How unique is ManagedThreadID?

Question

For ManagedThreadID, MSDN says:

Gets a unique identifier for the current managed thread.

In what context does \"unique\" apply?

Answer 1

Since threads from the ThreadPool also have to honour this property, and there is one ThreadPool per process (as stated in this MSDN article), I would think that the ManagedThreadId is most likely unique per process.

Answer 2

Thread ID is unique per process during a thread's lifecycle. After the thread terminates, its number can be reused.