WebRequest myHttpWebRequest = WebRequest.Create(;
// Set the 'Method' property of the 'Webrequest' to 'POST'.
myHttpWebRequest.Method = " POST " ;

// Create a new string object to POST data to the Url.
string postData = @" <?xml version= " 1.0 " encoding= " UTF - 8 " ?>
< ROOT >
< CONFIG >
< TYPE > IN </ TYPE >
< WORKTYPE > 2 </ WORKTYPE >
</ CONFIG >
< DATA >
< POLICY >
< UNITCODE > 分公司代码 </ UNITCODE >
< APPLYNO > 投保单号码 </ APPLYNO >
< APPLYENDORSENO > 批单申请号码 </ APPLYENDORSENO >
</ POLICY >
</ DATA >
</ ROOT > " ;

ASCIIEncoding encoding = new ASCIIEncoding ();
byte [] byte1 = encoding.GetBytes (postData);

// Set the content type of the data being posted.
myHttpWebRequest.ContentType = " application/x-www-form-urlencoded " ;

// Set the content length of the string being posted.
myHttpWebRequest.ContentLength = byte1.Length;

Stream newStream = myHttpWebRequest.GetRequestStream ();

newStream.Write (byte1, 0 , byte1.Length);
// Close the Stream object.
newStream.Close ();

HttpWebResponse response = myHttpWebRequest.GetResponse();

StreamReader reader = new StreamReader (Reqeust.InputStream);
String xml = reader.ReadToEnd();