c#读取文本并生成txt

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.IO;

namespace WindowsFormsApp2
{
    public partial class Form1 : Form
    {

        List<string> listTxt = new List<string>();
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            Read();
            Write();
        }

        byte[] byData = new byte[];
        char[] charData = new char[];
        public void Read()
        {
            StreamReader sr = new StreamReader(System.Environment.CurrentDirectory+"/"+"22.txt", Encoding.Default);
            String line;
            while ((line = sr.ReadLine()) != null)
            {
                string txt = line;
                txt = txt.Replace(@"\N{\fs14}", ";");
                string[] txtnew = txt.Split(';');
                if (txtnew.Length > )
                {
                    listTxt.Add(txtnew[]);
                    listTxt.Add(txtnew[]);
                }
                //Console.WriteLine(line.ToString());
            }
        }

        public void Write()
        {
            FileStream fs = new FileStream(System.Environment.CurrentDirectory+"/第1季第22集.txt", FileMode.Create);
            StreamWriter sw = new StreamWriter(fs);
            //开始写入
            foreach (var item in listTxt)
            {
                sw.WriteLine(item);
            }
            //清空缓冲区
            sw.Flush();
            //关闭流
            sw.Close();
            fs.Close();
        }
    }
}