Method not found: 'Microsoft.CodeCoverage.Core.Configurations.DataCollectorConfiguration Microsoft.CodeCoverage.Core.Configurations.ConfigurationFileUtility.GetConfiguration(System.Xml.XmlElement, Microsoft.CodeCoverage.Core.ILogger)

[MarkVecozo]

Describe the bug

We are updating some packages, and the upgrade for MsTest seems to break some tests in Azure Pipelines:

`Data collector 'Code Coverage' message: Data collector 'Code Coverage' threw an exception during type loading, construction, or initialization: System.MissingMethodException: Method not found: 'Microsoft.CodeCoverage.Core.Configurations.DataCollectorConfiguration Microsoft.CodeCoverage.Core.Configurations.ConfigurationFileUtility.GetConfiguration(System.Xml.XmlElement, Microsoft.CodeCoverage.Core.ILogger)'

Steps To Reproduce

Update MsTest package to v3.8.0 or beyond.
(It seems in this version the CodeCoverage is now a dependency of MSTest metapackage)

WIth .NET472 test projects there is no problem, with .NET8 test projects, we see this error in Azure Pipelines.

Expected behavior

Tests are run and succeed with no errors.

Actual behavior

Test are run and succeed, after we get an error on the Code Coverage.

Additional context

Command line:
D:\a\_tool\dotnet\dotnet.exe test D:\a\29\s\Project\Project.CITest\Project.CITest.csproj --logger trx --results-directory D:\a\_temp --configuration Release --arch x64 --logger trx --settings Project\default.runsettings

Stacktrace;
Data collector 'Code Coverage' message: Data collector 'Code Coverage' threw an exception during type loading, construction, or initialization: System.MissingMethodException: Method not found: 'Microsoft.CodeCoverage.Core.Configurations.DataCollectorConfiguration Microsoft.CodeCoverage.Core.Configurations.ConfigurationFileUtility.GetConfiguration(System.Xml.XmlElement, Microsoft.CodeCoverage.Core.ILogger)'. at Microsoft.VisualStudio.Coverage.DynamicCoverageDataCollector.OnInitialize(XmlElement configurationElement) at Microsoft.VisualStudio.TraceCollector.BaseDataCollector.Initialize(XmlElement configurationElement, IDataCollectionEvents events, IDataCollectionSink dataSink, IDataCollectionLogger logger, IDataCollectionAgentContext agentContext) at Microsoft.VisualStudio.TraceCollector.BaseDataCollector.Initialize(XmlElement configurationElement, DataCollectionEvents events, DataCollectionSink dataSink, DataCollectionLogger logger, DataCollectionEnvironmentContext environmentContext) at Microsoft.VisualStudio.TestPlatform.Common.DataCollector.DataCollectorInformation.InitializeDataCollector(ITelemetryReporter telemetryReporter) in /_/src/Microsoft.TestPlatform.Common/DataCollection/DataCollectorInformation.cs:line 115 at Microsoft.VisualStudio.TestPlatform.Common.DataCollector.DataCollectionManager.LoadAndInitialize(DataCollectorSettings dataCollectorSettings, String settingsXml) in /_/src/Microsoft.TestPlatform.Common/DataCollection/DataCollectionManager.cs:line 537.. Results File: D:\a\_temp\AzDevOps_agent0009TN_2025-10-07_10_45_14.trx

[Youssef1313]

Thanks for reporting this @MarkVecozo. I transferred this to codecoverage repo.

[fhnaseer]

@MarkVecozo Can you please provide a minimal repro project for this?

[MarkVecozo]

Hey @fhnaseer,

I tried to recreate the problem in a fresh solution but couldn't reproduce it.

So, I tried to reproduce and fix the error in the solution we were having a problem with.
When I remove the --settings Project\default.runsettings the tests run locally.

I think the problem is that we have this in our default.runsettings:

<DataCollector friendlyName="Code Coverage" uri="datacollector://Microsoft/CodeCoverage/2.0" assemblyQualifiedName="Microsoft.VisualStudio.Coverage.DynamicCoverageDataCollector, Microsoft.VisualStudio.TraceCollector, Version=11.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a">

That (I think) we got from here:
https://learn.microsoft.com/en-us/visualstudio/test/customizing-code-coverage-analysis?view=vs-2022

I am not entirely sure if dotnet test is supposed to have a runsettings file?

We are using the DotNetCoreCLI@2 task in our pipeline:
https://learn.microsoft.com/nl-nl/azure/devops/pipelines/tasks/reference/dotnet-core-cli-v2?view=azure-pipelines

And use the runsettings file with: --settings "runsettingsFilePath"

[fhnaseer]

Update MsTest package to v3.8.0 or beyond.
(It seems in this version the CodeCoverage is now a dependency of MSTest metapackage)

Most probably the code coverage libs shipped by MSTest package are different version than the one used by dotnet test. And these are not compatible with each other.

I think the problem is that we have this in our default.runsettings:

Please remove this from the runsettings file and call dotnet test --collect "Code Coverage" --settings "runsettingsFilePath"

[MarkVecozo]

Unfortunately I wasn't able to get it working with the default runsettings and the dotnet test command.

I was able to reproduce it: CodeCoverageIssue
(This is my first time uploading a sample repo, if you have any tips / suggestions please let me know).

I am not sure why, but I needed a referenced project with a reference to Microsoft.ApplicationInsights.AspNetCore package.

I hope this helps, I will continue to try to get it working with the --collect "Code Coverage" setting