how to completely Hide website from search engines?

Whats the best recommended way yo hide my staging website from search engines, i Googled it and found some says that i should put a metatag, and some said that i should put a text file inside my website directory, i want to know the standard way.

my current website is in asp.net, while i believe that it must be a common way for any website whatever its programming language.

Solution

Use a robots.txt file.

see here http://www.robotstxt.org/robotstxt.html

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