阿里大于短信返回XML

<?xml version="1.0" encoding="utf-8" ?>
<alibaba_aliqin_fc_sms_num_send_response>
    <result>
        <err_code>0</err_code>
        <model>102330458199^1102997158000</model>
        <success>true</success>
    </result>
    <request_id>z28wpa7p4jz3</request_id>
</alibaba_aliqin_fc_sms_num_send_response>
<!--top010178001118.n.et2-->

<?xml version="1.0" encoding="utf-8" ?>
<error_response>
    <code>50</code>
    <msg>Remote service error</msg>
    <sub_code>isv.invalid-parameter</sub_code>
    <sub_msg>非法参数</sub_msg>
</error_response>

public static SortedDictionary<string, object> AlidayuFromXml(string xml)
        {
            SortedDictionary<string, object> obj = new SortedDictionary<string, object>();
            if (!string.IsNullOrEmpty(xml))
            {
                XmlDocument xmlDoc = new XmlDocument();
                xmlDoc.LoadXml(xml);
                //如果传入的节点个数要比index大才行，要不然就表示节点不存在
                if (xmlDoc.ChildNodes.Count > 1)
                {
                    XmlNode xmlNode = xmlDoc.ChildNodes[1];//获取到根节点<xml>
                    XmlElement xeinit = (XmlElement)xmlNode;
                    if (xmlNode.ChildNodes.Count == 2 || xeinit.Name == "alibaba_aliqin_fc_sms_num_send_response")
                    {
                        XmlNode xmlNodeNext = xmlNode.ChildNodes[0];
                        XmlNodeList nodes = xmlNodeNext.ChildNodes;
                        foreach (XmlNode xn in nodes)
                        {
                            XmlElement xe = (XmlElement)xn;
                            obj[xe.Name] = xe.InnerText;//获取xml的键值对到WxPayData内部的数据中
                        }
                    }
                    else
                    {
                        XmlNodeList nodes = xmlNode.ChildNodes;
                        foreach (XmlNode xn in nodes)
                        {
                            XmlElement xe = (XmlElement)xn;
                            obj[xe.Name] = xe.InnerText;//获取xml的键值对到WxPayData内部的数据中
                        }
                    }
                }
            }
            return obj;
        }