BloomFilter.NET -- http://github.com/joeyrobert/bloomfilter Copyright (c) 2009 Joseph Robert. All rights reserved. BloomFilter.NET is an implementation of a bloom filter (see http://en.wikipedia.org/wiki/Bloom_filter). A bloom filter is a space-efficient probabilistic data structure that is used to test whether an element is a member of a set. False positives are possible, but false negatives are not. Elements can be added to the set, but not removed.