C# 将字符串（符合xml格式）转换为XmlDocument

         /// 
        /// 将字符串（符合xml格式）转换为XmlDocument
        /// 
        /// XML格式字符串
        /// 
        public XmlDocument ConvertStringToXmlDocument(string xmlString)
        {
            XmlDocument document = new XmlDocument();
            document.LoadXml(xmlString);
            return document;
        }