using System;

using PCRE;

public class Program

{

    public static void Main()

    {

        var regex = new PcreRegex("[\\w]*[CA]X*B", new PcreRegexSettings() {

            Options = PcreOptions.Compiled

        });

​

        Console.WriteLine(regex.Match("ABC").Success.ToString());

        var regex2 = new PcreRegex("[\\w]*[CA]X*B", new PcreRegexSettings() {

            Options = PcreOptions.None

        });

​

        Console.WriteLine(regex2.Match("ABC").Success);

    }

}