Alex Rivera | Logout

List<T> concurrent removing and adding

Asked 2009-11-28T19:40:35.613
14

I am not too sure, so i thought i'd ask. Would removing and adding items to a System.Collections.Generic.List<> object be non-thread safe?

My situation:

When a connection is received, it is added to the list, but also at the same time, there's a worker that's removing dead connections and such.

Is there a problem? Will a lock do? I also want to know if i'm allowed to use a lock on the list object with it's Foreach<> method.

c# .net list concurrency
Edit
Report

1 Answer

2

List<T> is not thread-safe, so yes, you will need to control access to the list with a lock. If you have multiple threads accessing the List make sure you have them all respect the lock or you will have issues. The best way to do this would to be to subclass the List so that the locking happens automatically, else you will more than likely end up forgetting eventually.

answered 2009-11-28T19:43:07.693

Your Answer