通过C#代码从DocuSign文档中检索字段，比如名字、姓氏

using System;
using System.Net.Http;
using System.Net.Http.Headers;
using System.Threading.Tasks;

class Program
{
    static async Task Main(string[] args)
    {
        string accessToken = "YOUR_ACCESS_TOKEN";
        string accountId = "YOUR_ACCOUNT_ID";
        string envelopeId = "YOUR_ENVELOPE_ID";

        using (HttpClient client = new HttpClient())
        {
            client.BaseAddress = new Uri("https://demo.docusign.net/restapi/v2.1/accounts/" + accountId + "/envelopes/" + envelopeId + "/fields");
            client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", accessToken);

            HttpResponseMessage response = await client.GetAsync("");
            if (response.IsSuccessStatusCode)
            {
                string responseBody = await response.Content.ReadAsStringAsync();
                Console.WriteLine(responseBody);
            }
            else
            {
                Console.WriteLine("Error: " + response.StatusCode);
            }
        }
    }
}