/// <inheritdoc/> protected override async Task <HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken) { if (request == null) { throw new ArgumentNullException(nameof(request)); } HttpResponseMessage response = null; string method = request.Method.Method; using (ClientRequestActivity activity = ClientRequestActivity.Create(method, request.RequestUri)) { request.Headers.Add(MessageHeaderKeys.ActivityId, activity.Id.ToString("N")); response = await base.SendAsync(request, cancellationToken).ConfigureAwait(false); // todo: user id resolver activity.SetResponse((int)response.StatusCode, Guid.Empty); } return(response); }