System.IO.BufferedStream.ReadByteSlow C# (CSharp) Méthode

        private int ReadByteSlow()
        {
            Debug.Assert(_readPos == _readLen);

            // We want to check for whether the underlying stream has been closed and whether
            // it's readable, but we only need to do so if we don't have data in our buffer,
            // as any data we have came from reading it from an open stream, and we don't
            // care if the stream has been closed or become unreadable since. Further, if
            // the stream is closed, its read buffer is flushed, so we'll take this slow path.
            EnsureNotClosed();
            EnsureCanRead();

            if (_writePos > 0)
                FlushWrite();

            EnsureBufferAllocated();
            _readLen = _stream.Read(_buffer, 0, _bufferSize);
            if (_readLen == 0)
                return -1;

            _readPos = 0;
            return _buffer[_readPos++];
        }