private static void PerformDecrypt(CommandLineParameters parameters, EncryptionManager encryptionManager, System.IO.FileStream stream)
{
long amountToRead = stream.Length;
var encrypted = new byte[amountToRead ];
stream.Read(encrypted, 0, encrypted.Length);
var decrypted = encryptionManager.DecryptFromBytes(encrypted);
System.IO.File.WriteAllBytes(parameters.Destination, decrypted);
}
}