No, I can not. I am sending HTTP POST reqests from my tool and the body
of these requests has binary form. I could not find the way how to simulate
that with fiddler tool. But I can easyly make dumps with Ethereal.
   The problem now looks for me a little bit different. Exception is raised
not on 200 OK with empty body but rather on something like broken connection
when it takes time for my remote hardware embedded HTTP server to process
incoming request. It happend simply more often when the response was 200 OK
and no message body attached.
   Could the reason of WebException WebExceptionStatus.ReceiveFailure
status be the broken or mishandled connection?
   Am I applying correct procedure for send request/read response?

int ret = 0;

HttpWebResponse hwResponse = null;

Stream sr = null;

HttpWebRequest hwreq = _prepareRequest(cgi,cmdLen);

Stream s = hwr.GetRequestStream();

s.Write(buf,0,len);

s.Close();

try

{

   hwResponse = (HttpWebResponse) hwr.GetResponse();

   if(hwResponse.StatusCode == HttpStatusCode.OK)

   {

       if(hwr.HaveResponse)

       {

           sr = hwResponse.GetResponseStream();

           int offset=0;

           int remaining = len;

           while (remaining > 0)

           {

               int read = sr.Read(buf, offset, remaining);

               if (read <= 0)

                   break;

               remaining -= read;

           offset += read;

       }

       ret = len - remaining;

   }

}

catch(WebException we)

{

   if(we.Status == WebExceptionStatus.ProtocolError)

   {

       throw we;

   }

}

finally

{

   if(sr != null)

       sr.Close();

   if(hwResponse != null)

       hwResponse.Close();

}