static void Main(string[] args)
    {
        string       rootFilePath = @"C:\test\";
        ResponseBase result1      = MethodToDeserializeToBeWritten <OldXML>(File.ReadAllText($"{rootFilePath}oldXML.xml"));
        ResponseBase result2      = MethodToDeserializeToBeWritten <NewXML>(File.ReadAllText($"{rootFilePath}newXML.xml"));

        result1.PrintResult();
        result2.PrintResult();
    }