如何序列化部分属性

public string Serialize<BusinessObject>(List<BusinessObject> GenericList)
        {
            XmlDocument result = new XmlDocument();

            XmlDeclaration del = result.CreateXmlDeclaration("1.0", "utf-8", null);
            result.AppendChild(del);

            result.LoadXml("<Records></Records>");
            foreach (BusinessObject obj in GenericList)
            {
                XmlElement Item = result.CreateElement("Record");
                if (obj != null)
                {
                    PropertyInfo[] properties = obj.GetType().GetProperties();
                    foreach (PropertyInfo property in properties)
                    {
                        if (property.GetValue(obj, null) != null)
                        {
                            Item.SetAttribute(property.Name, property.GetValue(obj, null).ToString());
                        }
                    }
                }
                result.DocumentElement.AppendChild(Item);
            }
            return result.InnerXml;
        }