The underlying connection was closed...

Question

Dear all,

                   I got an error like "the underlying connection was closed a connection that was expected to be kept alive was closed by server"   when send a post request to the server by API. Getting this error alternate.  if the call with HTTP then working fine but call with HTTPS then return the same error.give me response this problem. what do I change in client side or Server side? 

 

My client code 

 

 

HttpWebRequest req = (HttpWebRequest)(HttpWebRequest.Create("https://abc.com"));

req.Method = "POST";

req.ProtocolVersion = HttpVersion.Version11;

req.ContentType = "application/xml";

req.Timeout = ResponseTimeOut;

req.Headers.Set(HttpRequestHeader.Authorization, "Basic api key");

d1 = DateTime.Now;

string content = authXMLString;

req.ContentLength = content.Length;

Stream wri = req.GetRequestStream();

byte[] array = Encoding.UTF8.GetBytes(content);

wri.Write(array, 0, array.Length);

wri.Flush();

wri.Close();

HttpWebResponse HttpWResp = (HttpWebResponse)req.GetResponse();

int resCode = (int)HttpWResp.StatusCode;

StreamReader reader = new StreamReader(HttpWResp.GetResponseStream(), System.Text.Encoding.UTF8);

string resultData = reader.ReadToEnd();

d2 = DateTime.Now;

decodedresult = resultData;

decodedresult = decodedresult.Replace("<", "<");

decodedresult = decodedresult.Replace(">", ">");