CODEWITHSUNDEEP
asp.netvisual-studio
Krunal
Krunal

Reputation: 1188

Cannot load a reference assembly for execution

All of a sudden my website is not loading and giving me below error. I am running VS2017 with .Net Framework 4.7.1 on Windows 10 Home.

[BadImageFormatException: Cannot load a reference assembly for execution.]

[BadImageFormatException: Could not load file or assembly 'System.IO.Compression.ZipFile' or one of its dependencies. Reference assemblies should not be loaded for execution.  They can only be loaded in the Reflection-only loader context. (Exception from HRESULT: 0x80131058)]
   System.Reflection.RuntimeAssembly._nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, RuntimeAssembly locationHint, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks) +0
   System.Reflection.RuntimeAssembly.InternalLoadAssemblyName(AssemblyName assemblyRef, Evidence assemblySecurity, RuntimeAssembly reqAssembly, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks) +225
   System.Reflection.RuntimeAssembly.InternalLoad(String assemblyString, Evidence assemblySecurity, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean forIntrospection) +110
   System.Reflection.RuntimeAssembly.InternalLoad(String assemblyString, Evidence assemblySecurity, StackCrawlMark& stackMark, Boolean forIntrospection) +22
   System.Reflection.Assembly.Load(String assemblyString) +34
   System.Web.Configuration.CompilationSection.LoadAssemblyHelper(String assemblyName, Boolean starDirective) +48

[ConfigurationErrorsException: Could not load file or assembly 'System.IO.Compression.ZipFile' or one of its dependencies. Reference assemblies should not be loaded for execution.  They can only be loaded in the Reflection-only loader context. (Exception from HRESULT: 0x80131058)]
   System.Web.Configuration.CompilationSection.LoadAssemblyHelper(String assemblyName, Boolean starDirective) +729
   System.Web.Configuration.CompilationSection.LoadAllAssembliesFromAppDomainBinDirectory() +247
   System.Web.Configuration.CompilationSection.LoadAssembly(AssemblyInfo ai) +157
   System.Web.Compilation.BuildManager.GetReferencedAssemblies(CompilationSection compConfig) +226
   System.Web.Compilation.BuildManager.GetPreStartInitMethodsFromReferencedAssemblies() +73
   System.Web.Compilation.BuildManager.CallPreStartInitMethods(String preStartInitListPath, Boolean& isRefAssemblyLoaded) +321
   System.Web.Compilation.BuildManager.ExecutePreAppStart() +170
   System.Web.Hosting.HostingEnvironment.Initialize(ApplicationManager appManager, IApplicationHost appHost, IConfigMapPathFactory configMapPathFactory, HostingEnvironmentParameters hostingParameters, PolicyLevel policyLevel, Exception appDomainCreationException) +734

[HttpException (0x80004005): Could not load file or assembly 'System.IO.Compression.ZipFile' or one of its dependencies. Reference assemblies should not be loaded for execution.  They can only be loaded in the Reflection-only loader context. (Exception from HRESULT: 0x80131058)]
   System.Web.HttpRuntime.FirstRequestInit(HttpContext context) +525
   System.Web.HttpRuntime.EnsureFirstRequestInit(HttpContext context) +118
   System.Web.HttpRuntime.ProcessRequestNotificationPrivate(IIS7WorkerRequest wr, HttpContext context) +708

Any suggestions?

Upvotes: 61

Views: 57741

Answers (9)

Luca Mozzo
Luca Mozzo

Reputation: 962

I had the same issue after migrating from .NET framework 4.6.2 to 4.8, and none of the recommended fixes worked for me, until I updated my project to the newest .NET Framework 4.8.1. I the proceeded with the deletion of the bin folder and it started working again

Upvotes: 0

Deshani Tharaka
Deshani Tharaka

Reputation: 303

I deleted the bin and obj folders of startup project. Then re-build the solution. It worked.

Upvotes: 2

Ste Brown
Ste Brown

Reputation: 169

I encountered this issue when upgrading from 4.6.2 to 4.8.

Fix:

  1. Delete assembly redirects from web.config
  2. Rebuild project
  3. Double click assembly binding warning in vs to regenerate the necessary redirects
  4. Rebuild with no warnings

Upvotes: 3

onyangofred
onyangofred

Reputation: 142

After all the delete nbin folder/obj folder/clean/rebuild: nothing will work. The error clearly tells you the assembly with the problem. Go to your web.config file and locate that assembly. Remove it and reference it afresh

Upvotes: 2

rohit panchal
rohit panchal

Reputation: 61

I also faced this issue multiple time, This error may cause by reference or loading issue of dll's in your bin folder. just remove .bin folder and rebuild your application It will work.

Happy coding.

Upvotes: 6

oflahero
oflahero

Reputation: 1330

There's a known issue with .NET Framework 4.7.1 in this regard. Supposedly sorted in 4.7.2, but in the meantime what can you do?

The issue is related to the serialization assemblies, which you can optionally set to generate or not as part of your build (rclick project -> Properties -> Build tab -> see 'Generate serialization assemblies' at bottom.)

What worked for me - and I'm standing on the shoulders of others in part here - is to ensure this setting is set to 'Auto'. Do a full 'clean solution', and additionally if paranoid, this PowerShell snippet is handy if run in your solution root folder:

Get-ChildItem .\ -include bin,obj -Recurse | foreach ($_) { remove-item $_.fullname -Force -Recurse }

Next, add the following targets to your csproj (just inside the enclosing <Project> tag:

<Target Name="RemoveDesignTimeFacadesBeforeSGen" BeforeTargets="GenerateSerializationAssemblies">
    <ItemGroup>
      <ReferencePath Remove="@(_DesignTimeFacadeAssemblies_Names->'%(OriginalIdentity)')" />
    </ItemGroup>
    <Message Importance="normal" Text="Removing DesignTimeFacades from ReferencePath before running SGen." />
  </Target>
  <Target Name="ReAddDesignTimeFacadesBeforeSGen" AfterTargets="GenerateSerializationAssemblies">
    <ItemGroup>
      <ReferencePath Include="@(_DesignTimeFacadeAssemblies_Names->'%(OriginalIdentity)')" />
    </ItemGroup>
    <Message Importance="normal" Text="Adding back DesignTimeFacades from ReferencePath now that SGen has run." />
  </Target>

If still no luck, explicitly set 'Generate serialization assemblies' to 'On' to force generation, and rebuild & run.

Upvotes: 12

Hamit YILDIRIM
Hamit YILDIRIM

Reputation: 4549

I have some research about the error

As we can see from the error, when we refer to SOAP based projects in Aspnetcore projects, we cannot use them directly. This is due to the implementation of the platform Aspnetcore.

It could be loaded using reflection. However, it allows us to use internal types dynamically. Support may be released in later versions of Aspnetcore for licenced soap assembly etc.

Deleting the bin folder, etc. is a solution when dll versions are different X86 or 64 etc. The real problem is the SOAP protocol, WebSocket, Proxy etc implementation. They cannot be used directly with Aspnetcore project. There's patch projects for that in github

Upvotes: 1

Muralidharan Ramakrishnan
Muralidharan Ramakrishnan

Reputation: 559

Today I have installed Acumatica 2018 R1 and I have come across this issue. Removing System.IO.Compression.ZipFile from bin folder fixed the problem.

Upvotes: 6

VG8TS
VG8TS

Reputation: 1200

What worked for me was deleting the bin and obj directories under my web app then rebuilding.

Upvotes: 109

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