标签：ons client ack cer core question tps pcl cert
webclient 可以替换为 HttpClient
下载获取url的内容：
证书： https://stackoverflow.com/questions/40014047/add-client-certificate-to-net-core-httpclient
标签：ons client ack cer core question tps pcl cert
原文地址：http://www.cnblogs.com/zxs-onestar/p/7340386.html
