XmlIgnore是一个自定义属性，用来指明在序列化时是否序列化一个属性。如下面的例子：

　　public class Group
    {

        public string GroupName;
        [XmlIgnore]
        public string Comments;
    }

 

在序列化时，其结果如下所示

<?xml version="1.0" encoding="utf-8"?>
<Group xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <GroupName>.Net</GroupName>
</Group>

　　

我们可以看到，因为设置了XmlIgnore,所以Comments没有被序列化。对于已经设置了XmlIgnore的属性，也可以通过XmlAttributeOverrides 来重新第一序列化时是否需要序列化。

　　　　 public XmlSerializer CreateOverrider()
        {
            XmlAttributeOverrides overr = new XmlAttributeOverrides();
            XmlAttributes attrs = new XmlAttributes();

            attrs.XmlIgnore = true;
            overr.Add(typeof(Group), "Comments", attrs);

            attrs = new XmlAttributes();
            attrs.XmlIgnore = false;
            overr.Add(typeof(Group), "GroupName", attrs);

            XmlSerializer serilizer = new XmlSerializer(typeof(Group), overr);
            return serilizer;
        }

        public void SerializeObject(string filename)
        {
            XmlSerializer serializer = CreateOverrider();
            Group group = new Group();
            group.GroupName = ".Net";
            group.Comments = "Microsoft .net 3.5";

            StreamWriter writer = new StreamWriter(filename);
            serializer.Serialize(writer, group);
            writer.Close();
        }

 

这段代码，其结果与上面的相反，序列化了Comments,而不包含GroupName.