See the Microsoft Patterns and Practices[^] section. They have books available for download as PDFs (you can also buy them as books, but the PDFs are complete). One or two go into depth with instrumenting your application, like the Enterprise Instrumention block. As far as trace listeners, the documentation for the TraceListener in the .NET Framework SDK should be sufficient. There isn't much you can do with these, though, which is where the EI comes into play.
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