secure-sharing/SecureSharing.Business/Infrastructure/StartupConfiguration.cs

using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;

namespace SecureSharing.Business.Infrastructure;

public sealed class StartupConfiguration
{
    public static TConfig ConfigureStartupConfig<TConfig>(IServiceCollection services, IConfiguration configuration)
        where TConfig : class, new()
    {
        if (services is null)
            throw new ArgumentNullException(nameof(services));

        if (configuration is null)
            throw new ArgumentNullException(nameof(configuration));

        //create instance of config
        var config = new TConfig();
        var classType = typeof(TConfig);
        //bind it to the appropriate section of configuration
        configuration.Bind(classType.Name, config);

        //and register it as a service
        services.AddSingleton(config);

        return config;
    }
}