regex to remove all text before a character

Question

Is there an easy way to remove all chars before a \"_\"? For example, change 3.04_somename.jpg to somename.jpg.

Any suggestions for where t

Answer 1

Variant of Tim's one, good only on some implementations of Regex: ^.*?_

var subjectString = "3.04_somename.jpg";
var resultString = Regex.Replace(subjectString,
    @"^   # Match start of string
    .*?   # Lazily match any character, trying to stop when the next condition becomes true
    _     # Match the underscore", "", RegexOptions.IgnorePatternWhitespace);