Question

i want regex that only accept number format with closing and opening round brackets
format like this(091)(022)(2)(123-4567)

This i want to use in C#.

Answer 1

The regular expression I would use is this:

^(\([0-9-]+\))+$

This expression will match all of it, or nothing.

To test a string against the expression in C#, it would look something like this:

var str = "(091)(022)(2)(123-4567)";
var isMatch = Regex.IsMatch(str, @"^(\([0-9-]+\))+$");