NLog is a free logging platform for .NET with rich log routing and management capabilities. It makes it easy to produce and manage high-quality logs for your application regardless of its size or complexity.

It can process diagnostic messages emitted from any .NET language, augment them with contextual information, format them according to your preference and send them to one or more targets such as file or database. .NET, C/C++ and COM interop APIs are supported so that all your application components including legacy modules written in C++/COM can route their log messages through a common engine.

NLog is open source software, licensed under the terms of BSD license.

Recent Project News and Blog Posts

• 2009-11-07 Creating multiple log files from a File target
• 2009-11-01 Gibraltar adapter for NLog released
• 2009-10-19 NLog 2 backwards compatibility and breaking change policy
• 2009-10-14 NLog Blog has been launched
• 2009-09-07 NLog 1.0 Refresh has been released

• Files - single file or multiple, with automatic file naming and archival
• Event Log - local or remote
• Database - store your logs in databases supported by .NET
• Network - using TCP, UDP, SOAP, MSMQ protocols
• Command-line console - including color coding of messages
• E-mail - you can receive emails whenever application errors occur
• ASP.NET trace
• ... and many more

• very easy to configure, both through configuration file and programmatically
• easy-to-use logger pattern known from log4xxx
• advanced routing using buffering, asynchronous logging, load balancing, failover, and more
• cross-platform support: .NET Framework, .NET Compact Framework and Mono (on Windows and Unix)
• multiple APIs: .NET, COM, C/C++