private async void btn_service_alumnado_get(object sender, RoutedEventArgs e) { using (var loggerFactory = LoggerFactory.Create(builder => builder.AddConsole())) { using (var tracer = Tracing.InitTracer("wpf-example", loggerFactory)) { //await _serviceAlumnado.getAlumnos(); using (var scope = tracer.BuildSpan("call-service").StartActive(true)) { using (var scope1 = tracer.BuildSpan("format-string") .WithTag(Tags.HttpMethod, "GET") .WithTag(Tags.HttpUrl, $"{Constant.BaseAdressServices.URI_ALUMNADO}") .StartActive(true)) { var response = string.Empty; try { HttpClient _client = new HttpClient(); response = await _client.GetStringAsync(Constant.BaseAdressServices.URI_ALUMNADO); } catch (Exception ex) { response = ex.ToString(); } scope1.Span.Log(new Dictionary <string, object> { [LogFields.Event] = "string.Format", ["value"] = response }); //return response; } } } } }