Working with Credit Card Validation & Algorighm

Here is some link that will show how to work with Credit Card Validation and how to implement algorithm for that.

(1) Credit card number - Wikipedia, the free encyclopedia

(2) Luhn algorithm - Wikipedia, the free encyclopedia

(3) Credit Card Validation (Luhn Algorithm) - ASP – Snipplr

(4) Credit Card Validation in C#

(5) CodeProject: Credit Card Validator control for ASP.NET. Free source code and programming help

(6) CodeGuru: E-Commerce Tip: Programmatically Validate Credit Card Numbers

(7) SQL Server Forums - Luhn algorithm