log4net
The Apache log4net library is a library to output log statements to a variety of output targets.
Features
Below, we share some highlights from log4net Features.
- Ready-to-Use
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log4net includes a wide range of built-in modules for common and advanced use cases. 
- Reliability
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log4net is built with solid reliability in mind. It can automatically reload its configuration upon modification and will do so without losing log events while reconfiguration occurs. 
- Performance
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When configured correctly, log4net can deliver excelling performance without sacrificing reliability.