using System;

using System.ComponentModel.DataAnnotations;

using System.Text.RegularExpressions;

public class Program

{

    public static void Main()

    {

        const string strRegex = @"^\w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*$";

        var re = new Regex(strRegex);

        Console.WriteLine(System.IO.Path.Combine("\\\\prod-fileserver.infotrack.co.uk\\infotrack-fileserver-uk-live\\Attachment", "2258000", "2258836", 

                                                 "C:\\Users\\JayWong\\Zhong Lun Law\\OneDrive - Zhong Lun Law\\Desktop\\completion\\4501 Pan Peninsula\\Title Pack\\Official Copy (Title Plan) - AGL429927 - Flat 1, Level 45, 3 Pan Peninsula Square E14 9HR.PDF"));

    }

}