/// <summary>
        /// Stores message header + specified number lines of message body to the specified stream.
        /// </summary>
        /// <param name="stream">Stream where to store data.</param>
        /// <param name="lineCount">Number of lines to get from message body.</param>
        /// <exception cref="ObjectDisposedException">Is raised when this object is disposed and this method is accessed.</exception>
        /// <exception cref="ArgumentNullException">Is raised when argument <b>stream</b> value is null.</exception>
        /// <exception cref="InvalidOperationException">Is raised when message is marked for deletion and this method is accessed.</exception>
        /// <exception cref="POP3_ClientException">Is raised when POP3 serveer returns error.</exception>
        public void MessageTopLinesToStream(Stream stream, int lineCount)
        {
            if (this.IsDisposed)
            {
                throw new ObjectDisposedException(this.GetType().Name);
            }
            if (stream == null)
            {
                throw new ArgumentNullException("Argument 'stream' value can't be null.");
            }
            if (this.IsMarkedForDeletion)
            {
                throw new InvalidOperationException("Can't access message, it's marked for deletion.");
            }

            m_Pop3Client.GetTopOfMessage(this.SequenceNumber, stream, lineCount);
        }