using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.IO;using System.IO.Compression;using System.Linq;using System.Text;using System.Threading.Tasks;using System.Windows.Forms;namespace 文件流{ public partial class Form1 : Form { public Form1() {  InitializeComponent(); } private void button1_Click(object sender, EventArgs e) {  string s = "好好好好好好好好好好好好好好好好好好好好好哈好好好好好啊";  for (int i = 0; i < 10; i++)  {  s += s;  }  using (FileStream fs=File.OpenWrite(@"c:/1.txt"))  {  using (GZipStream zipStream=new GZipStream(fs,CompressionMode.Compress))  {   byte[] bytes = Encoding.UTF8.GetBytes(s);   zipStream.Write(bytes,0,bytes.Length);   MessageBox.Show("壓縮成功!");    }  } } private void button2_Click(object sender, EventArgs e) {  using (FileStream fs=File.OpenRead(@"c:/1.txt"))  {  using (GZipStream zipStream=new GZipStream(fs,CompressionMode.Decompress))  {   using (FileStream fs1=File.OpenWrite(@"c:/upzip.txt"))   {   int bytesRead;   byte[] bytes=new byte[1024];   while((bytesRead=zipStream.Read(bytes,0,bytes.Length))>0)   {    fs1.Write(bytes,0,bytesRead);   }   MessageBox.Show("解壓成功!");     }  }  } } }}