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  1. using System;
  2. using System.Text.RegularExpressions;
  3.  
  4. public class Test
  5. {
  6. public static void Main()
  7. {
  8. string ipv4 = @"\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}";
  9. string s = @"naieofnai555aedae192.168.1.1andaiodane";
  10.  
  11. Match m = Regex.Match(s, ipv4);
  12. if (m.Success)
  13. {
  14. Console.WriteLine("IP encontrado: {0}", m.Value);
  15. }
  16. }
  17. }
Success #stdin #stdout 0.03s 134720KB
stdin
Standard input is empty
stdout
IP encontrado: 192.168.1.1