WCF Request logging

gistfile1.xml

...

  <system.diagnostics>
    <sources>
      <source name="System.ServiceModel"
              switchValue="Information, ActivityTracing"
              propagateActivity="true">
        <listeners>
          <add name="traceListener"
              type="System.Diagnostics.XmlWriterTraceListener"
              initializeData="D:\WebTrace.svclog"  />
        </listeners>
      </source>
    </sources>
  </system.diagnostics>
</configuration>