以下代码会导致此错误:
远程服务器返回错误:(400)错误请求。
NameValueCollection parameters = new NameValueCollection();
parameters.Add("access_token", Session["AT"].ToString());
WebClient client = new WebClient();
var result = client.UploadValues("https://api.instagram.com/v1/media/1144917811612429247_571137889/likes", "POST", parameters);
var response = System.Text.Encoding.Default.GetString(result);
我做错了什么?