public void GetFirstCohortWith2JuniorInstructors()
        {
            var ActualCohort = PracticeData.FirstOrDefault(c => c.JuniorInstructors.Count() == 2);

            Assert.AreEqual(ActualCohort, CohortBuilder.Cohort1);
        }
        [TestMethod]//??
        public void GetFirstCohortWithInstructorNamedZeldaOrNull()
        {
            var ActualCohort = PracticeData.FirstOrDefault(c => c.PrimaryInstructor.FirstName.ToLower() == "zelda" || c.JuniorInstructors.Any(ji => ji.FirstName.ToLower() == "zelda"));

            Assert.IsNull(ActualCohort);
        }
        public void GetFirstCohortThatIsFullTimeAndPrimaryInstructorBirthdayInTheFuture()
        {
            var ActualCohort = PracticeData.FirstOrDefault(c => c.FullTime && c.PrimaryInstructor.Birthday > DateTime.Today);

            Assert.AreEqual(ActualCohort, CohortBuilder.Cohort2);
        }
        public void GetFirstCohortWherePrimaryInstructorIsKate()
        {
            var ActualCohort = PracticeData.FirstOrDefault(c => c.PrimaryInstructor.FirstName.ToLower() == "kate");

            Assert.AreEqual(ActualCohort, CohortBuilder.Cohort4);
        }
        public void GetFirstCohortWithInstructorNamedZeldaOrNull()
        {
            var ActualCohort = PracticeData.FirstOrDefault(c => { return(c.PrimaryInstructor.FirstName == "Zelda"); });

            Assert.IsNull(ActualCohort);
        }
        public void GetFirstCohortWithInstructorNamedZeldaOrNull()
        {
            var ActualCohort = PracticeData.FirstOrDefault(cohort => cohort.PrimaryInstructor.FirstName == "Zelda"); /*FILL IN LINQ EXPRESSION*/;

            Assert.IsNull(ActualCohort);
        }