PrivateKey = new CX509PrivateKey()
                  {

                      ProviderName = CSP,
                      KeySpec = X509KeySpec.XCN_AT_KEYEXCHANGE,
                      //Length = 512,
                      MachineContext = false,
                      KeyUsage = X509PrivateKeyUsageFlags.XCN_NCRYPT_ALLOW_ALL_USAGES,
                      Existing = false,
                  };

            if (containername.Length != 0) { PrivateKey.ContainerName = containername; }
           
            if (containername.Contains("exportable")) { PrivateKey.ExportPolicy = X509PrivateKeyExportFlags.XCN_NCRYPT_ALLOW_EXPORT_FLAG; }
            else { PrivateKey.ExportPolicy = X509PrivateKeyExportFlags.XCN_NCRYPT_ALLOW_EXPORT_NONE; }
        

            if (PrivateKey.ProviderName == "Crypto-Pro GOST R 34.10-2012 Cryptographic Service Provider") {
                PrivateKey.Length = 512;
                PrivateKey.ProviderType = (X509ProviderType)80;
            }
            if (PrivateKey.ProviderName == "Infotecs GOST 2012/512 Cryptographic Service Provider") {
                PrivateKey.Length = 512;
                PrivateKey.ProviderType = (X509ProviderType)77;
            }