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();
        }
    }
}