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//Rextester.Program.Main is the entry point for your code. Don't change it. //Compiler version 4.0.30319.17929 for Microsoft (R) .NET Framework 4.5 using System; using System.Collections.Generic; using System.Linq; using System.Text.RegularExpressions; namespace Rextester { public class Program { public static void Main(string[] args) { string test1 = "&"; string test2 = "&&&&&&&&&&"; string test3 = "&&&&&&&u&&&&&&&"; var test4 = "foo&"; var regex = new Regex("^[&]+$"); Console.WriteLine(regex.IsMatch(test1)); Console.WriteLine(regex.IsMatch(test2)); Console.WriteLine(regex.IsMatch(test3)); Console.WriteLine(regex.IsMatch(test4)); } } }
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Compilation time: 0,34 sec, absolute running time: 0,39 sec, cpu time: 0,38 sec, average memory usage: 18 Mb, average nr of threads: 4
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