public void TestGettingStudentsEnrolledInPaper()
        {
            Student s = new Student("A Student", 111, DateTime.ParseExact("20/10/1974", "dd/MM/yyyy", null));
            Paper   p = new Paper("Paper 101", 100101, "Paper Man");

            p.AddStudentToPaper(s);

            Dictionary <int, Student> expected = new Dictionary <int, Student> {
            };

            expected.Add(111, s);
            Dictionary <int, Student> actual = p.StudentsInPaper;

            CollectionAssert.AreEqual(expected, actual);
        }