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  1. using System;
  2. using System.Text.RegularExpressions;
  3.  
  4. class Demo {
  5.     public static void Main()
  6.     {
  7.         Regex re = new Regex(@"^[-a-z0-9_@]{3,15}$");
  8.         Console.WriteLine(re.IsMatch("a_b"));
  9.         Console.WriteLine(re.IsMatch("abxyz1234567890"));
  10.         Console.WriteLine(re.IsMatch("a!!"));
  11.         Console.WriteLine(re.IsMatch("abxyz12345678901234"));
  12.     }
  13. }
  14.  
Success #stdin #stdout 0.06s 34080KB
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stdin
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Standard input is empty
stdout
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True
True
False
False
https://ideone.com/i24U3R
language:
C# (gmcs 5.20.1)
created:
11 years ago
visibility:
public

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