CancellationTokenSource tokenSource = null;
            try
            {
                if (_clientWebSocket != null && (_clientWebSocket.State == WebSocketState.Open || _clientWebSocket.State == WebSocketState.Connecting))
                {
                    tokenSource = new CancellationTokenSource(ConnectionTimeout);

                    await _clientWebSocket.CloseOutputAsync(WebSocketCloseStatus.NormalClosure, "",
                         tokenSource.Token).ConfigureAwait(false);
                    while (_clientWebSocket.State != WebSocketState.Closed && !tokenSource.IsCancellationRequested) ;
                }
            }
            catch { }
            finally
            {
                tokenSource?.Dispose();
            }