WebSocketSharp.Net.HttpListener.BeginGetContext C# (CSharp) Method

        public IAsyncResult BeginGetContext(AsyncCallback callback, Object state)
        {
            CheckDisposed ();
            if (!listening)
                throw new InvalidOperationException ("Please, call Start before using this method.");

            ListenerAsyncResult ares = new ListenerAsyncResult (callback, state);

            // lock wait_queue early to avoid race conditions
            lock (((ICollection)wait_queue).SyncRoot) {
                lock (((ICollection)ctx_queue).SyncRoot) {
                    HttpListenerContext ctx = GetContextFromQueue ();
                    if (ctx != null) {
                        ares.Complete (ctx, true);
                        return ares;
                    }
                }

                wait_queue.Add (ares);
            }

            return ares;
        }

        // Loop here to begin processing of new requests.
        private void Listen()
        {
            while (IsListening)
            {
                if (_listener == null)
                {
                    return;
                }

                try
                {
                    _listener.BeginGetContext(ListenerCallback, _listener);
                    _listenForNextRequest.WaitOne();
                }
                catch (Exception ex)
                {
                    _logger.Error("Listen()", ex);
                    return;
                }
                if (_listener == null)
                {
                    return;
                }
            }
        }