[Test]
        public void TestStudentID_ToThrowIndexOutOfRangeException_IfIdIsLessThan10000()
        {
            Student student = new Student("Petko", 22256);

            Assert.Throws<IndexOutOfRangeException>(() => student.ID = 8990);
        }

        [Test]
        public void TestStudentID_ToThrowIndexOutOfRangeException_IfIdIsBiggerThan99999()
        {
            Student student = new Student("Maria", 44556);

            Assert.Throws<IndexOutOfRangeException>(() => student.ID = 100000);
        }