<system.net>
     <defaultProxy>
         <proxy proxyaddress="http://127.0.0.1:9999" />
      </defaultProxy>
</system.net>

<system.diagnostics>
    <trace autoflush="true" />
    <sources>
      <source name="System.Net">
        <listeners>
          <add name="System.Net"/>
        </listeners>
      </source>
      <!--<source name="System.Net.Sockets">
        <listeners>
          <add name="System.Net"/>
        </listeners>
      </source>-->
      <!--<source name="System.Net.Cache">
        <listeners>
          <add name="System.Net"/>
        </listeners>
      </source>-->
    </sources>
    <sharedListeners>
      <add
          name="System.Net"
          type="System.Diagnostics.TextWriterTraceListener"
          initializeData="System.Net.trace.log"
        />
    </sharedListeners>
    <switches>
      <add name="System.Net" value="Verbose" />
      <add name="System.Net.Sockets" value="Verbose" />
      <add name="System.Net.Cache" value="Verbose" />
    </switches>
  </system.diagnostics>