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I have an app running on azure. I have recently updated it to .NET 7 but the deploy always works fine. Yesterday I deployed the app without changing or adding a dependency and I got this exception.

System.IO.FileNotFoundException: Could not load file or assembly 'Microsoft.Extensions.Logging.Abstractions, Version=7.0.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60'. The system cannot find the file specified. File name: 'Microsoft.Extensions.Logging.Abstractions, Version=7.0.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60' at Microsoft.Extensions.DependencyInjection.LoggingServiceCollectionExtensions.AddLogging(IServiceCollection services, Action`1 configure) at

When I run the project locally it starts without an error. I have tried to add the missing dependency but this does not fix the error. enter image description here enter image description here

I have also checked the wwwroot folder on azure but the dll is there

enter image description here

What I have tried :

Is there anything I have missed to change it? Any help is welcome.

Update:

As Harshitha suggest in the comments I have also the following lines to the .csproj and to my webconfig. But it does not help

.csproj

    <ItemGroup>
    <Content Include="packages\microsoft.extensions.logging.abstractions\7.0.0\.signature.p7s" />
    <Content Include="packages\microsoft.extensions.logging.abstractions\7.0.0\microsoft.extensions.logging.abstractions.7.0.0.nupkg" />
    <Reference Include="Microsoft.Extensions.Logging.Abstractions" Version="7.0.0" Culture="neutral" PublicKeyToken="adb9793829ddae60" processorArchitecture="MSIL">
        <HintPath>packages\microsoft.extensions.logging.abstractions\7.0.0\lib\net7.0\Microsoft.Extensions.Logging.Abstractions.dll</HintPath>
    </Reference>
</ItemGroup>

web.config

    <runtime>
    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
        <dependentAssembly>
            <assemblyIdentity name="Microsoft.Extensions.Logging.Abstractions" publicKeyToken="adb9793829ddae60" culture="neutral" />
            <bindingRedirect oldVersion="0.0.0.0-7.0.0.0" newVersion="7.0.0.0" />
        </dependentAssembly>
    </assemblyBinding>
</runtime>
Manuel1234
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  • This type of issue occurs when there is a conflict with the installed package Version.We need to add the package within the dependent assembly section in `Web.Config` file. – Harshitha Jun 18 '23 at 04:57
  • Add the below section in `Web.config` file.` ` – Harshitha Jun 18 '23 at 05:04
  • @Harshitha I have tried you suggestion but error still persists. Anything else I can do ? – Manuel1234 Jun 18 '23 at 08:24
  • Need to add hintpath as mentioned in this so thread.It is for another dll but need to add sections same like this.Refer this thread [once](https://stackoverflow.com/a/76356099/19648279) – Harshitha Jun 18 '23 at 10:14
  • @Harshitha I have added the lines aso suggested in the link but error still persists. I have checked the dll version in the wwwroot and it is current 6.0.3. When I check my bin/debug folder there is no Microsoft.Extensions.Logging.Abstractions.dll. How can force the dll build ? – Manuel1234 Jun 18 '23 at 12:19
  • I have updated my description above with the things I have done – Manuel1234 Jun 18 '23 at 12:30
  • Let us [continue this discussion in chat](https://chat.stackoverflow.com/rooms/254127/discussion-between-harshitha-and-manuel1234). – Harshitha Jun 18 '23 at 12:36

1 Answers1

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As I have mentioned in the Comments this type of issue arise because of the same package installed with two different versions (Version Conflict).

Example:

When you have installed Serilog.AspNetCore, the package Microsoft.Extensions.Logging.Abstractions is included in the Microsoft.Extensions.Logging.

enter image description here

When I check my bin/debug folder there is no Microsoft.Extensions.Logging.Abstractions.dll.

  • As Microsoft.Extensions.Logging.Abstractions is under Serilog.AspNetCore , it will not be available in the bin folder.

  • Initially even Iam unable to find the package in bin. enter image description here

  • You might have installed the same package again with another version.

How can force the dll build ?

This can be done in either of the below way:

Either by installing the latest version in VS Local, build and re-deploying the app.

OR

By copying the required version directly in wwwroot folder (which you have already done and worked for you).

Harshitha
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