public static IApplicationHost Build(this IApplicationHostBuilder hostBuilder) { //string environment = Environment.GetEnvironmentVariable("ASPNETCORE_ENVIRONMENT"); //if (String.IsNullOrWhiteSpace(environment)) // throw new ArgumentNullException("Environment not found in ASPNETCORE_ENVIRONMENT"); var builder = new ConfigurationBuilder() .SetBasePath(Path.Combine(Directory.GetCurrentDirectory())) .AddJsonFile("appsettings.json", optional: true, reloadOnChange: true) //.AddJsonFile($"appsettings.Development.json", optional: true, reloadOnChange: true) ; IConfiguration configuration = builder.Build(); hostBuilder.ApplicationFramework.Services.AddTransient((sp) => configuration); IBootstrapper bootstrapper = (IBootstrapper)Activator.CreateInstance(hostBuilder.ApplicationFramework.BootstrapperType, new[] { configuration }); bootstrapper.ConfigureServices(hostBuilder.ApplicationFramework.Services); hostBuilder.ApplicationFramework.BuildServiceProvider(); ILoggingBuilder loggingBuilder = hostBuilder.ApplicationFramework.ServiceProvider.GetService <ILoggingBuilder>(); bootstrapper.Configure(hostBuilder, loggingBuilder); return(new DefaultApplicationHost(hostBuilder.ApplicationFramework)); }