如何使用C#将值传递到ActiveCampaign中的列表

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

class Program
{
    static async Task Main(string[] args)
    {
        string apiKey = "YOUR_API_KEY";
        string listId = "YOUR_LIST_ID";
        string value = "YOUR_VALUE";

        using (HttpClient client = new HttpClient())
        {
            client.DefaultRequestHeaders.Add("Api-Token", apiKey);

            string url = $"https://YOUR_ACCOUNT.api-us1.com/api/3/contactLists/{listId}/contactTags";
            string json = $"{{\"contactTag\": {{\"tag\": \"{value}\"}}}}";

            var response = await client.PostAsync(url, new StringContent(json));

            if (response.IsSuccessStatusCode)
            {
                Console.WriteLine("Value successfully added to ActiveCampaign list.");
            }
            else
            {
                Console.WriteLine("Failed to add value to ActiveCampaign list.");
            }
        }
    }
}