How to enable the WCF Tracing

WCF tracing is built on top of System.Diagnostics. To use tracing, you should define trace sources in the configuration file or in code.   

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

  For more, see https://msdn.microsoft.com/en-us/library/ms733025(v=vs.110).aspx