class1.cs

C#开发教程 由浅入深 配有实例 是初学者的好帮手

using System;
using System.IO;

namespace ReadWrite
{
    public class ReadWriteApp
    {
        [STAThread]
        public static void Main(string[] args)
        {
            FileStream s = 
                new FileStream("Bar.txt", FileMode.Create);
//          StreamWriter w = new StreamWriter(s);
            StreamWriter w = new StreamWriter(
                s, System.Text.Encoding.BigEndianUnicode);
            w.Write("Hello World");
            w.Close();

            s = new FileStream("Bar.txt", FileMode.Open);
            StreamReader r = new StreamReader(s);
            string t;
            while ((t = r.ReadLine()) != null)
            {
                Console.WriteLine(t);
            }
            w.Close();

            s = new FileStream(
//              "C:\\temp\\Goo.txt", FileMode.Create);
//              "C:/temp/Goo.txt", FileMode.Create);
                @"C:\temp\Goo.txt", FileMode.Create);
            w = new StreamWriter(s);
            w.Write("Goodnight Ladies");
            w.Close();
            s = new FileStream(@"C:\temp\Goo.txt", FileMode.Open);
            r = new StreamReader(s);
            while ((t = r.ReadLine()) != null)
                Console.WriteLine(t);
            w.Close();

            // open a readonly file
            s = new FileStream(
                "../../TextFile1.txt", 
                FileMode.Open, FileAccess.Read);
        }
    }
}