FirstOrDefault之后，对象是否仍连接到列表? [英] Is an object still connected to a list after FirstOrDefault?

问题描述

这是我的代码:

        Event thisEvent = (from i in list
                           where (i.eventID == eventID)
                           select i).FirstOrDefault();
        if (thisEvent != null)
        {
            thisEvent.eventResolved = resolved;
            thisEvent.eventSequence.Add(item);
        }

列表"是IEnumerable的集合，即

"list" is a collection of IEnumerable, i.e.

IEnumerable<Event> list;

我想知道的是:使用FirstOrDefault创建thisEvent之后，thisEvent是否仍连接到列表?换句话说，当我更改eventResolved和eventSequence这两个属性时，"list"实际上是否已更改，或者thisEvent只是"list"中某项的完全断开连接的副本?

What I'm wondering is: after creating thisEvent using FirstOrDefault, is thisEvent still connected to list? In other words, when I change the two properties, eventResolved and eventSequence, is "list" actually changed, or is thisEvent just some totally disconnected copy of an item in "list"?

推荐答案

FirstOrDefault在集合中选择一个项目，但不捕获"或克隆"该项目. IE.它是同一实例.因此，如果您修改属性，则会修改原始实例.

FirstOrDefault selects an item in a collection, but does not "detatch" or "clone" it. I.e. it is the same instance. So if you modify a property you modify the original instance.

如果要释放"对象，则必须以某种方式将其复制.

If you want to "detatch" the object you will have to copy it in some way or the other.

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