public sealed class TraceProvidingSource : ITraceWriter

public class TraceDemo
{
    private static TraceProvidingSource trace = null;

    #region Constructor
    /// <summary>
    /// Initializes the class specific elements.
    /// </summary>
    static TraceDemo()
    {
        // Create trace source for infrastructure
        trace = TraceProvider.GetTraceSource(TraceProvidingSoftwareLayerName.Infrastructure);

        // Configure the .NET System trace settings.
        System.Diagnostics.Trace.AutoFlush = true;

        // Configure the weroSoft Core Library Trace.
        TraceProvider.Current.SwitchTraceToLevel(System.Diagnostics.SourceLevels.All);
        TraceProvider.Current.SetTraceToListener("MyListener", @"C:\Temp\MyTraceFile.trace", true);
        TraceProvider.LockSourceMode(TraceSourceProviderMode.AdvancedDateTime);
    }
    ...
    ...
    ...

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <system.diagnostics>
    <sources>
      <source name="Infrastructure" switchType="System.Diagnostics.SourceSwitch" switchValue="All">
        <listeners>
          <add name="UnitTestTrace"/>
        </listeners>
      </source>
    </sources>
    <!-- Defines the listener used for creating the output -->
    <sharedListeners>
      <add name="UnitTestTrace" type="WeroSoft.Diagnostics.TraceStandardFileListener, WeroSoft.Core.Library" initializeData="WorkflowUnitTest.trace" autoRemove="true"/>
    </sharedListeners>
    <!-- Keep this value as defined -->
    <trace autoflush="true"/>
  </system.diagnostics>
</configuration>

public class TraceDemo
{
  public static TraceProvidingSource Trace { get; } = TraceProvider.GetTraceSource(TraceProvidingSoftwareLayerName.Infrastructure);
  ...
  ...
  ...