public class Program

    {

        public static async Task Main(string[] args)

        {

            var builder = WebAssemblyHostBuilder.CreateDefault(args);

            builder.RootComponents.Add<App>("#app");

​

            ConfigureServices(builder);

​

            var baseApiUrl = builder.Configuration["ContentAuthoringToolApiUrl"]!;

            builder.Services.AddTransient(_ => new HttpClient { BaseAddress = new Uri(baseApiUrl) });

​

            var host = builder.Build();

            await host.RunAsync();

        }

​

        public static WebAssemblyHostBuilder CreateHostBuilder(string[] args) =>

            WebAssemblyHostBuilder.CreateDefault();

​

        private static void ConfigureServices(WebAssemblyHostBuilder builder)

        {

            ...

        }

​

        private static void RegisterServices(WebAssemblyHostBuilder builder)

        {

            builder.Services.AddSingleton<ICatClient, CatClient>();

            ...

        }

    }