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  1. using System;
  2. using System.Text.RegularExpressions;
  3.  
  4. public class Example
  5. {
  6.     public static void Main()
  7.     {
  8.         string[] strings = {
  9.             "ABC123",
  10.             "ABC245", 
  11.             "ABC435",
  12.             "ABC Oh say can You see"
  13.         };
  14.         string pattern = "ABC(?!123)";
  15.         foreach (string str in strings)
  16.         {
  17.             Console.WriteLine(
  18.                 "\"{0}\" {1} match.", 
  19.                 str, Regex.IsMatch(str, pattern) ? "does" : "does not"
  20.             );
  21.         }
  22.     }
  23. }
Success #stdin #stdout 0.06s 34816KB
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stdin
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Standard input is empty
stdout
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"ABC123" does not match.
"ABC245" does match.
"ABC435" does match.
"ABC Oh say can You see" does match.
https://ideone.com/wQ7pMD
language:
C# (gmcs 5.20.1)
created:
12 years ago
visibility:
public

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