public static string GetProductCode(LicenseProduct product, LicenseUtility.ProductCode type)
    {
      switch (type)
      {
        case LicenseUtility.ProductCode.MachineGuid:
          string str1 = (string) null;
          using (RegistryKey registryKey1 = RegistryKey.OpenBaseKey(RegistryHive.LocalMachine, (RegistryView) 256))
          {
            using (RegistryKey registryKey2 = registryKey1.OpenSubKey("SOFTWARE\\Microsoft\\Cryptography", RegistryKeyPermissionCheck.ReadSubTree))
            {
              using (RegistryKey registryKey3 = RegistryKey.OpenBaseKey(RegistryHive.LocalMachine, (RegistryView) 512))
              {
                using (RegistryKey registryKey4 = registryKey3.OpenSubKey("SOFTWARE\\Microsoft\\Cryptography", RegistryKeyPermissionCheck.ReadSubTree))
                {
                  if (registryKey4 != null)
                  {
                    str1 = registryKey4.GetValue("MachineGuid", (object) "default").ToString();
                    registryKey4.Close();
                  }
                  if ((str1 == null || str1 == "default") && registryKey2 != null)
                  {
                    str1 = registryKey2.GetValue("MachineGuid", (object) "default").ToString();
                    registryKey2.Close();
                  }
                  registryKey1?.Close();
                  registryKey3?.Close();
                }
              }
            }
          }
          if (str1 != null && str1 != "default")
            return LicenseUtility.GetProductCode(product, LicenseUtility.GetHash(str1));
          throw new Exception("MachineGuid is empty");
        case LicenseUtility.ProductCode.ProductId:
          string str2 = (string) null;
          using (RegistryKey registryKey1 = RegistryKey.OpenBaseKey(RegistryHive.LocalMachine, (RegistryView) 256))
          {
            using (RegistryKey registryKey2 = registryKey1.OpenSubKey("SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion", RegistryKeyPermissionCheck.ReadSubTree))
            {
              using (RegistryKey registryKey3 = RegistryKey.OpenBaseKey(RegistryHive.LocalMachine, (RegistryView) 512))
              {
                using (RegistryKey registryKey4 = registryKey3.OpenSubKey("SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion", RegistryKeyPermissionCheck.ReadSubTree))
                {
                  if (registryKey4 != null)
                  {
                    str2 = registryKey4.GetValue("MachineGuid", (object) "default").ToString();
                    registryKey4.Close();
                  }
                  if ((str2 == null || str2 == "default") && registryKey2 != null)
                  {
                    str2 = registryKey2.GetValue("MachineGuid", (object) "default").ToString();
                    registryKey2.Close();
                  }
                  registryKey1?.Close();
                  registryKey3?.Close();
                }
              }
            }
          }
          if (str2 != null && str2 != "default")
            return LicenseUtility.GetProductCode(product, LicenseUtility.GetHash(str2));
          throw new Exception("ProductId is empty");
        default:
          return LicenseUtility.GetProductCode(product, FingerPrint.Value());
      }
    }