public string GetResponseBody(HttpWebResponse response)

       {

           string responseBody = string.Empty;

           if (response.ContentEncoding.ToLower().Contains("gzip"))

           {

               using (GZipStream stream = new GZipStream(response.GetResponseStream(),CompressionMode.Decompress))

               {

                   using (StreamReaderreader = new StreamReader(stream))

                   {

                       responseBody = reader.ReadToEnd();

                   }

               }

           }

           else if (response.ContentEncoding.ToLower().Contains("deflate"))

           {

               using (DeflateStream stream = new DeflateStream(response.GetResponseStream(),CompressionMode.Decompress))

               {

                   using (StreamReader reader = new StreamReader(stream, Encoding.UTF8))

                   {

                       responseBody = reader.ReadToEnd();

                   }

               }

           }

           else

           {

               using (Stream stream = response.GetResponseStream())

               {

                   using (StreamReader reader = new StreamReader(stream, Encoding.UTF8))

                   {

                       responseBody = reader.ReadToEnd();

                   }

               }

           }

           return responseBody;

       }