如何在ASP.NET C#中获取对应美元的比特币价值？

using System;
using System.Net;
using System.IO;
using Newtonsoft.Json.Linq;

public decimal GetBitcoinPriceInUSD()
{
    string url = "https://api.coindesk.com/v1/bpi/currentprice/BTC.json";
    decimal bitcoinPrice = 0;

    try
    {
        HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
        HttpWebResponse response = (HttpWebResponse)request.GetResponse();

        using (Stream stream = response.GetResponseStream())
        {
            StreamReader reader = new StreamReader(stream);
            string json = reader.ReadToEnd();

            JObject data = JObject.Parse(json);
            decimal rate = (decimal)data["bpi"]["USD"]["rate_float"];
            bitcoinPrice = rate;
        }
    }
    catch (Exception ex)
    {
        // 处理异常情况
        // 可以记录日志或返回默认值等
    }

    return bitcoinPrice;
}

decimal bitcoinPriceInUSD = GetBitcoinPriceInUSD();