使用过滤取结果集

CREATE TABLE [Chapter13].[Account](
    [AccountId] [int] IDENTITY(1,1) primary key,
    [Name] [varchar](50) NOT NULL,
    [Balance] [decimal](18, 2) NOT NULL)
GO

 static void Main(string[] args)
        {
            using (var context = new EF6RecipesEntities())
            {
                context.Database.ExecuteSqlCommand(@"insert into chapter2.account
(DeletedOn,AccountHolderId) values (‘2/10/2009‘,1728)");
                var account = new Account { AccountHolderId = 2320 };
                context.Accounts.Add(account);
                account = new Account { AccountHolderId = 2502 };
                context.Accounts.Add(account);
                account = new Account { AccountHolderId = 2603 };
                context.Accounts.Add(account);
                context.SaveChanges();
            }
            using (var context = new EF6RecipesEntities())
            {
                foreach (var account in context.Accounts)
                {
                    Console.WriteLine("Account Id = {0}",
                        account.AccountHolderId.ToString());
                }
            }

            Console.ReadKey();
        }