NLog 4.5.0

NLog for .NET Framework and .NET Standard

NLog is a logging platform for .NET with rich log routing and management capabilities.

There is a newer version of this package available.
See the version list below for details.
Install-Package NLog -Version 4.5.0
dotnet add package NLog --version 4.5.0
paket add NLog --version 4.5.0
The NuGet Team does not provide support for this client. Please contact its maintainers for support.

Getting started with NLog

Platform support

  • .NET Framework 3.5, 4, 4.5, 4.6 & 4.7
  • .NET Framework 4 client profile
  • Xamarin Android
  • Xamarin iOs
  • Windows Phone 8
  • Silverlight 4 and 5
  • Mono 4
  • ASP.NET 4 (NLog.Web package)
  • ASP.NET Core (NLog.Web.AspNetCore package)
  • .NET Core (NLog.Extensions.Logging package)
  • .NET Standard 1.3+
  • .NET Standard 2.x
  • UWP

See also Platform support

Troubleshooting

Getting started with NLog

Platform support

  • .NET Framework 3.5, 4, 4.5, 4.6 & 4.7
  • .NET Framework 4 client profile
  • Xamarin Android
  • Xamarin iOs
  • Windows Phone 8
  • Silverlight 4 and 5
  • Mono 4
  • ASP.NET 4 (NLog.Web package)
  • ASP.NET Core (NLog.Web.AspNetCore package)
  • .NET Core (NLog.Extensions.Logging package)
  • .NET Standard 1.3+
  • .NET Standard 2.x
  • UWP

See also Platform support

Troubleshooting

Release Notes

NLog 4.5 adds structured logging and .NET Standard support/UPW without breaking changes! Also a lot features has been added!


List of important changes in NLog 4.5

**Features:**

- Support for .Net Standard 2.0 [#2263] + [#2402] (@snakefoot)
- Support for .Net Standard 1.5 [#2341] (@snakefoot)
- Support for .Net Standard 1.3 (and UWP) [#2441] + [#2597] (Remember to manually flush on app suspend). (@snakefoot)
- Introduced Structured logging [#2208] + [#2262] + [#2244] + [#2544] (@snakefoot, @304NotModified, @jods4, @nblumhardt) - see https://github.com/NLog/NLog/wiki/How-to-use-structured-logging
- Json conversion also supports object properties [#2179],  [#2555] (@snakefoot, @304NotModified)
- event-properties layout-renderer can now render objects as json [#2241] (@snakefoot, @304NotModified)
- exception layout-renderer can now render exceptions as json [#2357] (@snakefoot)
- Default file archive logic is now easier to use [#1993] (@snakefoot)
- Introduced InstallationContext.ThrowExceptions [#2214] (@rbarillec)
- WebServiceTarget - Allow configuration of proxy address [#2375] (@snakefoot)
- WebServiceTarget - JsonPost with JsonLayout without being wrapped in parameter [#2590] (@snakefoot)
- ${guid}, added GeneratedFromLogEvent [#2226] (@snakefoot)
- TraceTarget RawWrite to always perform Trace.WriteLine independent of LogLevel [#1968] (@snakefoot)
- Adding OverflowAction options to BufferingTargetWrapper [#2276] (@mikegron)
- WhenRepeatedFilter - Filtering of identical LogEvents  [#2123] + [#2297] (@snakefoot)
- ${callsite} added CleanNamesOfAsyncContinuations option [#2292] (@tkhaugen, @304NotModified)
- ${ndlctiming} allows timing of ndlc-scopes [#2377] (@snakefoot)
- NLogViewerTarget - Enable override of the Logger-name [#2390] (@snakefoot)
- ${sequenceid} added [#2411] (@MikeFH)  
- Added "regex-matches" for filtering [#2437] (@MikeFH)
- ${gdc}, ${mdc} & {mdlc} - Support Format parameter [#2500] (@snakefoot)
- ${currentDir} added [#2491] (@UgurAldanmaz)
- ${AssemblyVersion}: add type (File, Assembly, Informational) option [#2487] (@alexangas)
- FileTarget: Support byte order mark [#2456] (@KYegres)
- TargetWithContext - Easier to create custom NLog targets with support for MDLC and NDLC [#2467] (@snakefoot)
- ${callname-filename} - Without line number [#2591] (@brunotag)
- MDC + MDLC with SetScoped property support  [#2592] (@MikeFH)
- LoggingConfiguration AddRule includes final-parameter [#2612] (@893949088)

**BugFixes:**
- Improve archive stability during concurrent file access [#1889] (@snakefoot)
- FallbackGroup could lose log events [#2265] (@frabar666)
- ${exception} - only include separator when items are available [#2257] (@jojosardez)
- LogFactory - Fixes broken EventArgs for ConfigurationChanged [#1897] (@snakefoot)
- Do not report wrapped targets as unused targets [#2290] (@thesmallbang)
- Added IIncludeContext, implemented missing properties [#2117] (@304NotModified)
- Improve logging of callsite linenumber for async-methods [#2386] (@snakefoot)
- NLogTraceListener - DisableFlush is enabled by default when AutoFlush=true [#2407] (@snakefoot)
- NLogViewer - Better defaults for connection limits [#2404] (@304NotModified)
- LoggingConfiguration.LoggingRules is not thread safe [#2393], [#2418]
- Fix XmlLoggingConfiguration reloading [#2475] (@snakefoot)
- Database Target now supports EntityFramework ConnectionStrings [#2510] (@Misiu, @snakefoot)
- LoggingConfiguration.RemoveTarget now works while actively logging [#2549] (@jojosardez, @snakefoot)
- FileTarget does not fail on platforms without global mutex support [#2604] (@snakefoot)
- LoggingConfiguration does not fail when AutoReload is not possible on the platforms without FileWatcher [#2603]  (@snakefoot)

**Performance:**
- More targets has OptimizeBufferReuse enabled by default [#1913] + [#1923] + [#1912] + [#1911] + [#1910] + [#1909] + [#1908] + [#1907] + [#2560]   (@snakefoot)
- StringBuilderPool - Improved Layout Render Performance by reusing StringBuilders [#2208]   (@snakefoot)
- JsonLayout - Improved Layout Performance, by optimizing use of StringBuilder [#2208]   (@snakefoot)
- FileTarget - Faster byte-encoding of log messsages, by using crude Encoding.GetMaxByteCount() instead of exact Encoding.GetByteCount() [#2208] (@snakefoot)
- Target - Precalculate Layout should ignore sub-layouts for complex layout (Ex Json) [#2378]  (@snakefoot)
- MessageLayoutRenderer - Skip `string.Format` allocation (for caching) when writing to a single target, instead format directly into output buffer. [#2507]  (@snakefoot)

for full list, see https://github.com/NLog/NLog/blob/master/CHANGELOG.md

for what is supported in each platform, see https://github.com/NLog/NLog/wiki/platform-support

Version History

Version Downloads Last updated
4.6.2 63,877 4/2/2019
4.6.1 18,714 3/29/2019
4.6.0 56,743 3/21/2019
4.5.11 1,323,125 11/6/2018
4.5.10 1,159,027 9/17/2018
4.5.9 384,799 8/24/2018
4.5.8 592,364 8/5/2018
4.5.7 296,648 7/19/2018
4.5.6 865,502 5/29/2018
4.5.5 204,356 5/25/2018
4.5.4 680,262 5/5/2018
4.5.3 389,039 4/16/2018
4.5.2 362,520 4/6/2018
4.5.1 83,767 4/3/2018
4.5.0 652,020 3/25/2018
4.4.13 288,636 2/27/2018
4.4.12 2,308,695 8/8/2017
4.4.11 683,479 6/17/2017
4.4.10 200,459 5/31/2017
4.4.9 450,483 5/5/2017
4.4.8 72,822 4/28/2017
4.4.7 54,169 4/25/2017
4.4.6 143,665 4/15/2017
4.4.5 224,228 3/28/2017
4.4.4 230,320 3/10/2017
4.4.3 343,663 2/17/2017
4.4.2 186,666 2/6/2017
4.4.1 524,817 12/24/2016
4.4.0 158,493 12/14/2016
4.3.11 519,584 11/7/2016
4.3.10 341,085 10/11/2016
4.3.9 278,432 9/18/2016
4.3.8 333,492 9/5/2016
4.3.7 327,637 8/6/2016
4.3.6 159,977 7/23/2016
4.3.5 488,202 6/12/2016
4.3.4 388,187 5/16/2016
4.3.3 163,041 4/28/2016
4.3.2 48,277 4/26/2016
4.3.1 65,193 4/20/2016
4.3.0 47,633 4/16/2016
4.2.3 793,044 12/20/2015
4.2.2 141,814 12/2/2015
4.2.1 94,448 11/21/2015
4.2.0 213,745 10/24/2015
4.1.2 390,565 9/20/2015
4.1.1 62,146 9/12/2015
4.1.0 107,571 8/31/2015
4.0.1 424,848 6/18/2015
4.0.0 296,901 6/9/2015
3.2.1 374,761 4/24/2015
3.2.0 763,061 1/2/2015
3.1.0 795,447 6/24/2014
3.0.0 121,873 6/2/2014
2.1.0 680,706 10/10/2013
2.0.1.2 417,444 4/8/2013
2.0.0.2000 649,188 7/18/2011
1.0.0.505 109,829 1/7/2011
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