Azure Functions V2 Startup Class

Startup.cs

[assembly: FunctionsStartup(typeof(Startup))]
namespace Function.DependencyInjection.Timer
{
    public class Startup : FunctionsStartup
    {
        public override void Configure(IFunctionsHostBuilder builder)
        {
            builder.Services.AddScoped<IHelloService, HelloService>();
        }
    }
}