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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. 		var pattern = @"^(?:[^_]+_){2}(\d+)"; 
  9. 		var text = "XXXXX_20160207_20180208_XXXXXXX_20190408T160742_xxxxx";
  10. 	    var result = Regex.Match(text, pattern)?.Groups[1].Value;
  11. 	    Console.WriteLine(result);
  12. 	}
  13. }
Success #stdin #stdout 0.06s 21116KB
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Standard input is empty
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20180208
https://ideone.com/1iTG4J
language:
C# (gmcs 5.20.1)
created:
5 years ago
visibility:
secret

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