1 using System; 2 using System.Collections.Generic; 3 using System.Linq; 4 using System.ComponentModel; 5 using System.Data; 6 using System.Text; 7 using System.Threading.Tasks; 8 9 namespace EFDemo10 {11 class Program12 {13 static void Main(string[] args)14 {15 Order o = new Order() { Customer = "", OrderDate = DateTime.Now }; EFDemoDBContainer db = new EFDemoDBContainer();16 db.Orders.Add(o);17 int result = db.SaveChanges();18 19 var orders = from od in db.Orders select od;20 21 foreach (Order order2 in orders)22 {23 Console.WriteLine("OrderID:{0},OrderDate:{1}", order2.Id, order2.OrderDate);24 }25 26 Console.Read();27 }28 }29 }