如何在ASP.NET MVC中使用Coinpayments.net nuget包？

<configuration>
  <appSettings>
    <add key="Coinpayments.ApiKey" value="YOUR_API_KEY" />
    <add key="Coinpayments.ApiSecret" value="YOUR_API_SECRET" />
  </appSettings>
</configuration>

using Coinpayments;

public class HomeController : Controller
{
    private CoinpaymentsClient _client;

    public HomeController()
    {
        string apiKey = ConfigurationManager.AppSettings["Coinpayments.ApiKey"];
        string apiSecret = ConfigurationManager.AppSettings["Coinpayments.ApiSecret"];
        _client = new CoinpaymentsClient(apiKey, apiSecret);
    }

    public ActionResult Index()
    {
        // 使用Coinpayments.net的功能
        // ...
        return View();
    }
}