在HttpWebRequest上设置ContentLength时出现超时错误

HttpWebRequest request = (HttpWebRequest)WebRequest.Create("http://example.com");
request.Timeout = 10000; // 设置请求超时时间为10秒

string requestBody = "{\"key\": \"value\"}";
byte[] requestBodyBytes = Encoding.UTF8.GetBytes(requestBody);

HttpWebRequest request = (HttpWebRequest)WebRequest.Create("http://example.com");
request.Method = "POST";
request.ContentLength = requestBodyBytes.Length; // 设置请求体大小
request.ContentType = "application/json";

Stream requestStream = request.GetRequestStream();
requestStream.Write(requestBodyBytes, 0, requestBodyBytes.Length);
requestStream.Close();