EventWaitHandle не передает сигнал с HttpClient

Question

        static EventWaitHandle waitHandle = new AutoResetEvent(false);
    private async Task StartTrade(CancellationToken ct)
    {
        _ = OandaJsonStream(ct);
        waitHandle.WaitOne();
        Console.WriteLine("HEY");
    }


    private async Task DeserializeFromStream(CancellationToken ct)
    {
      try
      { ///  waitHandle.Set();  It works if I place it here
        using (var client = new HttpClient())
        client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
        client.DefaultRequestHeaders.Add("APP_VERSION", "1.0.0");
        client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", "3c804286df0f9a3151c0452719c0fb5c-d19af58209cb567d40eefe605f8b30f5");
        using (var request = new HttpRequestMessage(HttpMethod.Get, "https://stream-fxpractice.oanda.com/v3/accounts/101-004-4455670-001/pricing/stream?instruments=EUR_USD"))
        using (var response = await client.SendAsync(request, HttpCompletionOption.ResponseHeadersRead, ct))
        {
            var stream = await response.Content.ReadAsStreamAsync();
            using (StreamReader sr = new StreamReader(stream))
            using (JsonTextReader reader = new JsonTextReader(sr))
            {
               reader.SupportMultipleContent = true;
               await Task.Run(() =>
               {
                   while (reader.Read()) 
                   {
                      if (reader.TokenType == JsonToken.StartObject)
                      {                                   
                        JObject obj = JObject.Load(reader);// Load each object from the stream and do something with it
                        Dispatcher.BeginInvoke((Action)(() => { debugOutput(obj["time"].ToString()); }));
                           waitHandle.Set(); // It does not work if I place it here!
                           Console.WriteLine(obj);
                      } ct.ThrowIfCancellationRequested();
                   }
                }, ct);
            }
        }
      }
       catch (HttpRequestException ex) {System.Windows.MessageBox.Show("Error. " + ex.Message);}
       catch (OperationCanceledException) {System.Windows.MessageBox.Show("Your submission was canceled.");}
    }

Если я помещу строку "waitHandle.Set ();" сразу после «try {» это работает, но если я помещаю строку в l oop или где-либо еще после «using», это не сигнализирует. Может кто-нибудь помочь мне, пожалуйста. Спасибо.