Configuration with options pattern is not working-CodePudding

I try to make Options Pattern work for a Microsoft.NET.Sdk project. Following the documentation, the pattern is implemented like so:

public static class DependencyInjection
{
    public static IServiceCollection AddInfrastructure(this IServiceCollection services, IConfiguration configuration)
    {   
        services.Configure<AzureBlobStorageOptions>(configuration.GetSection("AzureBlobStorage"));
        services.AddScoped<IStorageService, AzureBlobStorageService>();

        return services;
    }
}

Use it:

public class AzureBlobStorageOptions
{
    public string ConnectionString { get; set; } = String.Empty;

    public string Container { get; set; } = String.Empty;
}

public class AzureBlobStorageService : IStorageService
{
    private readonly CloudStorageAccount _storageAccount;

    private readonly AzureBlobStorageOptions _options;

    public AzureBlobStorageService(IOptions<AzureBlobStorageOptions> options)
    {
        _options = options.Value;

        if (!CloudStorageAccount.TryParse(_options.ConnectionString, out _storageAccount))
        {
            throw new ArgumentException("Cannot create client from connection string.");
        }
    }
}

appsettings.json

{
  "AzureBlobStorage": {
    "ConnectionString": "....",
    "Container": "mycontainer"
  }
}

I made sure that appsettings.json are always copied. However options.Value is always null. Any ideas what I am missing here? I looked through all SO related topics and this https://github.com/dotnet/AspNetCore.Docs/issues/15940 but could not find a solution.

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