Introduction - If you have any usage issues, please Google them yourself
Implementation of Apriori algorithm, using C#.
Apriori is a classic algorithm for learning association rules. Apriori is designed to operate on databases containing transactions (for example, collections of items bought by customers, or details of a website frequentation). Other algorithms are designed for finding association rules in data having no transactions (Winepi and Minepi), or having no timestamps (DNA sequencing).
Description of Apriori: http://en.wikipedia.org/wiki/Apriori_algorithm