迭代时从另一个线程修改列表(C#) [英] Modifying list from another thread while iterating (C#)

问题描述

我正在用foreach遍历元素列表，像这样:

I'm looping through a List of elements with foreach, like this:

foreach (Type name in aList) {
   name.doSomething();
}

但是，在另一个线程中，我正在调用类似的东西

However, in an another thread I am calling something like

aList.Remove(Element);

在运行时，这将导致InvalidOperationException:集合已被修改；枚举操作可能无法执行.最好的处理方法是什么(即使以性能为代价，我也认为它很简单)?

During runtime, this causes an InvalidOperationException: Collection was modified; enumeration operation may not execute. What is the best way to handle this (I would perfer it to be rather simple even at the cost of performance)?

谢谢！

推荐答案

线程A:

lock (aList) {
  foreach (Type name in aList) {
     name.doSomething();
  }
}

线程B:

lock (aList) {
  aList.Remove(Element);
}

这当然对性能不利.

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