以线程安全的方式添加到Parallel.ForEach循环中的列表

问题描述

在称为ListofObjects的obj对象列表上，我有一些类似的代码:

I have a bit of code that works like this on a list of obj objects called ListofObjects:

List<SomeObject> NewListofObjects<SomeObject>();

Parallel.ForEach(ListofObjects, obj =>

//Do some operations here on obj to get a newobj

NewListofObjects.Add(newobj);

);

现在我不在Parallel.ForEach循环中，我想对NewListofObjects进行操作.但是，尝试执行以下操作时会出现此错误:试图读取或写入受保护的内存.这通常表明其他内存已损坏".

Now I am out of the Parallel.ForEach loop, and I want to do an operation on NewListofObjects. However, I get this error when I try to: "Attempted to read or write protected memory. This is often an indication that other memory is corrupt".

这是因为我的NewListofObjects.Add(newobj)方法不是线程安全的吗?如果是这样，如何使它具有线程安全性?

Is this because my NewListofObjects.Add(newobj) method is not threadsafe? If so, how can I make it threadsafe?

推荐答案

正确.它不是线程安全的.

Correct. It is not threadsafe.

来自 MSDN ，指的是List<T>(滚动到标题为线程安全"的部分.)

That's from MSDN referring to List<T> (scroll to the section titled "Thread Safety").

使用并发集合，例如 ConcurrentBag<T> .请注意，您失去了跟踪项目插入顺序的能力.

Use a concurrent collection, like ConcurrentBag<T>. Note that you lose the ability to keep track of the order that items were inserted.

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