static void Main(string[] args) { using (var db = new SchoolDbContext()) //add data to database { db.Database.EnsureDeleted(); db.Database.EnsureCreated(); //I know I should have made these lists but everytime I make one it thows an error "The entity type 'List<Course>' was not found. Ensure that the entity type has been added to the model." //courses Course English = new Course { CourseName = "English" }; Course Math = new Course { CourseName = "Math" }; db.Add(English); db.Add(Math); //students Student Kevin = new Student { FirstName = "Kevin", LastName = "Shmittywormenyagermanjenson" }; db.Add(Kevin); Student Suzy = new Student { FirstName = "Suzy", LastName = "Q" }; db.Add(Suzy); Student Tai = new Student { FirstName = "Tai", LastName = "Lung" }; db.Add(Tai); Student Jaden = new Student { FirstName = "Jaden", LastName = "Smith" }; db.Add(Jaden); db.SaveChanges(); StudentCourse Link1 = new StudentCourse { Student = Kevin, Course = English, GPA = 2.4 }; db.Add(Link1); StudentCourse Link2 = new StudentCourse { Student = Suzy, Course = English, GPA = 3.2 }; db.Add(Link2); StudentCourse Link3 = new StudentCourse { Student = Tai, Course = English, GPA = .6 }; db.Add(Link3); StudentCourse Link4 = new StudentCourse { Student = Suzy, Course = Math, GPA = 1.7 }; db.Add(Link4); StudentCourse Link5 = new StudentCourse { Student = Jaden, Course = Math, GPA = 2.2 }; db.Add(Link5); db.SaveChanges(); List(); db.Remove(Link3); //remove a student from a course db.SaveChanges(); List(); //Add a transfer student to the roll Student Antonio = new Student { FirstName = "Antonio", LastName = "Montoya" }; db.Add(Antonio); StudentCourse LinkAntonio = new StudentCourse { Student = Antonio, Course = Math, GPA = 3.2 }; db.Add(LinkAntonio); db.SaveChanges(); List(); } }