Typed http client configuration and registration

ConfigureHttpClient.cs

public static class ServiceExtensions
{
    public static IServiceCollection AddTypedHttpClient(this IServiceCollection service, IConfiguration configuration)
    {
        service.Configure<HttpClientConfiguration>(
            configuration.GetSection(nameof(HttpClientConfiguration)));

        var provider = service.BuildServiceProvider();
        var httpConfiguration = provider.GetService<IOptions<HttpClientConfiguration>>().Value;

        service.AddHttpClient<IMyHttpClient, MyHttpClient>(c =>
        {
            if (!string.IsNullOrEmpty(httpConfiguration.BaseAddress))
            {
                c.BaseAddress = new Uri(httpConfiguration.BaseAddress);
            }

            if (!string.IsNullOrEmpty(httpConfiguration.XApiKey))
            {
                c.DefaultRequestHeaders.TryAddWithoutValidation("X-Api-Key", httpConfiguration.XApiKey);
            }

            // add any other headers
            foreach (var header in httpConfiguration.DefaultHeaders)
            {
                c.DefaultRequestHeaders.TryAddWithoutValidation(header.Key, header.Value);
            }

            c.Timeout = httpConfiguration.RequestTimeout;
        })
        .AddTransientHttpErrorPolicy(httpConfiguration.RetryCount, httpConfiguration.RetryWaitDuration);

        return service;
    }

    public static IHttpClientBuilder AddTransientHttpErrorPolicy(
        this IHttpClientBuilder builder, int retryCount, TimeSpan duration)
    {
        builder.AddTransientHttpErrorPolicy(p => p.WaitAndRetryAsync(retryCount, _ => duration));

        return builder;
    }
}

HttpClientConfiguration.cs

public class HttpClientConfiguration
{
    public string HttpClientName { get; set; } = "DefaultHttpClient";
    public string BaseAddress { get; set; }
    public string RequestUri { get; set; }
    public List<HttpHeaderParameters> DefaultHeaders { get; set; } = new List<HttpHeaderParameters>();
    public string XApiKey { get; set; }
    public int RetryCount { get; set; } = 3;
    public TimeSpan RetryWaitDuration { get; set; } = TimeSpan.FromMilliseconds(600);
    public TimeSpan RequestTimeout { get; set; } = TimeSpan.FromHours(1);
}

public class HttpHeaderParameters
{
    public string Key { get; set; }
    public string Value { get; set; }
}