如何在WCF服务中记录原始请求

<ServiceDebugBehavior>
  <IncludeExceptionDetailInFaults>False</IncludeExceptionDetailInFaults>
  <TraceContext>
    <Listeners>
      <Listener, MyTraceListener, MyTracingConfig>
      </Listeners>
    </TraceContext>
  </ServiceDebugBehavior>

<ServiceDebugBehavior>
  <IncludeExceptionDetailInFaults>False</IncludeExceptionDetailInFaults>
  <ServiceMetadataBehavior>
    <IncludeMetadataReferences>False</IncludeMetadataReferences>
    <ServiceDebug>False</ServiceDebug>
    <ServiceTrace>False</ServiceTrace>
  </ServiceMetadataBehavior>
</ServiceDebugBehavior>

public class ServiceClient : ClientBase<IServiceContract>
{
    public ServiceClient(string endpointConfigurationName,
        ChannelFactory<IServiceContract> channelFactory)
        : base(endpointConfigurationName, channelFactory)
    {
    }

    public override System.ServiceModel.Channels.ServiceChannel GetChannel()
    {
        return new ServiceChannel(base.GetChannel());
    }
}

public class ServiceHost : ServiceHost
{
    public ServiceHost(Type serviceType,
        Uri[] baseAddresses)
        : base(serviceType, baseAddresses)
    {
    }

    protected override ServiceEndpoint CreateDescription()
    {
        return new ServiceEndpoint(
            new Uri(WellKnownServices.WebServices.V1),
            new BasicHttpBinding(),
            new EndpointAddress(new Uri(WellKnownServices.WebServices.V1)));
    }
}