c#通用应用平台证书公钥

在本文https://blogs.windows.com/buildingapps/2015/10/13/create-more-secure-apps-with-less-effort-10-by-10/中，他们向您解释了如何安全地连接到服务器。他们检查指纹以确认证书是合法的。但是证书会随着时间的推移而改变，我所检查的硬编码字符串将不再有效。

这就是我想提取公钥的原因。因为我确定它不会从一个证书改变到另一个。

在此代码中:

        private async Task DemoSSLRoot()
    {
        // Send a get request to Bing
        HttpClient client = new HttpClient();
        Uri bingUri = new Uri("https://www.bing.com");
        HttpResponseMessage response = await client.GetAsync(bingUri);
        // Get the list of certificates that were used to validate the server's identity
        IReadOnlyList<Certificate> serverCertificates = response.RequestMessage.TransportInformation.ServerIntermediateCertificates;
        // Perform validation
        if (!ValidCertificates(serverCertificates))
        {
            // Close connection as chain is not valid
            return;
        }
        PrintResults("Validation passed'n");
        // Validation passed, continue with connection to service
    }
    private bool ValidCertificates(IReadOnlyList<Certificate> certs)
    {
        // In this example, we iterate through the certificates and check that the chain contains
        // one specific certificate we are expecting
        for (int i = 0; i < certs.Count; i++)
        {
            PrintResults("Cert# " + i + ": " + certs[i].Subject + "'n");
            byte[] thumbprint = certs[i].GetHashValue();
            // Check if the thumbprint matches whatever you are expecting
            // ‎d4 de 20 d0 5e 66 fc 53 fe 1a 50 88 2c 78 db 28 52 ca e4 74
            byte[] expected = new byte[] { 212, 222, 32, 208, 94, 102, 252, 83, 254, 26, 80, 136, 44, 120, 219, 40, 82, 202, 228, 116 };
            if (ThumbprintMatches(thumbprint, expected))
            {
                return true;
            }
        }
        return false;
    }

在https://blogs.windows.com/buildingapps/2015/10/13/create-more-secure-apps-with-less-effort-10-by-10/#1tFDZeMtskOkOrvd.99阅读更多

很容易获取指纹。但我需要公钥。我在网上搜索，我发现了非常疯狂的代码，检查我不能使它工作。

有人能告诉我是否有一种简单的方法从Windows 10的证书中提取公钥?

问候。

var publicKey = certs[i].GetPublicKey();

byte[] publicKey = certs[i].GetPublicKey.EncodedKeyValue.RawData;