/// <summary>
        /// Internal body parsing.
        /// </summary>
        /// <param name="owner">Owner MIME entity.</param>
        /// <param name="mediaType">MIME media type. For example: text/plain.</param>
        /// <param name="stream">Stream from where to read body.</param>
        /// <param name="body">Multipart body instance.</param>
        /// <exception cref="ArgumentNullException">Is raised when <b>stream</b>, <b>mediaType</b>, <b>stream</b> or <b>body</b> is null reference.</exception>
        /// <exception cref="ParseException">Is raised when any parsing errors.</exception>
        protected static void ParseInternal(MIME_Entity owner,
                                            string mediaType,
                                            SmartStream stream,
                                            MIME_b_Multipart body)
        {
            if (owner == null)
            {
                throw new ArgumentNullException("owner");
            }
            if (mediaType == null)
            {
                throw new ArgumentNullException("mediaType");
            }
            if (stream == null)
            {
                throw new ArgumentNullException("stream");
            }
            if (owner.ContentType == null || owner.ContentType.Param_Boundary == null)
            {
                throw new ParseException("Multipart entity has not required 'boundary' parameter.");
            }
            if (body == null)
            {
                throw new ArgumentNullException("body");
            }

            _MultipartReader multipartReader = new _MultipartReader(stream, owner.ContentType.Param_Boundary);

            while (multipartReader.Next())
            {
                MIME_Entity entity = new MIME_Entity();
                entity.Parse(new SmartStream(multipartReader, false), body.DefaultBodyPartContentType);
                body.m_pBodyParts.Add(entity);
                entity.SetParent(owner);
            }

            body.m_TextPreamble = multipartReader.TextPreamble;
            body.m_TextEpilogue = multipartReader.TextEpilogue;
        }
        /// <summary>
        /// Internal body parsing.
        /// </summary>
        /// <param name="owner">Owner MIME entity.</param>
        /// <param name="mediaType">MIME media type. For example: text/plain.</param>
        /// <param name="stream">Stream from where to read body.</param>
        /// <param name="body">Multipart body instance.</param>
        /// <exception cref="ArgumentNullException">Is raised when <b>stream</b>, <b>mediaType</b>, <b>stream</b> or <b>body</b> is null reference.</exception>
        /// <exception cref="ParseException">Is raised when any parsing errors.</exception>
        protected static void ParseInternal(MIME_Entity owner,
                                            string mediaType,
                                            SmartStream stream,
                                            MIME_b_Multipart body)
        {
            if (owner == null)
            {
                throw new ArgumentNullException("owner");
            }
            if (mediaType == null)
            {
                throw new ArgumentNullException("mediaType");
            }
            if (stream == null)
            {
                throw new ArgumentNullException("stream");
            }
            if (owner.ContentType == null || owner.ContentType.Param_Boundary == null)
            {
                throw new ParseException("Multipart entity has not required 'boundary' parameter.");
            }
            if (body == null)
            {
                throw new ArgumentNullException("body");
            }

            _MultipartReader multipartReader = new _MultipartReader(stream, owner.ContentType.Param_Boundary);
            while (multipartReader.Next())
            {
                MIME_Entity entity = new MIME_Entity();
                entity.Parse(new SmartStream(multipartReader, false), body.DefaultBodyPartContentType);
                body.m_pBodyParts.Add(entity);
                entity.SetParent(owner);
            }

            body.m_TextPreamble = multipartReader.TextPreamble;
            body.m_TextEpilogue = multipartReader.TextEpilogue;
        }