C# 如何知道智能卡上保留的pin码号码

我在唱一张智能卡和一个令牌，我有一个代码来检查他们的PIN码，但我想知道如果密码不正确，在被阻止之前仍然保留的PIN码的数目

这是我的代码：

public static bool IsValidPasswordForCertificate(X509Certificate2 certificate, string password)
{
   CspParameters csp = new CspParameters();

   try
   {
      RSACryptoServiceProvider rsaEncryptor = (RSACryptoServiceProvider)certificate.PrivateKey;
      csp.KeyContainerName = rsaEncryptor.CspKeyContainerInfo.KeyContainerName;
      csp.ProviderName = rsaEncryptor.CspKeyContainerInfo.ProviderName;
      csp.ProviderType = rsaEncryptor.CspKeyContainerInfo.ProviderType;
   }

   catch (Exception)
   {
      throw;
   }

   //Import the password to the csp details
   try
   {
      SecureString secure = new SecureString();
      foreach (char c in password)
         secure.AppendChar(c);
      csp.KeyPassword = secure;

   }

   catch (Exception)
   {
      throw;
   }

   //Try to import the csp and password details to the provider
   try
   {
      RSACryptoServiceProvider prov = new RSACryptoServiceProvider(csp);
   }

   catch (CryptographicException ex)
   {
      if (ex.Message.Contains("wrong PIN"))
         return false;
   }

   catch (Exception)
   {
      throw;
   }

   return true;
}

---

如果pin不正确，将抛出加密异常，并在此或之后，了解智能卡/令牌将被阻止之前pin的重试次数。

捕获（异常）{throw；}阻止的目的是什么？调试？只是为了捕捉任何其他调试异常