- using System; 
- using System.Text.RegularExpressions; 
- public class Test 
- { 
- 	public static void Main() 
- 	{ 
- 		Console.WriteLine( 
- 			Regex.Replace("fooFOOfOoFoOBARBARbarbarbAr", "(?i:foo)|BAR", "<$&>") 
- 		); 
- 	} 
- } 
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