使用过载这需要现有的目标：

Use the overload that takes the existing destination:

Mapper.Map<Source, Destination>(source, destination);

是的，它会返回目标对象，但这只是一些模糊的其他情形。这是同一个对象。

Yes, it returns the destination object, but that's just for some other obscure scenarios. It's the same object.