Microsoft.CodeAnalysis build error

Open

#136 opened on Jun 20, 2025 5 comments 0 reactions 0 assignees View on GitHub

Nobody has claimed this yet.

Assessment

Difficulty: 4/5
Estimated time: 3-5 days
Newbie friendliness: 35/100

Issue type: Bug
Clarity: Mostly clear
Activity status: Stale
Tech stack: csharp
Domain: build-system, tooling

Research direction

Reproduce the failure with dotnet build -c Release, then inspect Directory.Packages.props, Directory.Build.props, and Foo.CodeAnalysis.csproj alongside the Microsoft.MSBuildCache.SharedCompilation targets named in the error. Trace the Microsoft.CodeAnalysis version mismatch and verify that the affected project builds successfully without the ResolveFileAccesses assembly-load failure.

Written by the indexing model from the issue text.

Description

When testing out MSBuildCache on my solution, I am getting a build error related to Microsoft.CodeAnalysis 3.8.00, from one of our projects that itself references a difference Microsoft.CodeAnalysis version:

https://github.com/microsoft/MSBuildCache/blob/main/Directory.Packages.props#L29 references <PackageVersion Include="Microsoft.CodeAnalysis" Version="3.8.0" /> so it appears they are clashing?

NB I'm using dotnet build here - is it unsupported and I need a VS Install?

dotnet build -c Release

C:\Users\<snip>\.nuget\packages\microsoft.msbuildcache.sharedcompilation\0.1.318-preview\build\Microsoft.MSBuildCache.Shared
Compilation.targets(9,5): error MSB4018: The "ResolveFileAccesses" task failed unexpectedly. [C:\src\Foo\src\CodeAnalysis\src
\Foo.CodeAnalysis\Foo.CodeAnalysis.csproj]
C:\Users\<snip>\.nuget\packages\microsoft.msbuildcache.sharedcompilation\0.1.318-preview\build\Microsoft.MSBuildCache.Shared
Compilation.targets(9,5): error MSB4018: System.IO.FileNotFoundException: Could not load file or assembly 'Microsoft.CodeAnalysis, V
ersion=3.8.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'. The system cannot find the file specified. [C:\src\Foo\src
\CodeAnalysis\src\Foo.CodeAnalysis\Foo.CodeAnalysis.csproj]

Foo.CodeAnalysis.csproj

    ...
   <ItemGroup>
        <PackageReference Include="Microsoft.CodeAnalysis.Analyzers" />
        <PackageReference Include="Microsoft.CodeAnalysis.CSharp" />
        <PackageReference Include="NETStandard.Library" />
    </ItemGroup>
    ...

Directory.Build.props

  <ItemGroup Condition="'$(MSBuildProjectName)'!='Foo.CodeAnalysis' AND '$(MSBuildProjectName)'!='Foo.CodeAnalysis.Test'">
    <ProjectReference Include="$(MSBuildThisFileDirectory)\CodeAnalysis\src\Foo.CodeAnalysis\Foo.CodeAnalysis.csproj"
                      PrivateAssets="all"
                      ReferenceOutputAssembly="false"
                      OutputItemType="Analyzer"/>
  </ItemGroup>

Directory.Packages.props

   ...
  <ItemGroup >
    <GlobalPackageReference Include="Microsoft.MSBuildCache.SharedCompilation" Version="0.1.318-preview" />
    <GlobalPackageReference Include="Microsoft.MSBuildCache.Local" Version="0.1.318-preview" />
  </ItemGroup>
   ...
    <PackageVersion Include="Microsoft.CodeAnalysis.BannedApiAnalyzers" Version="3.3.4" />
    <PackageVersion Include="Microsoft.CodeAnalysis.Common" Version="4.0.1" />
    <PackageVersion Include="Microsoft.CodeAnalysis.CSharp" Version="4.0.1" />
    <PackageVersion Include="Microsoft.CodeAnalysis.CSharp.Features" Version="4.0.1" />
    <PackageVersion Include="Microsoft.CodeAnalysis.CSharp.Scripting" Version="4.0.1" />
    <PackageVersion Include="Microsoft.CodeAnalysis.CSharp.Workspaces" Version="4.0.1" />
    <PackageVersion Include="Microsoft.CodeAnalysis.CSharp.Analyzer.Testing.NUnit" Version="1.1.1" />
    <PackageVersion Include="Microsoft.CodeAnalysis.CSharp.CodeFix.Testing.NUnit" Version="1.1.1" />
    <PackageVersion Include="Microsoft.CodeAnalysis.CSharp.CodeFix.Testing" Version="1.1.1" />
    <PackageVersion Include="Microsoft.CodeAnalysis.CSharp.SourceGenerators.Testing" Version="1.1.1" />
    <PackageVersion Include="Microsoft.CodeAnalysis.Features" Version="4.0.1" />
    <PackageVersion Include="Microsoft.CodeAnalysis.NetAnalyzers" Version="8.0.0" />
    <PackageVersion Include="Microsoft.CodeAnalysis.Scripting.Common" Version="4.0.1" />
    <PackageVersion Include="Microsoft.CodeAnalysis.Workspaces.Common" Version="4.0.1" />
...

Dominant language: C#
Stars: 64
Forks: 24
Avg merge: 1d 14h
Merged PRs (30d): 2

Contributor guide

Open the contributing guide

First steps

Read the whole issue, then the project's contributing guide.
Comment on the issue to say you are picking it up — it saves two people doing the same work.
Fork the repository and make your change on a branch.
Open a pull request that references the issue number.

Similar issues

Add Cake DSL examples to BuildSystem and CI provider APIs Open

Documentation

Difficulty 2/5 1-3 hours Newbie friendliness 75/100

cake-build/cake#5024 · Opened Sep 23, 2026
Gå gjennom ESLint-suppressions Open

Frontend status/draft TechnicalDebt

Difficulty 2/5 1-2 days Newbie friendliness 75/100

Altinn/altinn-auth#4143 · Opened Sep 23, 2026
Flaky: msbuild integration test times out flushing at process exit (net9.0, Windows) Open

.NET Flaky Test Testing Tests

Difficulty 2/5 1-3 hours Newbie friendliness 84/100

getsentry/sentry-dotnet#5617 · 1 comment · Opened Sep 23, 2026
Add more to the documentation Open

:watch: Not Triaged dotnet-fsharp/svc

Difficulty 1/5 Under an hour Newbie friendliness 90/100

dotnet/docs#56209 · Opened Sep 22, 2026
WebPubSubServiceClient.GetClientAccessUri (sync) drops the groups argument on the TokenCredential path Open

Client customer-reported needs-team-attention question Service Attention WebPubSub

Difficulty 2/5 1-3 hours Newbie friendliness 76/100

Azure/azure-sdk-for-net#63292 · 3 comments · 1 reaction · Opened Sep 22, 2026

More C# issues