class Program

    {

        static void Main(string[] args)

        {

            const string uri = "http://127.0.0.1/adde61103208ff33deb6e8fa70f79706";

            var req = WebRequest.Create(uri) as HttpWebRequest;

            //req.ContentType = "application/octet-stream";

            if (req != null)

            {

                var response = req.GetResponse() as HttpWebResponse;

                if (response != null)

                {

                    Console.WriteLine("ContentType:" + response.ContentType);

                    var stream = response.GetResponseStream();

                    if (stream != null)

                    {

                        string format = string.Empty;

                        switch (response.ContentType)

                        {

                            case "image/jpeg":

                                format = "jpg";

                                break;

                            case "audio/amr":

                                format = "amr";

                                break;

                        }

                        var path = string.Format(@"c:\\1.{0}", format);

                        //var fs = new FileStream($"c:\\1.{format}", FileMode.Create);

                        var fs = File.Create(path);

                        int count = ;

                        do

                        {

                            var buffer = new byte[];

                            count = stream.Read(buffer, , buffer.Length);

                            fs.Write(buffer, , count);

                        } while (count > );

                    }

                }

            }

            Console.ReadKey();

      }

}