请求已中止：无法创建SSL / TLS安全通道(The request was aborted: Could not create SSL/TLS secure channel)

 由于此错误消息，我们无法使用WebRequest连接到HTTPS服务器： 
 
 The request was aborted: Could not create SSL/TLS secure channel. 
 
 我们知道服务器没有使用所使用路径的有效的HTTPS证书，但为了避免这个问题，我们使用我们从另一个StackOverflow文章中获取的以下代码： 
 
private void Somewhere() {
    ServicePointManager.ServerCertificateValidationCallback += new RemoteCertificateValidationCallback(AllwaysGoodCertificate);
}

private static bool AllwaysGoodCertificate(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors policyErrors) {
   return true;
}
 
 问题是服务器永远不会验证证书，并且失败并出现上述错误。 有人有什么想法应该怎么办？ 
 
 
 我应该提到一个同事和我在几个星期前进行了测试，它的工作正常，类似于我上面写的内容。 我们发现的唯一的“主要区别”就是我使用的是Windows 7，而他正在使用Windows XP。 这会改变什么吗？ 

We are unable to connect to an HTTPS server using WebRequest because of this error message:
 
The request was aborted: Could not create SSL/TLS secure channel.
 
We know that the server doesn't have a valid HTTPS certificate with the path used, but to bypass this issue, we use the following code that we've taken from another StackOverflow post:
 
private void Somewhere() {
    ServicePointManager.ServerCertificateValidationCallback += new RemoteCertificateValidationCallback(AlwaysGoodCertificate);
}

private static bool AlwaysGoodCertificate(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors policyErrors) {
   return true;
}
 
The problem is that server never validates the certificate and fails with the above error. Does anyone have any idea of what should I do?
 
 
I should mention that a colleague and I performed tests a few weeks ago and it was working fine with something similar to what I wrote above. The only "major difference" we've found is that I'm using Windows 7 and he was using Windows XP. Does that change something?

原文：https://stackoverflow.com/questions/2859790