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("压缩成功!");                              }              }                   }            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("解压成功!");                                 }                  }              }          }      }  }