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1. How do I configure WCF Diagnostics Tracing in web.config without code changes?

Part of the WCF Diagnostics Tracing troubleshooting and FAQ guide.

Add <system.diagnostics> section to web.config with trace sources for System.ServiceModel (service-level tracing) and System.ServiceModel.MessageLogging (message-level tracing). Configure file listener to write to shared folder accessible by Pickup Service. Set DefaultMessageType appSetting for Message Type detection. Enable propagateActivity="true" for activity correlation. See Configuration guide for complete web.config examples with namespace declarations, trace filters, and message logging options.

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