public CKR C_EX_LoadActivationKey(NativeULong session, byte[] key)
        {
            if (_disposed)
                throw new ObjectDisposedException(GetType().FullName);

            NativeULong keyLength = 0;
            if (key != null)
                keyLength = (NativeULong)(key.Length);

            NativeULong rv = _rutokenDelegates.C_EX_LoadActivationKey(session, key, keyLength);

            return (CKR)rv;
        }