CODEWITHSUNDEEP
elasticsearchnest.net-framework-versionelasticsearch.net
Nikita Chaudhary
Nikita Chaudhary

Reputation: 57

Could not load file or assembly 'netstandard' or one of its dependencies

I upgraded my solutions ElasticSearch.net and nest library to 7.1.0 version. After deploying the code I am getting below error:

BadImageFormatException: Could not load file or assembly 'netstandard' 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

i tried copying the library to the server i deployed but that doesn't work.

Upgrade Details: 1.)ElasticSearch.net 5.6.1 to 7.1.0

2.)Nest 5.6.1 to 7.1.0

3.) .NetFramework 4.7.3 installed

4.) VS2017

upgraded from nuget package manager.

Upvotes: 2

Views: 1737

Answers (1)

Nikita Chaudhary
Nikita Chaudhary

Reputation: 57

The issue got resolved by manually adding the reference of netstandard library in csproj file like below:

<Reference Include="netstandard">
  <Private>True</Private>
</Reference>

The above workaround is provided from - You must add a reference to assembly 'netstandard, Version=2.0.0.0

Upvotes: 3

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