddressLine2 = "xxx"
        }
    }
};

XmlSerializer serializer = new XmlSerializer(typeof(Community));
serializer.Serialize(File.Create("file.xml"),community);

我认为有点谷歌搜索将帮助您了解如何从文件反序列化社区对象.