Thread.Sleep(0) doesn't work as described?

Question

I am currently reading this excellent article on threading and read the following text:

Thread.Sleep(0) relinquishes the thread’s current time slice i

Answer 1

The next thread the processor handles is random thread and it even could be the same thread you just called Thread.Sleep(0). To ensure that next thread will be not the same thread you can call Thread.Yield() and check it's return result - if os has another thread that can run true will be returned else false.