The underlying connection was closed: The connection was closed unexpectedly.

基础连接已经关闭: 连接被意外关闭。

 

基础连接已经关闭: 发送时发生错误 

 

防火墙问题。或是杀毒软件,卫士之类的。(360 卸载 )

转载于:https://www.cnblogs.com/runliuv/p/11212533.html

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