MongoDB ssl通过C#驱动程序:根据验证过程，远程证书无效

我正在尝试使用从C#客户端到MongoDB的X.509自签名证书来测试身份验证。我已经成功地在控制台窗口中使用ssl运行mongod，并使用mongo命令从另一个控制台窗口连接到它：

mongod --clusterAuthMode x509 --sslMode requireSSL --sslPEMKeyFile mongodb.pem --sslCAFile client.pem

mongo --ssl --sslCAFile mongodb.pem --sslPEMKeyFile client.pem

证书文件是按照这些说明生成的。

MongoDB驱动程序需要我生成的pfx文件：

openssl pkcs12 -export -in client.pem -inkey client-cert.key -out client.pfx

实际代码如下：

    private static void TryConnect()
    {
        var cert = new X509Certificate2(@"C:'Program Files'MongoDB'Server'3.2'bin'client.pfx", "test");
        var settings = new MongoClientSettings
        {
            Credentials = new[]
            {
                MongoCredential.CreateMongoX509Credential("subject= emailAddress=test@test.com,CN=127.0.0.1,OU=Test,O=Test,L=Cph,C=DK")
            },
            SslSettings = new SslSettings
            {
                ClientCertificates = new[] { cert },
            },
            UseSsl = true
        };
        settings.Server = new MongoServerAddress("127.0.0.1");            
        MongoClient client = new MongoClient(settings);
        var db = client.GetServer().GetDatabase("test");
        db.CreateCollection("test");           
    }

最后一行抛出异常：无法连接到服务器127.0.0.1:27017:根据验证过程，远程证书无效

有人知道怎么做吗？

 settings.SslSettings = new SslSettings
        {
            ClientCertificates = new[] { cert },
            ServerCertificateValidationCallback = delegate (object s, X509Certificate certificate, X509Chain chain, SslPolicyErrors sslPolicyErrors)
            {
                foreach (var item in chain.ChainElements)
                {
                    foreach (var elemStatus in item.ChainElementStatus)
                    {
                        Console.WriteLine( item.Certificate.Subject + "->" + elemStatus.StatusInformation);
                    }
                }
                return true; //NOT FOR PRODUCTION: this line will bypass certificate errors.
            }
       }