public void GetGradesByStudentIdTest()
        {
            CrossTable cross = new CrossTable();

            var expected = "test";

            var actual = cross.GetGradesByStudentId(2);

            //Assert.AreEqual(expected, actual.First().EvaluationType);
        }
        public IHttpActionResult GetGradesByStudentId(int id)
        {
            var grades = cross.GetGradesByStudentId(id);

            if (!grades.Any())
            {
                return(Content(HttpStatusCode.NotFound, "List is empty"));
            }

            return(Ok(grades));
        }