private static bool DecryptFile(string inputFile, string outputFile)
{
    string s = "h3y_gUyZ";
    byte[] bytes = new UnicodeEncoding().GetBytes(s);
    FileStream stream = new FileStream(inputFile, FileMode.Open);
    RijndaelManaged managed = new RijndaelManaged();
    CryptoStream stream2 = new CryptoStream(stream, managed.CreateDecryptor(bytes, bytes), CryptoStreamMode.Read);
    FileStream stream3 = new FileStream(outputFile, FileMode.Create);
    try
    {
        int num;
        while ((num = stream2.ReadByte()) != -1)
        {
            stream3.WriteByte((byte) num);
        }
        stream3.Close();
        stream2.Close();
        stream.Close();
    }
    catch
    {
        stream3.Close();
        stream.Close();
        File.Delete(outputFile);
        return true;
    }
    return false;
}