DataContact 操作符重载的问题

悬赏园豆：20 [已关闭问题] 关闭于 2009-01-02 08:30

Code
[DataContract]
    public class UserProfile 
    {
        private XmlDocument xmldoc;

        [DataMember]
        public XmlDocument XmlDoc
        {
            get { return xmldoc; }
            set { xmldoc = value; }
        }

        public void LoadXml(string xml)
        {
            this.xmldoc = new XmlDocument();
            xmldoc.LoadXml(xml);
        }

        public static UserProfile operator +(UserProfile profile1, UserProfile profile2)
        public override bool Equals(object obj)
}