You can use the Random class, however, you are bound to have duplicate ids since the random is just that, random.
I would suggest using an auto number from a database as your recipet number.
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Read this if you want to know how to get a correct reply for your question:
http://www.catb.org/~esr/faqs/smart-questions.html
^^Took that from planoie's profile^^
^^Modified text taken from gbianchi profile^^
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Technical Editor for:
Professional Search Engine Optimization with ASP.NET
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Why can't Programmers, program??
http://www.codinghorror.com/blog/archives/000781.html
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