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A portable logging abstraction for .NET
C# Other
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Common.Logging .NET

Project Build Status

Build status


Provides a simple logging abstraction to switch between different logging implementations. There is current support for log4net, NLog and Enterprise Library logging.

Additionally Common.Logging comes with a set of base classes making the integration of any log system a breeze.

See also

Console Quickstart

This demonstrates how to configure your app to log using the built in Common.Logging console adapter.

1) Install Common.Logging via NuGet

Either open the Package Management Console and enter the following or use the built-in GUI

NuGet: PM> Install-Package Common.Logging

2) Register and configure Common.Logging

Then add the relevant sections to your app.config or web.config:

<?xml version="1.0" encoding="utf-8" ?>

    <sectionGroup name="common">
      <section name="logging" type="Common.Logging.ConfigurationSectionHandler, Common.Logging" />

      <factoryAdapter type="Common.Logging.Simple.ConsoleOutLoggerFactoryAdapter, Common.Logging">
        <arg key="level" value="INFO" />
        <arg key="showLogName" value="true" />
        <arg key="showDateTime" value="true" />
        <arg key="dateTimeFormat" value="yyyy/MM/dd HH:mm:ss:fff" />


NLog Quickstart

There are different packages for each major NLog version. Install the correct package for your referenced NLog version. This example installs the adapter for NLog v2.0:

PM> Install-Package Common.Logging.NLog20

If you are using NLog v3.0, you should install the Common.Logging.NLog30 package and so on.

The app config should then have a common logging section like below. Be sure to match the factoryAdapter type with your installed Common.Logging.NLogXX version.

      <factoryAdapter type="Common.Logging.NLog.NLogLoggerFactoryAdapter, Common.Logging.NLog20">
        <arg key="configType" value="INLINE" />

<nlog xmlns="" xmlns:xsi="">

Application Insights Quickstart

There are different packages for each major Application Insights version. Install the correct package for your referenced Application Insights version. This example installs the adapter for Application Insights v0.17:

PM> Install-Package Microsoft.ApplicationInsights -Version 0.17.0

The app config should then have an Application Insights section like below. Be sure to set the InstrumentationKey with your InstrumentationKey retrieved from Application Insights portal

      <factoryAdapter type="Common.Logging.ApplicationInsights.ApplicationInsightsLoggerFactoryAdapter, Common.Logging.ApplicationInsights">
        <arg key="InstrumentationKey" value="[YOUR APPLICATION INSIGHTS INSTRUMENTATION KEY]" />

See module documentation and Source Forge for other factoryAdapters and their configuration values

Solution Layout

  • bin contains the Common.Logging distribution dll files
  • doc contains reference documentation.
  • shared contains shared nant build scripts
  • modules contains the sourcecode for Common.Logging.XXXX modules
  • redist contains redistributable assemblies like log4net for your convenience

The Common Infrastructure Libraries for .NET are released under the terms of the Apache Software License (see license.txt).


  • Clone the GitHub repository
  • Install Silverlight SDK 5
  • [Optional] Install Java for the documenation builder
  • Create a strong name key. c:\netcommon>sn -k
  • Build the the solution. c:\netcommon>build-release.cmd
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