/// <summary>
        /// Fire and forget close
        /// </summary>
        public override async Task CloseOutputAsync(WebSocketCloseStatus closeStatus, string statusDescription, CancellationToken cancellationToken)
        {
            if (_state == WebSocketState.Open)
            {
                _state = WebSocketState.Closed; // set this before we write to the network because the write may fail

                using (MemoryStream stream = _recycledStreamFactory())
                {
                    ArraySegment <byte> buffer = BuildClosePayload(closeStatus, statusDescription);
                    WebSocketFrameWriter.Write(WebSocketOpCode.ConnectionClose, buffer, stream, true, _isClient);
                    Events.Log.CloseOutputNoHandshake(_guid, closeStatus, statusDescription);
                    Events.Log.SendingFrame(_guid, WebSocketOpCode.ConnectionClose, true, buffer.Count, true);
                    await WriteStreamToNetwork(stream, cancellationToken);
                }
            }
            else
            {
                Events.Log.InvalidStateBeforeCloseOutput(_guid, _state);
            }

            // cancel pending reads
            _internalReadCts.Cancel();
        }