static int Quiz()
    {
        var QAndA = new QA[] {
            new QA {
                Q = "What is the capital of France", A = "Paris"
            },
            new QA {
                Q = "What is the capital of Spain", A = "Madrid"
            },
            //  ...
            new QA {
                Q = "What is the captial of Russia", A = "Moscow"
            },
            new QA {
                Q = "What is the capital of Ukraine", A = "Kiev"
            },
        };

        foreach (var qa in QAndA.OrderBy(i => _r.Next()))
        {
            Question(qa.Q, qa.A);
        }
        return(0);
    }