StreamReader和StreamWrite操作文件

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

namespace _04Stream读写文件
{
    class Program
    {
        static void Main(string[] args)
        {
            string filePathr = @"E:\dotNet\Study\1.txt";
            StreamReader sr = new StreamReader(filePathr, Encoding.Default);
            while (!sr.EndOfStream)
            {
                Console.WriteLine(sr.ReadLine());
            }

            Console.ReadKey();


            string filePathw = @"E:\dotNet\Study\2.txt";
            string ss = "今天天气真好，花儿都开了！";
            using (StreamWriter sw = new StreamWriter(filePathw, false, Encoding.Default))  
            {
                sw.Write(ss);
                Console.WriteLine("写入成功！");
            }

            Console.ReadKey();
        }
    }
}