服务调用webclient、httpclient、httpwebrequest

https://pan.baidu.com/s/19WMLYCBdUM-Z4W_k8Uvj0g?pwd=eigk  WebClient, HttpClient, HttpWebRequest的调用

https://pan.baidu.com/s/11k9KL8I4q2PCobV5nIh46Q?pwd=avom      WebClient, HttpClient, HttpWebRequest的比较

https://blog.csdn.net/u010476739/article/details/119782562   httpclient