BloomFilter (nuget): A Bloom Filter is a probabalistic data structure that Implements the Add() and Contains() methods in a memory efficient manner when compared to the more traditional Hash Set. However, the Bloom Filter has some draw backs:  * It will sometimes indicate that an element is in the set when it isn't. The False Positive rate can be decreased by using more memory.  *The capacity of the Bloom Filter is fixed at creation time. (You can add more elements than the target capacity, but the False Positive rate continues to increase thereafter).
Keywords: Bloom|Filter|Set|Probabalistic|Data|Structure