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Asked: 2026-05-12T08:11:50+00:00

I’m looking into how to implement logging in my C# app – its a

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I’m looking into how to implement logging in my C# app – its a DLL class library. What logging frameworks are most widely used – what would give users of my DLL the most flexibility and configurability? Is there a C# equivalent of log4j?

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  1. Editorial Team

    2009 Answer: Equivalent of log4j for .NET platform is log4net and I am guessing it’s widely used.

    2019 Answer: Here are a variety of alternatives from https://github.com/quozd/awesome-dotnet/blob/master/README.md#logging:

    • Essential Diagnostics – Extends the inbuilt features of System.Diagnostics namespace to provide flexible logging
    • NLog – NLog – Advanced .NET and Silverlight logging
    • Logazmic – Open source NLog viewer for Windows
    • ELMAH – Official ELMAH site
    • Elmah MVC – Elmah for MVC
    • Logary – Logary is a high performance, multi-target logging, metric, tracing and health-check library for Mono and .NET. .NET’s answer to DropWizard. Supports many targets, built for micro-services.
    • Log4Net – The Apache log4net library is a tool to help the programmer output log statements to a variety of output targets
    • com.csutil.Log – A lightweight zero config Log wrapper that can be combined with other logging libraries like Serilog for more complex usecases.
    • Serilog – A no-nonsense logging library for the NoSQL era. Combines the best of traditional and structured diagnostic logging in an easy-to-use package.
    • StackExchange.Exceptional – Error handler used for the Stack Exchange network
    • Semantic Logging Application Block (SLAB) – Extends the inbuilt features of System.Diagnostics.Tracing namespace (EventSource class) to log to several sinks including Azure Tables, Databases, files (JSON, XML, text). Supports in-process and out-of-process logging through ETW, and Rx for real-time filtering/aggregating of events.
    • Foundatio – A fluent logging API that can be used to log messages throughout your application.
    • Exceptionless – Exceptionless .NET Client
    • Loupe – Centralized .NET logging and monitoring. [Proprietary] [Free Tier]
    • elmah.io – Cloud logging for .NET web applications using ELMAH. Find bugs before you go live. Powerful search, API, integration with Slack, GitHub, Visual Studio and more. [Free for OSS] [$]
    • BugSnag – Logs errors. Includes useful diagnostic info like stack trace, session, release, etc. Has a free tier. [Free for OSS][$]
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