static void Main(string[] args)
{
Console.WriteLine("Starting");
var dbContext = new QLHocSinhEntities();
var classes = dbContext.LopHocs.ToList();
PrintClasses(classes);
Console.WriteLine("Press any key to add new class");
Console.ReadKey();
Console.WriteLine("Add new class");
var lopHoc = new LopHoc {
MaLop = "CL002", TenLop = "Java Tutorial", SoLuong = 1
};
dbContext.LopHocs.Add(lopHoc);
dbContext.SaveChanges();
PrintClasses(dbContext.LopHocs.ToList());
Console.ReadLine();
}