Ejemplo de código de .net core windows service appsettings.json

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Ejemplo: aplicación de consola .net core read appsettings.json

classProgrampublicstaticIConfigurationRoot configuration;staticintMain(string[] args)// Initialize serilog logger
        Log.Logger =newLoggerConfiguration().WriteTo.Console(Serilog.Events.LogEventLevel.Debug).MinimumLevel.Debug().Enrich.FromLogContext().CreateLogger();try// Start!MainAsync(args).Wait();return0;catchreturn1;staticasyncTaskMainAsync(string[] args)// Create service collection
        Log.Information("Creating service collection");ServiceCollection serviceCollection =newServiceCollection();ConfigureServices(serviceCollection);// Create service provider
        Log.Information("Building service provider");IServiceProvider serviceProvider = serviceCollection.BuildServiceProvider();// Print connection string to demonstrate configuration object is populated
        Console.WriteLine(configuration.GetConnectionString("DataConnection"));try
            Log.Information("Starting service");await serviceProvider.GetService<App>().Run();
            Log.Information("Ending service");catch(Exception ex)
            Log.Fatal(ex,"Error running service");throw ex;finally
            Log.CloseAndFlush();privatestaticvoidConfigureServices(IServiceCollection serviceCollection)// Add logging
        serviceCollection.AddSingleton(LoggerFactory.Create(builder =>
            builder
                .AddSerilog(dispose:true);));

        serviceCollection.AddLogging();// Build configuration
        configuration =newConfigurationBuilder().SetBasePath(Directory.GetParent(AppContext.BaseDirectory).FullName).AddJsonFile("appsettings.json",false).Build();// Add access to generic IConfigurationRoot
        serviceCollection.AddSingleton<IConfigurationRoot>(configuration);// Add app
        serviceCollection.AddTransient<App>();

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