Specialized Queues - A Cyclic Queue

I'ts been a while, but I hope I'll be able to keep a normal pace now (a blog post once every few days).
I've posted a new article on the CodeProject: Specialized Queues - A Cyclic Queue .
The idea is to provide a Queue with a limited buffer size. Once the buffer is full and new items are added, the 'oldest' items in the buffer are being dropped. I am using this article also to give a few tips about writing specialized collections in .NET.
Hope it will be useful...