Difference between Barrier in C# 4.0 and WaitHandle in C# 3.0?

Question

I am picking up C# 4.0 and one of the things which is confusing me, is the barrier concept.

Is this not just like using the WaitAll method of WaitHandle

Answer 1

Seems like a counted waithandle to me. Gives you the convenience to say "when the number of threads waiting on this lock becomes X, let them all go." It's nothing you can't do with another construct, but it does seem convenient.