Bind configurations to an object

HomeController.cs

// Class to hold mail feature json object
public class MailFeatureSettings
{
    public string Type { get; set; }
    public string From { get; set; }
    public string Subject { get; set; }
}

// Startup.cs code
public class Startup
{
    public Startup(IConfiguration configuration)
    {
        Configuration = configuration;
    }

    public IConfiguration Configuration { get; }

    // This method gets called by the runtime. Use this method to add services to the container.
    public void ConfigureServices(IServiceCollection services)
    {
        // some code...
        
        // bind config settings to an object
        List<MailFeatureSettings> mailFeatureSettings = new List<MailFeatureSettings>();
        Configuration.GetSection("MailFeature").Bind(mailFeatureSettings);
        
        // register object in DI container so that it can be injected
        services.AddSingleton<IList<MailFeatureSettings>>(mailFeatureSettings);

        // some code...
    }

    // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
    public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
    {
        // some code...
    }
}

// HomeController.cs
public class HomeController : Controller
{
    private readonly ILogger<HomeController> _logger;
    private readonly IList<MailFeatureSettings> mailFeatureSettings;

    // Injected the list of mail feature settings
    public HomeController(ILogger<HomeController> logger, IList<MailFeatureSettings> mailFeatureSettings)
    {
        _logger = logger;
        this.mailFeatureSettings = mailFeatureSettings;
    }

    public IActionResult Index()
    {
        // Use the settings from mail feature settings list
        ViewData["Email"] = mailFeatureSettings[0].From; 
        return View();
    }
}