Could not load file or assembly 'Microsoft.CodeAnalysis, Version=4.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'. The system cannot find the file specified.

We are facing this error

 Could not load file or assembly 'Microsoft.CodeAnalysis, Version=4.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'. The system cannot find the file specified.
   at System.Reflection.RuntimeModule.GetTypes(RuntimeModule module)
   at System.Reflection.Assembly.GetTypes()
   at Microsoft.CodeAnalysis.Tools.Analyzers.AnalyzerFinderHelpers.<>c.<LoadAnalyzersAndFixers>b__0_0(Assembly assembly)
   at System.Linq.Enumerable.SelectManySingleSelectorIterator`2.MoveNext()
   at System.Linq.Enumerable.WhereSelectEnumerableIterator`2.MoveNext()
   at System.Linq.Enumerable.OfTypeIterator[TResult](IEnumerable source)+MoveNext()
   at System.Collections.Generic.LargeArrayBuilder`1.AddRange(IEnumerable`1 items)
   at System.Collections.Generic.EnumerableHelpers.ToArray[T](IEnumerable`1 source)
   at System.Collections.Immutable.ImmutableArray.CreateRange[T](IEnumerable`1 items)
   at Microsoft.CodeAnalysis.Tools.Analyzers.AnalyzerFinderHelpers.LoadAnalyzersAndFixers(IEnumerable`1 assemblies)
   at Microsoft.CodeAnalysis.Tools.Analyzers.AnalyzerReferenceInformationProvider.GetAnalyzersAndFixers(Project project)
   at System.Collections.Immutable.ImmutableDictionary.<>c__DisplayClass9_0`3.<ToImmutableDictionary>b__0(TSource element)
   at System.Linq.Utilities.<>c__DisplayClass2_0`3.<CombineSelectors>b__0(TSource x)
   at System.Linq.Enumerable.SelectIListIterator`2.MoveNext()
   at System.Collections.Immutable.ImmutableDictionary`2.AddRange(IEnumerable`1 items, MutationInput origin, KeyCollisionBehavior collisionBehavior)
   at System.Collections.Immutable.ImmutableDictionary`2.AddRange(IEnumerable`1 pairs, Boolean avoidToHashMap)
   at System.Collections.Immutable.ImmutableDictionary`2.AddRange(IEnumerable`1 pairs)
   at System.Collections.Immutable.ImmutableDictionary.ToImmutableDictionary[TSource,TKey,TValue](IEnumerable`1 source, Func`2 keySelector, Func`2 elementSelector, IEqualityComparer`1 keyComparer, IEqualityComparer`1 valueComparer)
   at System.Collections.Immutable.ImmutableDictionary.ToImmutableDictionary[TSource,TKey,TValue](IEnumerable`1 source, Func`2 keySelector, Func`2 elementSelector)
   at Microsoft.CodeAnalysis.Tools.Analyzers.AnalyzerReferenceInformationProvider.GetAnalyzersAndFixers(Solution solution, FormatOptions formatOptions, ILogger logger)
   at Microsoft.CodeAnalysis.Tools.Analyzers.AnalyzerFormatter.FormatAsync(Solution solution, ImmutableArray`1 formattableDocuments, FormatOptions formatOptions, ILogger logger, List`1 formattedFiles, CancellationToken cancellationToken)
   at Microsoft.CodeAnalysis.Tools.CodeFormatter.RunCodeFormattersAsync(Solution solution, ImmutableArray`1 formattableDocuments, FormatOptions formatOptions, ILogger logger, List`1 formattedFiles, CancellationToken cancellationToken)
   at Microsoft.CodeAnalysis.Tools.CodeFormatter.FormatWorkspaceAsync(FormatOptions formatOptions, ILogger logger, CancellationToken cancellationToken, String binaryLogPath)
   at Microsoft.CodeAnalysis.Tools.FormatCommandCommon.FormatAsync(FormatOptions formatOptions, ILogger`1 logger, CancellationToken cancellationToken)
   at Microsoft.CodeAnalysis.Tools.Commands.RootFormatCommand.FormatCommandDefaultHandler.InvokeAsync(InvocationContext context)
   at System.CommandLine.Invocation.InvocationPipeline.<>c__DisplayClass4_0.<<BuildInvocationChain>b__0>d.MoveNext()
--- End of stack trace from previous location ---
   at System.CommandLine.CommandLineBuilderExtensions.<>c__DisplayClass16_0.<<UseParseErrorReporting>b__0>d.MoveNext()
--- End of stack trace from previous location ---
   at System.CommandLine.CommandLineBuilderExtensions.<>c__DisplayClass11_0.<<UseHelp>b__0>d.MoveNext()
--- End of stack trace from previous location ---
   at System.CommandLine.CommandLineBuilderExtensions.<>c__DisplayClass21_0.<<UseVersionOption>b__0>d.MoveNext()
--- End of stack trace from previous location ---
   at System.CommandLine.CommandLineBuilderExtensions.<>c__DisplayClass18_0.<<UseTypoCorrections>b__0>d.MoveNext()
--- End of stack trace from previous location ---
   at System.CommandLine.CommandLineBuilderExtensions.<>c.<<UseSuggestDirective>b__17_0>d.MoveNext()
--- End of stack trace from previous location ---
   at System.CommandLine.CommandLineBuilderExtensions.<>c__DisplayClass15_0.<<UseParseDirective>b__0>d.MoveNext()
--- End of stack trace from previous location ---
   at System.CommandLine.CommandLineBuilderExtensions.<>c.<<RegisterWithDotnetSuggest>b__4_0>d.MoveNext()
--- End of stack trace from previous location ---
   at System.CommandLine.CommandLineBuilderExtensions.<>c__DisplayClass7_0.<<UseExceptionHandler>b__0>d.MoveNext() 

This is the project specification.

   <Project Sdk="Microsoft.NET.Sdk">
    <PropertyGroup>
      <TargetFramework>net6.0</TargetFramework>
      <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
     <EnforceCodeStyleInBuild>true</EnforceCodeStyleInBuild>
    <IsPackable>false</IsPackable>
  </PropertyGroup>
 </Project>

And here is the pipeline detail

 - task: UseDotNet@2
            displayName: Install .NET 6.0 SDK
            inputs:
              packageType: 'sdk'
              version: 6.0.x
      - task: CmdLine@2
            displayName: Verify code formatting
            inputs:
              script: |
                dotnet format ./src/Project.sln  --verify-no-changes --severity error --no-restore
              failOnStderr: true

The dotnet runtime version is ‘7.0.3’. The dotnet CLI version is ‘7.0.201’.

Everything was fine before we upgraded dotnet to version 7.0. While getting the error locally, the pipeline fails as well.

Can the reason be the same as https://github.com/dotnet/format/issues/1800?

[MarkusRodler]

I have the same error but I think it is the same one as last year: https://github.com/dotnet/format/issues/1519 Infos:

• EnforceCodeStyleInBuild is not set
• I am using dotnet format
• The dotnet runtime version is ‘7.0.4’
• The dotnet CLI version is ‘7.0.202’
• I have a library-project including Microsoft.CodeAnalysis.CSharp 4.5.0. If I lower it to 4.4.0 than there is no error.

[koenigst]

We have the same issue after migrating from dotnet SDK 7.0.102 to 7.0.201.

To fix it we can change the SDK version back to 7.0.1xx in the global.json or set <EnforceCodeStyleInBuild>false</EnforceCodeStyleInBuild> in our projects.