NLog 4.5.0

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There is a newer version of this package available.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
<PackageReference Include="NLog" Version="4.5.0" />
For projects that support PackageReference, copy this XML node into the project file to reference the package.
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

NuGet packages (1.8K)

Showing the top 5 NuGet packages that depend on NLog:

Package Downloads
NLog.Extensions.Logging
NLog LoggerProvider for Microsoft.Extensions.Logging for logging in .NET Standard libraries and .NET Core applications. For ASP.NET Core, use NLog.Web.AspNetCore: https://www.nuget.org/packages/NLog.Web.AspNetCore
NLog.Config
NLog.config file to get started with configuring NLog. This package is not mandatory to get started with NLog: the configuration file can created manually (read specs here: https://github.com/NLog/NLog/wiki/Configuration-file) or the configuration can be created programmatically. (read more here: https://github.com/NLog/NLog/wiki/Configuration-API) Note: Unfortunately this package won't work well when using <PackageReference> Advised to: - download manually: https://raw.githubusercontent.com/NLog/NLog/dev/src/NuGet/NLog.Config/content/NLog.config - set "Copy To Output Directory" to "Copy if newer"
Microsoft.ApplicationInsights.NLogTarget
Application Insights NLog Target is a custom target allowing you to send NLog log messages to Application Insights. Application Insights will collect your logs from multiple sources and provide rich powerful search capabilities. Privacy statement: https://go.microsoft.com/fwlink/?LinkId=512156
NLog.Web
NLog logging for ASP.NET and ASP.NET MVC. Includes targets and layout renderers for websites and web applications. This package is for ASP.NET 3.5+ For ASP.NET Core: Check https://www.nuget.org/packages/NLog.Web.AspNetCore
NLog.Extended
NLog.Extended.dll provides MSMQ target and AppSetting renderer

GitHub repositories (233)

Showing the top 5 popular GitHub repositories that depend on NLog:

Repository Stars
shadowsocks/shadowsocks-windows
If you want to keep a secret, you must also hide it from yourself.
Wox-launcher/Wox
Launcher for Windows, an alternative to Alfred and Launchy.
JustArchiNET/ArchiSteamFarm
C# application with primary purpose of idling Steam cards from multiple accounts simultaneously.
Sonarr/Sonarr
Smart PVR for newsgroup and bittorrent users.
Jackett/Jackett
API Support for your favorite torrent trackers

Version History

Version Downloads Last updated
4.7.5 437,205 9/27/2020
4.7.4 682,739 8/22/2020
4.7.3 366,739 7/31/2020
4.7.2 2,089,482 5/18/2020
4.7.1 46,941 5/15/2020
4.7.0 1,689,352 3/20/2020
4.6.8 5,609,637 11/4/2019
4.6.7 4,746,581 8/25/2019
4.6.6 1,492,208 7/14/2019
4.6.5 1,890,136 6/14/2019
4.6.4 1,504,204 5/28/2019
4.6.3 1,305,328 4/30/2019
4.6.2 1,013,088 4/2/2019
4.6.1 137,312 3/29/2019
4.6.0 441,958 3/21/2019
4.5.11 6,443,140 11/6/2018
4.5.10 3,296,127 9/17/2018
4.5.9 941,669 8/24/2018
4.5.8 1,320,887 8/5/2018
4.5.7 704,716 7/19/2018
4.5.6 1,897,317 5/29/2018
4.5.5 471,626 5/25/2018
4.5.4 1,599,890 5/5/2018
4.5.3 910,843 4/16/2018
4.5.2 664,411 4/6/2018
4.5.1 201,125 4/3/2018
4.5.0 2,693,436 3/25/2018
4.4.13 536,825 2/27/2018
4.4.12 4,369,389 8/8/2017
4.4.11 1,110,778 6/17/2017
4.4.10 284,830 5/31/2017
4.4.9 748,167 5/5/2017
4.4.8 114,748 4/28/2017
4.4.7 87,754 4/25/2017
4.4.6 246,010 4/15/2017
4.4.5 342,745 3/28/2017
4.4.4 403,171 3/10/2017
4.4.3 556,311 2/17/2017
4.4.2 290,093 2/6/2017
4.4.1 836,748 12/24/2016
4.4.0 230,107 12/14/2016
4.3.11 773,176 11/7/2016
4.3.10 513,205 10/11/2016
4.3.9 385,144 9/18/2016
4.3.8 498,786 9/5/2016
4.3.7 465,922 8/6/2016
4.3.6 215,387 7/23/2016
4.3.5 691,728 6/12/2016
4.3.4 588,830 5/16/2016
4.3.3 285,928 4/28/2016
4.3.2 73,135 4/26/2016
4.3.1 90,488 4/20/2016
4.3.0 99,341 4/16/2016
4.2.3 1,168,506 12/20/2015
4.2.2 223,806 12/2/2015
4.2.1 207,873 11/21/2015
4.2.0 315,827 10/24/2015
4.1.2 564,435 9/20/2015
4.1.1 111,249 9/12/2015
4.1.0 157,833 8/31/2015
4.0.1 587,008 6/18/2015
4.0.0 607,452 6/9/2015
3.2.1 625,916 4/24/2015
3.2.0 1,099,839 1/2/2015
3.1.0 1,131,271 6/24/2014
3.0.0 176,692 6/2/2014
2.1.0 987,909 10/10/2013
2.0.1.2 615,409 4/8/2013
2.0.0.2000 1,030,251 7/18/2011
1.0.0.505 210,420 1/7/2011
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