C#读文件操作

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using System;using System.IO;namespace IO操作{    class Program    {        private const string FILE_NAME="IO.txt";        static void Main(string[] args)        {            if (!File.Exists(FILE_NAME))            {                Console.WriteLine("{0}does not exists!",FILE_NAME);                Console.ReadLine();                return;            }            //方法一：            //FileStream FS = new FileStream(FILE_NAME, FileMode.Open, FileAccess.Read);            //BinaryReader BR = new BinaryReader(FS);            //for (int i = 0; i < 1; i++)            //{            //    Console.WriteLine(BR.ReadString());            //}            //BR.Close();            //FS.Close();            //Console.ReadLine();            //方法一：            using (StreamReader SR = File.OpenText(FILE_NAME))            {                string input;                while ((input = SR.ReadLine()) != null)                {                    Console.WriteLine(input);                }                Console.WriteLine("The end of the txt");                Console.ReadLine();                SR.Close();            }        }    }}
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