操纵txt文本文件

txt文本文件（ticket.txt）的格式：
666666,Alfred Lv,Resigned,06/24/2010 02:13:30 PM ZE8
99999,Alfred Lv,Closed,06/24/2010 02:13:45 PM ZE8

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.IO;
using System.Text;

namespace WebApplication1
{
    class FileUtilitity
    {
        public Ticket[] ReadFile()
        {
            string filename = "D:\\Ticket.txt";
            string[] Tickets = new string[4];
            List<Ticket> ticket = new List<Ticket>();
         

         
            //打开文件并显示其内容 
            StreamReader reader = null;
            try
            {
                reader = new StreamReader(filename);
                for (string line = reader.ReadLine(); !String.IsNullOrEmpty(line); line = reader.ReadLine())
                {
                    Tickets = line.Split(',');
                    Ticket tmpTicket= new Ticket();
                    tmpTicket.TicketNo = Tickets[0];
                    tmpTicket.Author = Tickets[1];
                    tmpTicket.Status = Tickets[2];                    
                    tmpTicket.LastModified = Tickets[3];
                    ticket.Add(tmpTicket);                   
                }
            }
            catch (Exception e)
            {
                Console.WriteLine(e.Message);
            }
            finally
            {
                if (reader != null)
                    reader.Close();
            }
            return ticket.ToArray();
        }

        public void WriteFile(string s, string path)
        {
            FileStream fout = new FileStream(path, FileMode.Append, FileAccess.Write);
            StreamWriter brout = new StreamWriter(fout, Encoding.Default);
            brout.WriteLine(s);
            brout.Close();
        }
    }

    public class Ticket
    {
        public string TicketNo
        {
            get;
            set;
        }

        public string Status
        {
            get;
            set;
        }

        public string Author
        {
            get;
            set;
        }
        public string LastModified
        {
            get;
            set;
        }
    }
}