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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 input = "Hello World!";
  12. 		var keyword = "Hello";
  13. 		var result = Regex.Replace(input, Regex.Escape(keyword), "<b>$&</b>");
  14. 		Console.WriteLine(result);
  15. 	}
  16. }
Success #stdin #stdout 0.03s 134592KB
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Standard input is empty
stdout
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<b>Hello</b> World!
https://ideone.com/iq0qN0
language:
C# (gmcs 5.20.1)
created:
6 years ago
visibility:
secret

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