public Gram Enqueue(byte[] buffer, int offset, int length) { if (buffer == null) { throw new ArgumentNullException("buffer"); } else if (!(offset >= 0 && offset < buffer.Length)) { throw new ArgumentOutOfRangeException( "offset", offset, "Offset must be greater than or equal to zero and less than the size of the buffer."); } else if (length < 0 || length > buffer.Length) { throw new ArgumentOutOfRangeException( "length", length, "Length cannot be less than zero or greater than the size of the buffer."); } else if ((buffer.Length - offset) < length) { throw new ArgumentException("Offset and length do not point to a valid segment within the buffer."); } int existingBytes = (_pending.Count * m_CoalesceBufferSize) + (_buffered == null ? 0 : _buffered.Length); if ((existingBytes + length) > PendingCap) { throw new CapacityExceededException(); } Gram gram = null; while (length > 0) { if (_buffered == null) { // nothing yet buffered _buffered = Gram.Acquire(); } int bytesWritten = _buffered.Write(buffer, offset, length); offset += bytesWritten; length -= bytesWritten; if (_buffered.IsFull) { if (_pending.Count == 0) { gram = _buffered; } _pending.Enqueue(_buffered); _buffered = null; } } return(gram); }