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Apache log4net


log4net is a tool to help the programmer output log statements to a variety of output targets. In case of problems with an application, it is helpful to enable logging so that the problem can be located. With log4net it is possible to enable logging at runtime without modifying the application binary. The log4net package is designed so that log statements can remain in shipped code without incurring a high performance cost. It follows that the speed of logging (or rather not logging) is crucial.

At the same time, log output can be so voluminous that it quickly becomes overwhelming. One of the distinctive features of log4net is the notion of hierarchical loggers. Using these loggers it is possible to selectively control which log statements are output at arbitrary granularity.

log4net is designed with two distinct goals in mind: speed and flexibility

To install Apache log4net, run the following command in the Package Manager Console

Install-Package log4net -Version 2.0.8



The Apache Software Foundation


Copyright 2004-2017 The Apache Software Foundation



Version History

Version Downloads Last updated
Apache log4net 2.0.8 (this version) 641,839 Saturday, March 11, 2017
Apache log4net 2.0.7 489,363 Thursday, January 5, 2017
Apache log4net 2.0.6 84,282 Sunday, December 25, 2016
log4net [1.2.15] 2.0.5 2,580,544 Thursday, December 10, 2015
log4net [1.2.14] 2.0.4 220,958 Thursday, November 12, 2015
log4net [1.2.13] 2.0.3 3,236,365 Saturday, November 23, 2013
log4net [1.2.12] 2.0.2 202,705 Saturday, October 5, 2013
log4net [1.2.12] 2.0.1 95,800 Thursday, September 19, 2013
log4net [1.2.11] 2.0.0 1,117,618 Thursday, February 16, 2012
log4net 1.2.10 1,078,783 Friday, January 7, 2011