Using Polly with HttpClient

PolicySample.cs

public PolicySample() => AppServices = ConfigureServices();

private ServiceProvider ConfigureServices()
{
  var services = new ServiceCollection();
  services.AddLogging(builder =>
  {
    builder.AddFilter((category, level) => true);
    builder.AddConsole(options => options.IncludeScopes = true);
  });
  services.AddHttpClient("cni", client =>
  {
    client.BaseAddress = new Uri("https://www.cninnovation1.com"); // not found server
  })
  //.AddPolicyHandler(Policy.TimeoutAsync<HttpResponseMessage>(TimeSpan.FromSeconds(10)))
  .AddTransientHttpErrorPolicy(policy => policy.WaitAndRetryAsync(new [] { TimeSpan.FromSeconds(1), TimeSpan.FromSeconds(5), TimeSpan.FromSeconds(10) }))  // network failures, HTTP 5xx, HTTP 408
  .AddTypedClient<PolicyClient>();
  return services.BuildServiceProvider();
}

public IServiceProvider AppServices { get; private set; }