The underlying connection was closed: Could not establish trust relationship for the SSL/TLS secure

在Windows 2003 R2(Sp1)上,用HttpWebRequest访问Https时出现“The underlying connection was closed: Could not establish trust relationship for the SSL/TLS secure channel.

https://social.technet.microsoft.com/Forums/zh-CN/9dd05213-665f-452a-80ca-2c04b17d798d/ssl-certificate-issues-in-windows-server-2003?forum=winserversecurity

同适用于2008

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