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  1. using System;
  2. using System.Text.RegularExpressions;
  3. public class Test
  4. {
  5. 	public static void Main()
  6. 	{
  7. 		 string text = "UserFirstName";
  8. 		 int SkipIndex = 5;
  9. 		 string pattern = $@"(?!^)(?<!^.{{{SkipIndex-1}}}).";
  10. 		 Console.WriteLine(Regex.Replace(text, pattern, "*"));
  11.  
  12. 	}
  13. }
Success #stdin #stdout 0.06s 21252KB
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stdin
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Standard input is empty
stdout
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U***F********
https://ideone.com/onIg3H
language:
C# (gmcs 5.20.1)
created:
4 years ago
visibility:
public

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