After updating an Azure Function to .NET8, it fails with "Could not load file or assembly 'System.Console, Version=8.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'. The system cannot find the file specified."

Question

I tried to upgrade an Azure Function to .NET8 and the latest Azure Function runtime. It fails each run with the following error:

Could not load file or assembly 'System.Console, Version=8.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'. The system cannot find the file specified.

I can get this function to execute locally, but not when it is deployed to Azure.

Answer 1

Refer to: https://stackoverflow.com/questions/77501626/upgrading-my-azure-function-to-net8-fails-with-the-error-could-not-load-file-or
Solved by adding ”FUNCTIONS_INPROC_NET8_ENABLED": "1" to local.settings.json:

{
    "IsEncrypted": false,
    "Values": {
        "AzureWebJobsStorage": "UseDevelopmentStorage=true",
        "FUNCTIONS_INPROC_NET8_ENABLED": "1",
        "FUNCTIONS_WORKER_RUNTIME": "dotnet"
    }
}

Answer 2

Hello @CMagoun

It seems like the error is caused by a missing assembly reference. The System.Consoleassembly is not included in the Azure Functions runtime.

To resolve this issue, you can try the following steps:

1. Add a reference to the System.Console NuGet package in your Azure Function project.
2. Ensure that the package is included in the deployment package by checking the "Copy Local" property of the reference. Set it to "True" if it is not already.
3. If the issue persists, try adding a binding redirect to the app.config file of your Azure Function project.

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