Add the following to the app.exe.config file (must reside in the same folder and the app.exe):

<configuration>
...
<system.diagnostics>
    <sources>
      <source name="srcEzFITDebug" switchName="SourceSwitch" >
        <listeners>
          <add name="textListener" />
        </listeners>
      </source>
    </sources>
    <switches>
      <add name="SourceSwitch" value="All" />
    </switches>
    <sharedListeners>
      <add name="textListener"
           type="System.Diagnostics.TextWriterTraceListener"
           initializeData="Debug.txt" />
    </sharedListeners>
    <trace autoflush="true" indentsize="4"></trace>
</system.diagnostics>
 
</configuration>