.net3.5新特性
var expensiveInStockProducts =
from p in products //要筛选的对象原
where p.UnitsInStock > 0 && p.UnitPrice > 3.00M //筛选满足条件的对象
select p; //返回的对象
from p in products //要筛选的对象原
where p.UnitsInStock > 0 && p.UnitPrice > 3.00M //筛选满足条件的对象
select p; //返回的对象