ef 事务

     using (var context = new FcityDB２Entities())
            {
                using (var trasaction = context.Database.BeginTransaction())
                {
                    try
                    {
                        TestEF t = new TestEF();
                        t.username = "conan";
                        t.age = 101;
                        t.birthday = System.DateTime.Now;
                        context.Set<TestEF>().Add(t);
                        context.SaveChanges();

                        TestEF t2 = new TestEF();
                        t2.username = "conan";
                        t2.age = 101;
                        t2.birthday = System.DateTime.Now;
                        context.Set<TestEF>().Add(t2);
                        context.SaveChanges();
                        trasaction.Commit();
                    }
                    catch
                    {
                        trasaction.Rollback();
                    }
                }
            }