kms Crypto AESDecrypter Decrypt Partial

AESDecrypter.cs

AmazonKeyManagementServiceClient kmsClient = new AmazonKeyManagementServiceClient();            

MemoryStream ciphertextBlob = new MemoryStream(Convert.FromBase64String((encryptionPackage.EncryptedKey)));

DecryptRequest decryptRequest = new DecryptRequest()
{
    CiphertextBlob = ciphertextBlob,
    KeyId = _keyId
};

DecryptResponse decryptResponse = await kmsClient.DecryptAsync(decryptRequest);

byte[] key = decryptResponse.Plaintext.ToArray();