public bool UpdateDescription(string sessionID, Stream data)
        {
            var content_type = WebOperationContext.Current.IncomingRequest.ContentType;

            byte[] bytes;
            using (var ms = new MemoryStream())
            {
                data.CopyTo(ms);
                bytes = ms.ToArray();
            }
            var s = System.Text.Encoding.UTF8.GetString(bytes);

            return(DataMarshal.UpdateDescription(sessionID, s));
        }