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Semantic Logging Application Block (SLAB) is designed by the
patterns & practices team to help .NET developers move from the unstructured logging approach towards the strongly-typed (semantic) logging approach, making it easier to consume logging information, especially when there is a large volume of log data
to be analyzed. When used out-of-process, the Semantic Logging Application Block uses Event Tracing for Windows (ETW), a fast, lightweight, strongly typed, extensible logging system that is built into the Windows operating system.
The Semantic Logging Application Block enables you to use the EventSource class and semantic log messages in your applications without moving away from the log formats you are familiar with (such as database, text file, Windows Azure table storage).
Importantly, you do not need to commit to how you consume events when developing business logic; you have a unified application-specific API for logging and then you can decide later whether you want those events to go to ETW or alternative destinations.
Official releases are available via
NuGet. You can also head to
msdn.com/entlib for additional information, documentation, videos, and hands-on labs.
If you want to try out the latest changes that have not been officially released yet, signed interim builds of the SLAB code base are available via
We use the Issue Tracker for updating the product backlog (both feature requests and bugs).
We welcome your contributions. Check out project and contribution
[July 7, 2014] 2.0
[March 27, 2014] 1.1
released - now supporting activity tracing and Elasticsearch sink
Last edited Jul 8, 2014 at 9:30 PM by bennage, version 22
Simple to configure and use in development. I did not use it in production yet since no app with semantic logging has been released ... (more)