可以做到这一点只需使用的设置逻辑。 C＃在 HashSet的：

You can achieve this simply using Set logic. C# has a nice implementation in the form of HashSet:

var set = new HashSet<OtherObject>(myObjects.SelectMany(mo => mo.ObjectList));

或者，如果你愿意延迟执行，你可以使用LINQ的Distinct 方式：

var distinct = myObjects.SelectMany(mo => mo.ObjectList).Distinct();