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  1. using System;
  2. using System.Collections.Generic;
  3. using System.IO;
  4. using System.Linq;
  5. using System.Text.RegularExpressions;
  6.  
  7. public class Test
  8. {
  9. 	public static void Main()
  10. 	{
  11. 		var strs = new List<string> { "PassWord", "PAssword", "PASSWord"};
  12. 		var n = 2;
  13.     	var pat = $@"^(?:[^A-Z]*[A-Z]){{{n}}}[^A-Z]*$";
  14.     	foreach (var s in strs) {
  15. 			Console.WriteLine("{0}: {1}", s, Regex.IsMatch(s, pat));
  16.     	}
  17. 	}
  18. }
Success #stdin #stdout 0.04s 134848KB
comments ()
stdin
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Standard input is empty
stdout
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PassWord: True
PAssword: True
PASSWord: False
https://ideone.com/TtHGSE
language:
C# (gmcs 5.20.1)
created:
7 years ago
visibility:
secret

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