using System;

using System.Linq;

using System.Collections.Generic;

using System.Xml;

using System.Xml.Linq;

using System.Text.RegularExpressions;

​

public class Program

{

    public static void Main()

    {

        Action<string, string> check = (string input, string pattern) => Console.WriteLine("{0} '{1}' '{2}'", Regex.IsMatch(input, pattern), input, pattern);

        check("^created$", "created");

        check("^created$", "created ");

        check("^created$", " created");

        check("^savedOnServerTime$", "savedOnServerTime");

        check("^savedOnServerTime$", "savedOnServerTime ");

        check("^savedOnServerTime$", " savedOnServerTime");

        check("^created$|^savedOnServerTime$", "created");

        check("^created$|^savedOnServerTime$", " created");

        check("^created$|^savedOnServerTime$", "created ");

        check("^created$|^savedOnServerTime$", "savedOnServerTime");

        check("^created$|^savedOnServerTime$", " savedOnServerTime");

        check("^created$|^savedOnServerTime$", "savedOnServerTime ");

    }

}