将Xml反序列化为对象时出错-{<string-xmlns='http://tempuri.org/“>不是预期的。}

我在尝试将XML反序列化为对象时遇到问题, 我收到错误消息

"There is an error in XML document (2, 2)."

内部异常:

"<string xmlns='http://tempuri.org/'> was not expected."

我在以下链接中尝试了解决方案: Error Deserializing Xml to Object - xmlns='' was not expected , xmlns=''> was not expected. - There is an error in XML document (2, 2) while DeserializeXml to object

    bulk_response result = ConvertXMLString.convertXMLStringToObject<bulk_response>(response);

以下是我的反序列化代码:

public static T convertXMLStringToObject<T>(string input) where T : class
        {
            try
            {
                System.Xml.Serialization.XmlSerializer ser = new System.Xml.Serialization.XmlSerializer(typeof(T));

                using (StringReader sr = new StringReader(input))
                {
                    return (T)ser.Deserialize(sr);
                    sr.Close();
                }
            }
            catch (Exception ex)
            {
                return null;
            }
        }

这是我的课:

  public class bulk_response
    {
        public string status_code { get; set; }
        public string status_text { get; set; }
        public string transaction_id { get; set; }
    }

我找不到什么问题?

这是我从http post响应中获得的xml:

<?xml version="1.0" encoding="utf-8"?>
<string xmlns="http://tempuri.org/"><?xml version="1.0" encoding="utf-16"?>
<bulk_response xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <status_code>hansen</status_code>
  <status_text>angie</status_text>
  <transaction_id>ini testing aja</transaction_id>
</bulk_response></string>

HttpWebRequest httpReq = (HttpWebRequest)WebRequest.Create(destinationUrl);
// add the parameters as key valued pairs making
// sure they are URL encoded where needed
ASCIIEncoding encoding = new ASCIIEncoding();
byte[] postData = encoding.GetBytes(param);
httpReq.ContentType = "application/x-www-form-urlencoded";
httpReq.Method = "POST";
httpReq.ContentLength = postData.Length;
// convert the request to a steeam object and send it on its way
Stream ReqStrm = httpReq.GetRequestStream();
ReqStrm.Write(postData, 0, postData.Length);
ReqStrm.Close();
// get the response from the web server and
// read it all back into a string variable
HttpWebResponse httpResp = (HttpWebResponse)httpReq.GetResponse();
StreamReader respStrm = new StreamReader(
httpResp.GetResponseStream());
string result = respStrm.ReadToEnd();
httpResp.Close();
respStrm.Close();

return result;