C# 文件读写Helper类

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

 namespace PrintLableCode
 {
     class FileHelper
     {
         List<string> readList = null;
         /// <summary>
         /// 读取文件
         /// </summary>
         /// <param name="path"></param>
         /// <returns></returns>
         public List<string> readFiles(string path)
         {
             StreamReader reader = new StreamReader(path,Encoding.Default);
             string lines;
             while((lines=reader.ReadLine())!=null)
             {
                 readList.Add(lines.ToString());
             }
             return readList;
         }
         /// <summary>
         /// 文件写入
         /// </summary>
         /// <param name="path"></param>
         /// <param name="str"></param>
         public void writeFiles(string path,string str)
         {
             FileStream fs = new FileStream(path, FileMode.Append);
             StreamWriter sw = new StreamWriter(fs);
             sw.WriteLine(str);
             sw.Flush();
             sw.Close();
         }
     }
 }