C# Find a matching string by regex

Question

I want to find out, whether my string contains a text like #1, #a, #abc, #123, #abc123dsds and so on... (\'#\' character with one or more characters (digits and letters).

Answer 1

String.Contains does not accept a regex.

Use Regex.IsMatch:

var matches = Regex.IsMatch(test, "#.+");