title: Formatting trace output
body: <p>I'm using <code>TextWriterTraceListener</code> to log diagnostics messages to a text file. However I wan't also to log a timestamp of every trace message added. Is it possible to define a kind of formatter for the listener that would automatically add timestamps?</p>
  
  <p>Currently I'm adding timestamps manually on every <code>Trace.WriteLine()</code> call but this isn't very comfortable.</p>