Playing around with .NET TraceSource, a nicer "primitive" way of debug/trace logging than just using {Debug,Trace}.WriteLine(). More "primitive" (and lighter weight) than Enterprise Library logging.

TraceSourcePlay.cs

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Runtime.CompilerServices;
using System.Text;
using System.Threading.Tasks;

namespace TraceSourcePlay
{
    class Program
    {
        static TraceSource ts = new TraceSource("TSPlay");

        static void Main(string[] args)
        {
            //var ts = new TraceSource("TSPlay");
#if TRACE
            Console.WriteLine( "TRACE is on");
#else
            Console.WriteLine( "TRACE is off");
#endif
            Debug.WriteLine( "Debug.WriteLine()"  );
            Trace.WriteLine( "Trace.WriteLine()"  );
            ts.TraceInformation( "Trace info"  );
            foo();
            ts.TraceInformation( "foo done"  );
            Console.WriteLine( "(press any key to continue)");
            Console.ReadKey();
            Console.WriteLine( "Done.");
        }

        static void foo()
        {
            Trace.Indent(); // This doesn't seem to work.
            traceSourceIndent();
            var st = new StackTrace();
            ts.TraceData( TraceEventType.Warning, 0, new object[] {"text message", st} );
            Trace.Unindent();
            traceSourceUnindent();
        }

        static void traceSourceIndent()
        {
            //var traceListener = ts.Listeners["file"];
            //if (traceListener != null) traceListener.IndentLevel++;
            foreach (var listener in ts.Listeners)
            {
                ((TraceListener) listener).IndentLevel++;
            }
        }

        static void traceSourceUnindent()
        {
            //var traceListener = ts.Listeners["file"];
            //if (traceListener != null) traceListener.IndentLevel--;
            foreach (var listener in ts.Listeners)
            {
                ((TraceListener)listener).IndentLevel--;
            }
        }
    }
}

zApp.config.xml

<?xml version="1.0" encoding="utf-8" ?>
<!-- (This is App.config in your Visual Studio solution, I just named it with a leading "z" to make it sort properly
    and not mess up the name of this gist. -->
<configuration>
    <startup> 
        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5.2" />
    </startup>
  <system.diagnostics>
    <sources>
      <source name="TSPlay"> <!-- default switchName is same as source name. -->
        <!-- Listeners here are for TraceSource calls, although indentation and autoflush are controlled by "trace" section, below. -->
        <listeners>
          <add name="consoleListener"/>
          <add name="file"/>
        </listeners>
      </source>
      <!-- There can be only one source with name "TSPlay". switchName attributes will overwrite, 
            in the order in which they are encountered in this config file. -->
      <!--<source name="TSPlay" switchName="Main">
        <listeners>
          <add name="consoleListener"/>
        </listeners>
      </source>
      <source name="TSPlay" switchName="foo">
        <listeners>
          <add name="consoleListener"/>
        </listeners>
      </source>-->
    </sources>
    <switches>
      <add name="TSPlay" value="All"/>
      <add name="Main" value="All"/>
      <add name="foo" value="All"/>
    </switches>
    <sharedListeners>
      <add name="consoleListener" type="System.Diagnostics.ConsoleTraceListener" initializeData="false"/>
      <add name="file" type="System.Diagnostics.TextWriterTraceListener" initializeData="C:\\tsplay.log"/>
    </sharedListeners>
    <trace autoflush="true" indentsize="2">
      <!-- Listeners here are for Trace and Debug calls, not TraceSource. -->
      <listeners>
        <!--<add name="consoleListener"/>-->
      </listeners>
    </trace>
  </system.diagnostics>
</configuration>