C# 未找到C wp json api（404）错误

我试图通过wp api在wordpress上发布，但我得到了错误：

An unhandled exception of type 'System.Net.WebException' occurred in System.dll

Additional information: The remote server returned an error: (404) Not Found.

我无法理解，因为当我转到链接时，插件工作正常：我得到了预期的json数据，没有任何错误告诉我插件工作正常。我的代码如下：

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Text;
using System.Threading.Tasks;

namespace WordpressPost
{
class Program
{
    static void Main(string[] args)
    {
        var uri = "http://www.example.com/wp-json/";
        var username = "user";
        var password = "password";

        var webRequest = WebRequest.Create(uri);
        webRequest.Headers["Authorization"] = "Basic " + Convert.ToBase64String(Encoding.Default.GetBytes(username + ":" + password));
        webRequest.ContentType = "application/json";
        webRequest.Method = "POST";

        var streamWriter = new StreamWriter(webRequest.GetRequestStream());

        string json = "{\"title\":\"Hello World!\",\"content_raw\":\"Content\",\"excerpt_raw\":\"Excerpt\"}";

        streamWriter.Write(json);
        streamWriter.Close();

        var response = (HttpWebResponse)webRequest.GetResponse();
        var streamReader = new StreamReader(response.GetResponseStream());
        var result = streamReader.ReadToEnd();
        Console.WriteLine(result.ToString());

        Console.ReadLine();
    }
}
}

我已经安装了两个必要的插件JSON基本身份验证、WP REST API，还启用了漂亮的permalinks。我做错了什么

---

我是c新手，这就是我选择基本身份验证登录的原因。

嘿，你解决了吗？