What is the basic concept behind WaitHandle?

Question

What is the basic concept behind WaitHandle in C# .net threading? Whats is its use? When to use it? What is the use of WaitAll and Wait

Answer 1

There are some very long answers here. For anyone looking for the short answer:

Wait handle are a mechanism for making one thread wait until another thread reaches a certain point.

You can also have several threads waiting and/or several threads that are being waited for, hence the WaitOne, WaitAll and WaitAny methods. There are also several options for semantics available by choosing one of these classes: Mutex, Semaphore, ManualResetEvent, AutoResetEvent which are well documented.