public static void Main(string[] args) { var host = CreateWebHostBuilder(args).Build(); using (var scope = host.Services.CreateScope()) { var services = scope.ServiceProvider; try { var dataSource = services.GetRequiredService <DataSource>(); dataSource.Comments = HTTPRequests.GetComments(); dataSource.Posts = LinqRequests.GetPostsEntity(HTTPRequests.GetPosts() , dataSource.Comments); dataSource.Todos = HTTPRequests.GetTodos(); dataSource.Users = LinqRequests.GetUsersEntity(HTTPRequests.GetUsers() , dataSource.Posts, dataSource.Todos); } catch (Exception ex) { var logger = services.GetRequiredService <ILogger <Program> >(); logger.LogError(ex, "An error occurred while creating data source."); } } host.Run(); }