Я использую PostSharp, и это работало нормально. Недавно мы обновили некоторые проекты до версии MVC 5.2. Сегодня я загрузил старый проект, который использовал версию 4.0 MVC. PostSharp начал сообщать о странной ошибке при сборке:

Error   17  Unhandled exception (3.1.42.0, 32 bit, CLR 4.5, Release): PostSharp.Sdk.CodeModel.AssemblyLoadException: Cannot find assembly 'system.web.mvc, version=3.0.0.0, culture=neutral, publickeytoken=31bf3856ad364e35'. [Version mismatch]
============ PostSharp Assembly Loading Log ===================
LOG: Finding the assembly with binding identity 'system.web.mvc, version=3.0.0.0, culture=neutral, publickeytoken=31bf3856ad364e35'.
LOG: Found file 'C:\Program Files (x86)\Microsoft ASP.NET\ASP.NET MVC 4\Assemblies\System.Web.Mvc.dll' with identity 'system.web.mvc, version=4.0.0.0, culture=neutral, publickeytoken=31bf3856ad364e35, processorarchitecture=msil'.
LOG: Reference mismatch for 'C:\Program Files (x86)\Microsoft ASP.NET\ASP.NET MVC 4\Assemblies\System.Web.Mvc.dll' [VersionMismatch].
LOG: Probing location 'C:\ProgramData\PostSharp\3.1.42\bin.Release\System.Web.Mvc.exe' because this directory was explicitly added to the search path [File Not Found].
LOG: Probing location 'C:\ProgramData\PostSharp\3.1.42\bin.Release\System.Web.Mvc.dll' because this directory was explicitly added to the search path [File Not Found].
LOG: Probing location 'C:\ProgramData\PostSharp\3.1.42\bin.Release\System.Web.Mvc.winmd' because this directory was explicitly added to the search path [File Not Found].
LOG: Probing location 'C:\Work\Work\CodeBase\C#\CS\+Frameworks\v5\BusinessLogic_CS_v5\bin\Debug\System.Web.Mvc.exe' because this directory was explicitly added to the search path [File Not Found].
LOG: Probing location 'C:\Work\Work\CodeBase\C#\CS\+Frameworks\v5\BusinessLogic_CS_v5\bin\Debug\System.Web.Mvc.dll' because this directory was explicitly added to the search path [File Not Found].
LOG: Probing location 'C:\Work\Work\CodeBase\C#\CS\+Frameworks\v5\BusinessLogic_CS_v5\bin\Debug\System.Web.Mvc.winmd' because this directory was explicitly added to the search path [File Not Found].
LOG: Probing location 'C:\Work\Work\CodeBase\C#\CS\+Frameworks\v5\BusinessLogic_CS_v5\obj\Debug\System.Web.Mvc.exe' because this directory was explicitly added to the search path [File Not Found].
LOG: Probing location 'C:\Work\Work\CodeBase\C#\CS\+Frameworks\v5\BusinessLogic_CS_v5\obj\Debug\System.Web.Mvc.dll' because this directory was explicitly added to the search path [File Not Found].
LOG: Probing location 'C:\Work\Work\CodeBase\C#\CS\+Frameworks\v5\BusinessLogic_CS_v5\obj\Debug\System.Web.Mvc.winmd' because this directory was explicitly added to the search path [File Not Found].
LOG: Probing location 'C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5.1\System.Web.Mvc.exe' because this directory was explicitly added to the search path [File Not Found].
LOG: Probing location 'C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5.1\System.Web.Mvc.dll' because this directory was explicitly added to the search path [File Not Found].
LOG: Probing location 'C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5.1\System.Web.Mvc.winmd' because this directory was explicitly added to the search path [File Not Found].
LOG: Probing location 'C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5.1\Facades\System.Web.Mvc.exe' because this directory was explicitly added to the search path [File Not Found].
LOG: Probing location 'C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5.1\Facades\System.Web.Mvc.dll' because this directory was explicitly added to the search path [File Not Found].
LOG: Probing location 'C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.5.1\Facades\System.Web.Mvc.winmd' because this directory was explicitly added to the search path [File Not Found].
LOG: Looking in GAC for System.Web.Mvc, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=x86.
LOG: Looking in GAC for System.Web.Mvc, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=msil.
LOG: Looking in GAC for System.Web.Mvc, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35.
LOG: The assembly 'system.web.mvc, version=3.0.0.0, culture=neutral, publickeytoken=31bf3856ad364e35' was not found.
===============================================================
   at PostSharp.Sdk.CodeModel.Domain.GetAssembly(IAssemblyName assemblyName, BindingOptions bindingOptions)
   at PostSharp.Sdk.CodeModel.AssemblyRefDeclaration.^5YpB0scd(BindingOptions _0)
   at PostSharp.Sdk.CodeModel.AssemblyRefDeclaration.GetAssemblyEnvelope(BindingOptions bindingOptions)
   at PostSharp.Sdk.CodeModel.TypeRefDeclaration.GetTypeDefinition(BindingOptions bindingOptions)
   at PostSharp.Sdk.CodeModel.TypeRefDeclaration.GetTypeDefinition()
   at PostSharp.Sdk.CodeModel.CompareExtensions.DefinitionMatchesReference(INamedType definition, INamedType reference, BindingOptions options)
   at PostSharp.Sdk.CodeModel.TypeRefDeclaration.^A9yFoe2uB3TC(ITypeSignature _0, BindingOptions _1)
   at PostSharp.Sdk.CodeModel.CompareExtensions.DefinitionMatchesReference(IMethodSignature definition, IMethodSignature reference, BindingOptions options)
   at PostSharp.Sdk.CodeModel.Binding.MethodSignatureComparer.Equals(IMethodSignature x, IMethodSignature y)
   at System.Collections.Generic.Dictionary`2.FindEntry(TKey key)
   at System.Collections.Generic.Dictionary`2.TryGetValue(TKey key, TValue& value)
   at ^/vWxD3eYDOIx.^wdkNIZCy[??0](^/fRRnkiTvxqu _0, ??0 _1, ^EyL1LQX01Ck8 _2, ^0RC0kpHqS6Uy _3, Dictionary`2 _4, Int32 _5, Int32 _6)
   at PostSharp.Sdk.Binary.ModuleWriter.SetMemberSignatureIndex(MemberRefDeclaration _0, ^EyL1LQX01Ck8 _1, ^0RC0kpHqS6Uy _2)
   at PostSharp.Sdk.Binary.ModuleWriter.WriteMemberRef(MemberRefDeclaration _0, MetadataToken _1)
   at PostSharp.Sdk.Binary.ModuleWriter.GetMappedDeclarationToken(MetadataDeclaration _0)
   at PostSharp.Sdk.Binary.ModuleWriter.SetMappedMetadataToken(MetadataDeclaration _0, UInt32* _1)
   at ^R00FfLNj7vE0.^rk33N/hO(OpCodeNumber _0, MetadataDeclaration _1)
   at ^R00FfLNj7vE0.EmitInstructionMethod(OpCodeNumber _0, IMethod _1)
   at PostSharp.Sdk.CodeModel.Instruction.Write(BaseInstructionWriter writer, InstructionPrefixes allowedPrefixes)
   at ^zpGNRK5nUM9z.^x98p/iJs13L+(InstructionReader _0)
   at PostSharp.Sdk.CodeModel.MethodBodyDeclaration.^uPrQJ6gs(InstructionBlock _0, IMethodBodyVisitor[] _1, MethodBodyVisitLevel _2, InstructionAction _3, InstructionReader _4, InstructionBlockExceptionHandlingKind _5)
   at ^zpGNRK5nUM9z.^e2BtLyuT(^Kh85h0nXrulm& _0, Int32& _1)
   at ^zpGNRK5nUM9z.^SkiT(BufferWriter _0)
   at PostSharp.Sdk.Binary.ModuleWriter.WriteMethodBodies(BufferWriter _0, UInt32 _1)
   at ^Up6wxUIUnN6a.^VfvrABjR()
   at ^Up6wxUIUnN6a.^SkiT()
   at ^cyC/TYSlPGB/.^wvPm(^RtksFin57NJ8 _0, ^8gP93Xsl\+Imn _1)
   at PostSharp.Sdk.Extensibility.Tasks.CompileTask.Execute()
   at PostSharp.Sdk.Extensibility.Project.ExecutePhase(String phase)
   at PostSharp.Sdk.Extensibility.Project.Execute()
   at PostSharp.Hosting.PostSharpObject.ExecuteProjects()
   at PostSharp.Hosting.PostSharpObject.InvokeProject(ProjectInvocation projectInvocation). C:\Work\Work\CodeBase\C#\CS\+Frameworks\v5\BusinessLogic_CS_v5\BusinessLogic_CS_v5.csproj   BusinessLogic_CS_v5

Я просмотрел все ссылки на проекты, и нет ни одного проекта, ссылки на которыйsystem.web.mvc, version=3.0.0.0, Все проекты ссылки4.0.0.0, Почему упоминается версия 3.0.0.0? Может быть, он найден в каком-то GAC или какой-то локальной установке?

Если я отключу PostSharp из свойств проекта, проект будет успешно скомпилирован. Так что это должно быть что-то, связанное с PostSharp. Любая помощь будет принята с благодарностью