Regex to match multiple strings

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If you can guarantee that there are no reserved regex characters in your word list (or if you escape them), you could just use this code to make a big word list into @"(a|big|word|list)". There’s nothing wrong with the | operator as you’re using it, as long as those () surround it. It sounds like the \w* and the \b patterns are what are interfering with your matches.

String[] pattern_list = whatever;
String regex = String.Format("({0})", String.Join("|", pattern_list));

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