C#实现单词本功能

using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Linq;using System.Text;using System.Windows.Forms;using System.IO;  namespace WindowsFormsApp6{ public partial class Form1 : Form {  public Form1()  {   InitializeComponent();  }   private void button2_Click(object sender, EventArgs e)  {   textBox1.Clear();//每点击一次选择文件按钮自动清空文本框内已经打开的文件内容   textBox2.Clear();//清空文件路径的内容   OpenFileDialog filename = new OpenFileDialog();//定义打开文件   filename.InitialDirectory = Application.StartupPath;//初始路径   filename.Filter = "文本文件(*.txt)|*.txt|所有文件(*.*)|*.*";//设置打开文件的类型   filename.FilterIndex = 2;//设置文件类型的显示顺序      if (filename.ShowDialog() == DialogResult.OK)   {    textBox2.Text = filename.FileName.ToString();//将路径显示在文本框    StreamReader sr = new StreamReader(filename.FileName, Encoding.Default);    //将文件通过stream流读取    string content = sr.ReadToEnd();//把文件读完存给content    string[] lines = content.Split('/n');//将文件内容分割成一行一行存给数组    for (int i = 0; i < lines.Length; i++)    {      textBox1.Text += lines[i++]+"/n";       //List<string> english = new List<string>();     //List<string> chinese = new List<string>();     //string[] words = lines[i].Trim().Split('/t');     //if (words.Length < 2)     //continue;     //english.Add(words[0]);     //chinese.Add(words[1]);          }      sr.Close();   }  }   private void button1_Click(object sender, EventArgs e)  {   textBox1.Clear();//此处点击返回按钮同样自动清空文本框文件内容   textBox2.Clear();//清除文件路径内容  } }}