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[.net] Regular Expression Problem

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I am using the following code to validate a uk 11 digit phone number. Regex expression=new Regex("/^([0-9]{11})$/"); Match m=expression.Match("12345678901"); if(m.Success==true) { return true; } else { return false; } this is not working though. Is this correct?

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Becase regular expressions were first commonly used (IIRC) in sed, which bracketed them in slashes. Later, Perl (which is a common consumer of regexes) did the same by default.

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