Version 1.15.1 and 1.15.2 - Could not load file or assembly Microsoft.Extensions.Options #292

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1. epasos573 commented on Oct 8, 2021

   

   epasos573

   on Oct 8, 2021

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   Hi @coder-candace Could you please let me know what is the target framework set for your library Function-ZipWhipEngine (i.e. it should also be .Net Core 3.1)? The error thrown is from Microsoft.Extensions.Options which is a dependency for Microsoft.Extensions.WebEncoders (target framework .Net Core 3.1). In case, may I request a sample library that throws this exception so I could verify it further in my dev environment? Thanks.
2. coder-candace commented on Oct 12, 2021

   

   coder-candace

   on Oct 12, 2021

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   Hi @epasos573 yes the target framework is .NET Core 3.1.

   I was able to further narrow down where the problem is occurring. It's happening on this line.
   [assembly: FunctionsStartup(typeof(Function_ZipWhipEngine.Startup))]

   If you remove that line, error goes away and project fires up as expected. Add it back and error returns. Problem is if we just remove this line then our Configure() override won't run and we can't set up required application settings.

   Here is a sample project demonstrating the issue
   ZipWhipEngine-Sample3.zip
3. epasos573 commented on Oct 13, 2021

   

   epasos573

   on Oct 13, 2021

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   Hi @coder-candace Thanks for the sample code and after verifying the issue, I could see that the Microsoft.Extensions.Options is having a conflict with the Microsoft.Extensions.WebEncoders on application load.

   To replicate the issue, I have updated the sample code you have provided. I uninstalled CloudinaryDotNet package and installed the Microsoft.Extensions.WebEncoders package into ZipWhipEngine project . And launching the application throws the issue: Could not load file or assembly 'Microsoft.Extensions.Options, Version=5.0.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60'. The system cannot find the file specified. Value cannot be null. (Parameter 'provider').

   Testing the case further, I have used the Environment.CurrentDirectory instead in order to set the application base path.

       var appDirectory = Environment.CurrentDirectory;
       configurationBuilder.SetBasePath(appDirectory)
                .AddJsonFile("appSettings.json", false, true)
                .AddJsonFile("local.settings.json", true, true)
                .AddEnvironmentVariables();
   

   See attached updated project
   ZipWhipEngine_Modified.zip
   :
4. JT-Bruch commented on Dec 6, 2021

   

   JT-Bruch

   on Dec 6, 2021

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   I also have the same issue - basic install into a .NET Core 3.1 DLL with only these dependencies.

     <ItemGroup>
   	  <PackageReference Include="Microsoft.Extensions.Configuration.Binder" Version="3.1.17" />
   	  <PackageReference Include="Microsoft.Extensions.Configuration.Abstractions" Version="3.1.17" />
   	  <PackageReference Include="Microsoft.Extensions.DependencyInjection.Abstractions" Version="3.1.17" />
     </ItemGroup>
   
5. epasos573 commented on Dec 7, 2021

   

   epasos573

   on Dec 7, 2021

   Last edited by epasos573

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   @JT-Bruch The CloudinaryDotNet SDK is compatible with .Net Core 3.1, while the error reported above is linked to the other Microsoft packages used in the solution that are not yet compatible with .Net Core 3.1. And the proposed solution is to use other libraries that is fully functional with the version of .Net Framework/Core being used.

   As for your case, reviewing the dependencies requirements for Microsoft.Extensions.DependencyInjection.Abstractions (see Nuget link), it is only compatible with .NETStandard 2.0.

   Please take a look and see if that helps.