NuGet · #57 most downloaded on NuGet

coverlet.collector

10.1.01.1B downloads/mocoverlet-coverage/coverlet ↗New releases in your daily digest, changelog included.

Coverlet is a cross platform code coverage library for .NET, with support for line, branch and method coverage.

Last release 10 days ago
27 Sep 2026
Release timing varies
gaps range from 3 weeks to 13 months
Nearly every release is documented
notes for 22 of 24 stable releases
Nothing withdrawn
no release was ever pulled
7 years old
24 releases · first in 2019

Release timeline

24 releases since 2019

20192020202120222023202420252026

Releases

10.1.027 Sept 20263 sources agree
Publish Microsoft.Testing.Platform coverage messages from coverlet.MTP #2019
Improvements

Publish Microsoft.Testing.Platform coverage messages from coverlet.MTP #2019

Implement dynamic exclusion filters for assemblies (Coverlet.MTP) #1946

Replace legacy .sln files with modern .slnx format #1966

coverlet.console: add trace diagnostics and actionable warnings for instrumentation/hit/empty-result failures #2005

Relax auto-property skip logic and improve coverage for records #1941

Fixed

Fix coverlet.MTP does not collect coverage on the .NET Framework portion of a large project #1980 #1967

Fix Regression in branch coverage for lambda expressions #1938

Fix When using "is" with "or" in pattern matching, branch coverage is lower than normal #1979

Fix silent zero coverage on .NET Framework since 8.0.0 #1985 by @tobiwae

Fix Race condition between ProcessExit hit-file write and out-of-proc coverage read causes EndOfStreamException #1987 #1988 by @bkoelman

Fix Regression TypeInitializationException when targeting .NET Framework - Could not load type 'System.Collections.Concurrent.ConcurrentBag #2010

Fix use --config-file CLI arg in coverlet.MTP #2030 by alexthornton1

Fix silently empty coverage for shared-framework assemblies missing from compileLibraries #2032 by @Eljees

Diff between 10.0.1 and 10.1.0

From the same repository

coverlet-coverage/coverlet

10.0.118 May 20263 sources agree

Coverlet with MTP 2 doesn't show test coverage statistic in console #1907

Improvements

Coverlet with MTP 2 doesn't show test coverage statistic in console #1907
Avoid unnecessary testhost restarts #1912 by https://github.com/mawosoft

Fixed

Fix inconsistent paths in cobertura reports #1723
Fix when using "is" with "and" in pattern matching, branch coverage is lower than normal #1313
Fix Coverlet flagging a branch for an async functions finally block where none exists #1337
Fix Coverlet Tracker Missing CompilerGeneratedAttribute #1828

Maintenance

Add architecture docs and diagrams for all integrations #1927
Update NuGet packages and .NET SDK versions #1933

Diff between 10.0.0 and 10.0.1

Open source →

10.0.017 Apr 20263 sources agree

Unique Report Filenames (coverlet.MTP and AzDO) #1866

Improvements

Unique Report Filenames (coverlet.MTP and AzDO) #1866
Add --coverlet-file-prefix option for unique report files #1869
Introduce .NET 10 support #1823

Fixed

Fix [BUG] Wrong branch rate on IAsyncEnumerable for generic type #1836
Fix [BUG] Missing Coverage after moving to MTP #1843
Fix [BUG] No coverage reported when targeting .NET Framework with 8.0.1 #1842
Fix [BUG] Behavior changes between MTP and Legacy (msbuild) #1878
Fix [BUG] Coverlet.MTP - Unable to load coverlet.mtp.appsettings.json #1880
Fix [BUG] Coverlet.Collector produces empty report when Mediator.SourceGenerator is referenced #1718 by https://github.com/yusyd
Fix [BUG] Crash during instrumentation (Methods using LibraryImport/DllImport have no body) #1762

Maintenance

Add comprehensive async method tests and documentation for issue #1864
Replace Tmds.ExecFunction Package in coverlet.core.coverage.tests #1833
Add net9.0 and net10.0 targets #1822

Diff between 8.0.1 and 10.0.0

Open source →

8.0.117 Mar 2026

Fix [BUG] TypeInitializationException when targeting .NET Framework #1818

Fixed

Fix [BUG] TypeInitializationException when targeting .NET Framework #1818
Fix [BUG] coverlet.MTP build fails with CS0400 due to developmentDependency=true #1827

Improvements

Additional improvements needed for .NET Framework instrumentation type import #1825

Diff between 8.0.0 and 8.0.1

Open source →

Additional notes2 sources agree

Fixed

Fix [BUG] TypeInitializationException when targeting .NET Framework #1818
Fix [BUG] coverlet.MTP build fails with CS0400 due to developmentDependency=true #1827

Improvements

Additional improvements needed for .NET Framework instrumentation type import #1825

Release date 2026-02-15

Packages

Open source →

8.0.014 Feb 2026Breaking3 sources agree

Upgraded minimum required .NET SDK and runtime to .NET 8.0 LTS (Long Term Support) ( Breaking Change )

Special Thanks: A huge thank you to @Bertk for driving the majority of the work in this release! 🎉

Fixed

Fix System.CommandLine 2.0 release is available #1776
Fix Excluding From Coverage bad defaults from given example #1764
Fix branchpoint exclusion for sdk 8.0.407 #1741
Fix missing copyright information in NuGet #1794
Fix bad default values in documentation #1764 by https://github.com/cboudereau

Improvements

Coverlet MTP extension feature #1788
Generate SBOM for nuget packages #1752
Use multi targets projects for coverlet.collector, coverlet.msbuild.tasks packages #1742
Use .NET 8.0 target framework for coverlet.core and remove Newtonsoft.Json #1733
Use latest System.CommandLine version #1660
Upgraded minimum required .NET SDK and runtime to .NET 8.0 LTS (Long Term Support) (Breaking Change)
Use xunit.v3 for tests and example code

Diff between 6.0.4 and 8.0.0

Open source →

6.0.330 Dec 20243 sources agree

Fix RuntimeConfigurationReader to support self-contained builds #1705 by https://github.com/pfeigl

Fixed

Fix RuntimeConfigurationReader to support self-contained builds #1705 by https://github.com/pfeigl
Fix inconsistent filenames with UseSourceLink after .NET 8 #1679
Fix hanging tests #989
Fix coverlet instrumentation becomes slow after installing dotnet sdk 8.0.200 #1620
Fix upgrading v6.0.1 to v6.0.2 increases instrumentation time #1649
Fix Unable to instrument module - NET 8 #1631
Fix slow modules filtering process #1646 by https://github.com/BlackGad
Fix incorrect coverage await using in generic method #1490

Improvements

Cache the regex used in InstrumentationHelper #1693
Enable dotnetTool integration tests for linux #660

Diff between 6.0.2 and 6.0.3

Open source →

6.0.213 Mar 2024

Threshold-stat triggers error #1634

Fixed

Threshold-stat triggers error #1634
Fixed coverlet collector 6.0.1 requires dotnet sdk 8 #1625
Type initializer errors after updating from 6.0.0 to 6.0.1 #1629
Exception when multiple exclude-by-attribute filters specified #1624

Improvements

More concise options to specify multiple parameters in coverlet.console #1624

Diff between 6.0.1 and 6.0.2

Open source →

Additional notes2 sources agree

Fixed

Threshold-stat triggers error #1634
Fixed coverlet collector 6.0.1 requires dotnet sdk 8 #1625
Type initializer errors after updating from 6.0.0 to 6.0.1 #1629
Exception when multiple exclude-by-attribute filters specified #1624

Improvements

More concise options to specify multiple parameters in coverlet.console #1624

Release date 2024-02-19

Packages

Open source →

6.0.120 Feb 20243 sources agree

Uncovered lines in .NET 8 for inheriting records #1555

Fixed

Uncovered lines in .NET 8 for inheriting records #1555
Fix record constructors not covered when SkipAutoProps is true #1561
Fix .NET 7 Method Group branch coverage issue #1447
Fix ExcludeFromCodeCoverage does not exclude method in a partial class #1548
Fix ExcludeFromCodeCoverage does not exclude F# task #1547
Fix issues where ExcludeFromCodeCoverage ignored #1431
Fix issues with ExcludeFromCodeCoverage attribute #1484
Fix broken links in documentation #1514
Fix problem with coverage for .net5 WPF application #1221 by https://github.com/lg2de
Fix unable to instrument module for Microsoft.AspNetCore.Mvc.Razor #1459 by https://github.com/lg2de

Improvements

Extended exclude by attribute feature to work with fully qualified name #1589
Use System.CommandLine instead of McMaster.Extensions.CommandLineUtils #1474 by https://github.com/Bertk
Fix deadlog in Coverlet.Integration.Tests.BaseTest #1541 by https://github.com/Bertk
Add coverlet.msbuild.tasks unit tests #1534 by https://github.com/Bertk

Diff between 6.0.0 and 6.0.1

Open source →

6.0.021 May 2023Breaking3 sources agree

Breaking changes New parameter ExcludeAssembliesWithoutSources to control automatic assembly exclusion #1164 . The parameter InstrumentModulesWithoutL…

Fixed
-Could not write lines to file CoverletSourceRootsMapping - in use by another process #1155
-Incorrect coverage for methods returning IAsyncEnumerable in generic classes #1383
-Wrong branch coverage for async methods .NET Standard 1.x #1376
-Empty path exception in visual basic projects #775
-Align published nuget package version to github release version #1413
-Sync nuget and github release versions #1122

Improvements
-Migration of the project to .NET 6.0 #1473

Breaking changes
New parameter ExcludeAssembliesWithoutSources to control automatic assembly exclusion #1164. The parameter InstrumentModulesWithoutLocalSources has been removed. since it can be handled by setting ExcludeAssembliesWithoutSources to None.
The default heuristics for determining whether to instrument an assembly has been changed. In previous versions any missing source file was taken as a signal that it was a third-party project that shouldn't be instrumented, with exceptions for some common file name patterns for source generators. Now only assemblies where no source files at all can be found are excluded from instrumentation, and the code for detecting source generator files have been removed. To get back to the behaviour that at least one missing file is sufficient to exclude an assembly, set ExcludeAssembliesWithoutSources to MissingAny, or use assembly exclusion filters for more fine-grained control.

Diff between 3.2.0 and 6.0.0

Open source →

3.2.029 Oct 20222 sources agree

Fix TypeLoadException when referencing Microsoft.Extensions.DependencyInjection v6.0.1 #1390

Fixed

Fix TypeLoadException when referencing Microsoft.Extensions.DependencyInjection v6.0.1 #1390
Source Link for code generators fails #1322
Await foreach has wrong branch coverage when method is generic #1210
ExcludeFromCodeCoverage attribute on local functions ignores lambda expression #1302

Added

Added InstrumentModulesWithoutLocalSources setting #1360 by @TFTomSun

Release date 2022-02-06

Packages

Open source →

3.1.130 Jan 20222 sources agree

Fix wrong branch coverage with EnumeratorCancellation attribute #1275

Fixed

Fix wrong branch coverage with EnumeratorCancellation attribute #1275
Fix negative coverage exceeding int.MaxValue #1266
Fix summary output format for culture de-DE #1263
Fix branch coverage issue for finally block with await #1233
Fix threshold doesn't work when coverage empty #1205
Fix branch coverage issue for il switch #1177
Fix branch coverage with using statement and several awaits#1176
Fix CopyCoverletDataCollectorFiles to avoid to override user dlls for dotnet publish scenario #1243

Improvements

Improve logging in case of exception inside static ctor of NetstandardAwareAssemblyResolver #1230
When collecting open the hitfile with read access #1214 by https://github.com/JamesWTruher
Add CompilerGenerated attribute to the tracker #1229

Release date 2021-07-19

Packages

Open source →

3.1.019 Jul 20212 sources agree

Fix branch coverage for targetframework net472 #1167

Fixed

Fix branch coverage for targetframework net472 #1167
Fix F# projects with unknown source #1145
Fix SkipAutoProps for inline assigned properties #1139
Fix partially covered throw statement #1144
Fix coverage threshold not failing when no coverage #1115
Fix partially covered await foreach statement #1107 by https://github.com/alexthornton1
Fix System.MissingMethodException(TryGetIntArgFromDict) #1101
Fix ExcludeFromCodeCoverage on props #1114
Fix incorrect branch coverage with await using #1111 by https://github.com/alexthornton1

Added

Support deterministic reports #1113
Specifying threshold level for each threshold type #1123 by https://github.com/pbmiguel

Improvements

Implementation of Npath complexity for the OpenCover reports #1058 by https://github.com/benjaminZale

Release date 2021-02-21

Packages

Open source →

3.0.09 Jan 20212 sources agree

Attribute exclusion does not work if attribute name does not end with "Attribute" #884 by

Fixed

Attribute exclusion does not work if attribute name does not end with "Attribute" #884 by https://github.com/bddckr
Fix deterministic build+source link bug #895
Fix anonymous delegate compiler generate bug #896
Fix incorrect branch coverage with await ValueTask #949 by https://github.com/alexthornton1
Fix switch pattern coverage #1006

Added

Skip autoprops feature #912
Exclude code that follows [DoesNotReturn] from code coverage #904 by https://github.com/kevin-montrose
CoverletReport MSBuild variable containing coverage filenames #932 by https://github.com/0xced
Add Visual Studio Add-In #954 by https://github.com/FortuneN
Remove workaround for deterministic build for sdk >= 3.1.100 #965
Allow standalone coverlet usage for integration/end-to-end tests using .NET tool driver #991
Support .NET Framework(>= net461) for in-process data collectors #970

Release date 2020-05-30

Packages

Open source →

1.3.030 May 20202 sources agree

Fix for code complexity not being generated for methods for cobertura reporter #738 by

Fixed

Fix for code complexity not being generated for methods for cobertura reporter #738 by https://github.com/dannyBies
Fix coverage, skip branches in generated MoveNext() for singleton iterators #813 by https://github.com/bert2
Fix 'The process cannot access the file...because it is being used by another process' due to double flush for collectors driver #https://github.com/coverlet-coverage/coverlet/pull/835
Fix skip [ExcludefromCoverage] for generated async state machine #849

Added

Added support for deterministic build for msbuild/collectors driver #802 #796 with the help of https://github.com/clairernovotny and https://github.com/tmat

Improvements

Refactor DependencyInjection #728 by https://github.com/daveMueller

Release date 2020-04-02

Packages

Open source →

1.2.12 Apr 20202 sources agree

Fix ExcludeFromCodeCoverage attribute bugs #129 and #670 with #671 by

Fixed

Fix ExcludeFromCodeCoverage attribute bugs #129 and #670 with #671 by https://github.com/matteoerigozzi
Fix bug with nested types filtering #689
Fix Coverage Issue - New Using + Async/Await + ConfigureAwait #669
Improve branch detection for lambda functions and async/await statements #702 by https://github.com/matteoerigozzi
Improve coverage, hide compiler generated branches for try/catch blocks inside async state machine #716 by https://github.com/matteoerigozzi
Improve coverage, skip lambda cached field #753

Improvements

Trim whitespace between values when reading from configuration from runsettings #679 by https://github.com/EricStG
Code improvement, flow ILogger to InstrumentationHelper #727 by https://github.com/daveMueller
Add support for line branch coverage in OpenCover format #772 by https://github.com/costin-zaharia

Release date 2020-01-03

Packages

Open source →

1.2.03 Jan 20202 sources agree

Exclude by assembly level System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage #589

Added

Add log to tracker #553
Exclude by assembly level System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage #589
Allow coverlet integration with other MSBuild test strategies#615 by https://github.com/sharwell

Fixed

Fix and simplify async coverage #549
Improve lambda scenario coverage #583
Mitigate issue in case of failure in assembly loading by cecil #625
Fix ConfigureAwait state machine generated branches #634
Fix coverage overwritten if the project has multiple target frameworks #636
Fix cobertura Jenkins reporter + source link support #614 by https://github.com/daveMueller
Fix pdb file locking during instrumentation #656

Improvements

Improve exception message for unsupported runtime #569 by https://github.com/daveMueller
Improve cobertura absolute/relative path report generation #661 by https://github.com/daveMueller

Release date 2019-09-23

Packages

Open source →

1.1.022 Sept 20192 sources agree

Output multiple formats for vstest integration #533 by

Added

Output multiple formats for vstest integration #533 by https://github.com/daveMueller
Different exit codes to indicate particular failures #412 by https://github.com/sasivishnu

Changed

Skip instrumentation of module with embedded pdb without local sources #510, with this today xunit will be skipped in automatic way.

Fixed

Fix exclude by files #524
Changed to calculate based on the average coverage of the module #479 by https://github.com/dlplenin
Fix property attribute detection #477 by https://github.com/amweiss
Fix instrumentation serialization bug #458
Fix culture for cobertura xml report #464

Open source →

coverlet.collector

Release timeline

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Release date 2026-02-15

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Release date 2024-12-31

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Release date 2024-02-19

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Release date 2022-02-06

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Release date 2022-01-30

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Release date 2021-07-19

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Release date 2021-02-21

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Release date 2021-01-24

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Release date 2021-01-16

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Release date 2021-01-09

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Release date 2020-05-30

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Release date 2020-04-02

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Release date 2020-01-03

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Release date 2019-09-23

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