The AspTraceTarget is a wrapper around HttpContext.Trace.  

It has these properties that can be overridden:

• Name - Defaults to AspTraceTarget
• LoggingMode - Defines which mode to use for the target; Synchronous, Buffered, or Asynchronous.  The default is Synchronous.
• MessageFormat - What to output in the log.  See the Message Format topic for more information.
• DateFormat - The date format for the %LogTime% variable in the MessageFormat. See the Date Format topic for more information.
• MinimumLevel - The minimum logging level to log a message.
• AssemblyNameFilter - If specified, only log for a specific assembly name.  See the Filtering topic.
• NamespaceFilter - If specified, only log for a specific namespace.  See the Filtering topic.
• ClassNameFilter - If specified, only log for a specific class name.  See the Filtering topic.
• MethodNameFilter - If specified, only log for a specific method name.  See the Filtering topic.
• ThreadNameFilter - If specified, logging will only occur for the thread id or thread name specified. See the Filtering topic.
• UserNameFilter - If specified, logging will only occur for the specific user name.  See the Filtering topic.
• MachineNameFilter - If specified, logging will only occur for the specific machine name.  See the Filtering topic.
• BufferSize -  When a logging target has a Mode of Buffered, this is how often messages are committed.  See the Buffered Logging topic.

 

//Example runtime configuration, can also use log.config, app.config, or web.config
Log.ResetConfiguration();   
AspTraceTarget target = new AspTraceTarget();       
Log.Config.Targets.Add(target);

Log.Debug("This is a test");