使用linq,如何从另一个IEnumerable的属性创建IEnumerable<>

var peoplesDogs = people.SelectMany(p => p.Dogs);

var peoplesDogs = from p in people 
                  from d in p.Dogs
                  select d;

var peopleDogs = people.Select(p => p.Dogs)

编辑

IEnumerable<IEnumerable<Dog>> 但显然我们需要的只是 IEnumerable<Dog>

正如卢卡的回答,你需要使用 SelectMany 要展平:

var peopleDogs = people.SelectMany(p => p.Dogs)

你也可以

var peoplesDogs = from p in people
                  from d in p.Dogs
                  select d;

var peoplesDogs = people.SelectMany(p => p.Dogs)