错误：请求已中止：无法创建 SSL/TLS 安全通道

问：

.NET 版本为 4.6.2，正在使用的 VaultSharp 包版本为 VaultSharp.1.4.0.1

法典：

ServicePointManager.Expect100Continue = true;
ServicePointManager.SecurityProtocol = SecurityProtocolType.Ssl3 | 
                                       SecurityProtocolType.Tls12 |
                                       SecurityProtocolType.Tls11 |
                                       SecurityProtocolType.Tls | (SecurityProtocolType)3072 | 
                                       (SecurityProtocolType)768 | 
                                       (SecurityProtocolType)192;  ;

string certificatePath = "cert.pfx";
string secretServerAddress = "https://vaultHotName:443";
var certificate = new X509Certificate2(certificatePath, "Password", X509KeyStorageFlags.Exportable | X509KeyStorageFlags.PersistKeySet);


HttpClient httpClient = null;
IVaultClient vaultClient = null;
bool enableProxy = true;
if (enableProxy)
{
    HttpClientHandler handler = new HttpClientHandler
    {
        Proxy = new WebProxy("proxyHostName", "443"),
        UseProxy = true
    };
    httpClient = new HttpClient(handler);
}

IAuthMethodInfo authMethod = new CertAuthMethodInfo(clientCertificate: certificate, roleName: vaultRole);
var vaultClientSettings = new VaultClientSettings(secretServerAddress, authMethod);
if (httpClient == null){
    vaultClient = new VaultClient(vaultClientSettings);
}
else
{
    vaultClient = new VaultClient(vaultClientSettings, httpClient);
}
var vaultClientRequired = vaultClient;
secretFullPath = "RandomPath"
Task<Secret<Dictionary<string, object>>> fetchSecretTask = vaultClientRequired.V1.Secrets.KeyValue.V1
                    .ReadSecretAsync(path: secretFullPath);

错误：System.Net.Http.HttpRequestException: An error occurred while sending the request. ---> System.Net.WebException: The request was aborted: Could not create SSL/TLS secure channel.

堆栈跟踪：

-> (Inner Exception #0) System.Net.Http.HttpRequestException: An error occurred while sending the request. ---> System.Net.WebException: The request was aborted: Could not create SSL/TLS secure channel.
   at System.Net.HttpWebRequest.EndGetRequestStream(IAsyncResult asyncResult, TransportContext& context)
   at System.Net.Http.HttpClientHandler.GetRequestStreamCallback(IAsyncResult ar)
   --- End of inner exception stack trace ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Net.Http.HttpClient.<FinishSendAsyncBuffered>d__58.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at VaultSharp.Core.Polymath.<MakeRequestAsync>d__16`1.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at VaultSharp.Core.Polymath.<MakeVaultApiRequest>d__14`1.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at VaultSharp.V1.AuthMethods.Cert.CertAuthMethodLoginProvider.<GetVaultTokenAsync>d__3.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at VaultSharp.Core.Polymath.<MakeVaultApiRequest>d__14`1.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at VaultSharp.V1.SecretsEngines.KeyValue.V1.KeyValueSecretsEngineV1Provider.<ReadSecretAsync>d__3`1.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at VaultSharp.V1.SecretsEngines.KeyValue.V1.KeyValueSecretsEngineV1Provider.<ReadSecretAsync>d__2.MoveNext()<---

调试详细信息

1. 我试图点击Vault从C#代码中读取机密，但它向我显示此错误。我已经尝试了互联网上能找到的任何东西，但我仍然处于同样的状态。

2. 因此，它应该成功读取机密。

3. 此代码在本地工作正常，但在 QA/Prod 上则不然。

4. 此代码通过 curl 命令成功工作。使用 C# 代码，我看到错误。