你好，视觉智能平台非上海oss，在搜索人脸的时候，能不能给一个c#代码片段？[视觉智能开放平台] 暂停朗读为您朗读

        string url = "https://www.www.tongchenyun.com/wp-content/uploads/aliyun/2023/1128/search;        string imageBase64 = Convert.ToBase64String(File.ReadAllBytes(your_image_path.jpg"));        string imageType = "BASE64";        string groupIdList = "your_group_id_list"; // 多个用逗号隔开        int maxUserNum = 1;        string faceType = "LIVE";        string qualityControl = "NONE";        string livenessControl = "NONE";        Dictionary dict = new Dictionary();        dict.Add("image", imageBase64);        dict.Add("image_type", imageType);        dict.Add("group_id_list", groupIdList);        dict.Add("max_user_num", maxUserNum);        dict.Add("face_type", faceType);        dict.Add("quality_control", qualityControl);        dict.Add("liveness_control", livenessControl);        string content = JsonConvert.SerializeObject(dict);        StringContent httpContent = new StringContent(content, Encoding.UTF8);        httpContent.Headers.ContentType = new MediaTypeHeaderValue("application/json");        HttpClient httpClient = new HttpClient();        httpClient.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", accessToken);        HttpResponseMessage response = httpClient.PostAsync(url, httpContent).Result;        if (response.IsSuccessStatusCode)        {            string responseContent = response.Content.ReadAsStringAsync().Result;            Console.WriteLine(responseContent);        }        else        {            Console.WriteLine("Response error: " + response.StatusCode);        }        Console.ReadLine();    }    static string GetAccessToken(string apiKey, string apiSecret)    {        string url = $"https://aip.baidubce.com/oauth/2.0/token?grant_type=client_credentials&client_id={apiKey}&client_secret={apiSecret}";        HttpClient httpClient = new HttpClient();        HttpResponseMessage response = httpClient.GetAsync(url).Result;        if (response.IsSuccessStatusCode)        {            string responseContent = response.Content.ReadAsStringAsync().Result;            dynamic jsonResult = JsonConvert.DeserializeObject(responseContent);            string accessToken = jsonResult.access_token;            return accessToken;        }        else        {            throw new Exception("Failed to get access token from Baidu API");        }    }}