BitVector32 has a bug. Here's a good replacement
Historical article · Originally published November 12, 2003; technical details may be outdated.
Sebastian Lambla has created a replacement for the BitVector32 class in the framework. The original has a nasty bug in it : the indexer always returns false for bit #31. Sebastian decided he needed more flexibility from it anyway so he recreated it from scratch.
Very cool. Great work.
You can download the class in a zip file from his post.