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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[] strings = { 
  9.             "%some_text%",
  10.             "%some[_]te_t[%]"
  11.             };
  12.  
  13.         foreach (String s in strings) {
  14.             var result = Regex.Replace(
  15.                 s, 
  16.                 @"\[([%_])\]|([%_])", match =>
  17.                 match.Groups[2].Success ? "*" : match.Groups[1].Value
  18.             );
  19.             Console.WriteLine(result);
  20.         }
  21. 	}
  22. }
Success #stdin #stdout 0.09s 21088KB
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stdin
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Standard input is empty
stdout
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*some*text*
*some_te*t%
https://ideone.com/KfNhep
language:
C# (gmcs 5.20.1)
created:
3 years ago
visibility:
public

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