I have a global List<T> object that is being populated by a long running task from one thread. In another thread, I need to periodically check this List (say every 30 seconds, for example) and if there are items, I need to take the first 10,000 (for example) and do something with this and remove those from the original list, all while the first thread is still writing to it.

​

Is this possible? Is there a threadsafe version of the List<T>?