C#压缩和解压文件的两种方法

public static void CreateFromDirectory(
    string sourceDirectoryName,
    string destinationArchiveFileName
 )

public static void CreateFromDirectory(
     string sourceDirectoryName,//sourceDirectoryName 要压缩的文件夹
     string destinationArchiveFileName, //destinationArchiveFileName 压缩后的文件名
     CompressionLevel compressionLevel,//compressionLevel 压缩级别  Fastest-最快 NoCompression-不压缩 Optimal-最好
     bool includeBaseDirectory //includeBaseDirectory 是否包含当前目录
 )

static void Main(string[] args)
         {
             ZipFile.CreateFromDirectory("D:\\test", "D:\\a.zip");
          }

static void Main(string[] args)
         {           
             ZipFile.CreateFromDirectory("D:\\test", "D:\\b.zip",CompressionLevel.Optimal,true);
         }

public static void ExtractToDirectory(
    string sourceArchiveFileName,  //压缩文件完整路径
     string destinationDirectoryName //指定解压文件夹
 )

static void Main(string[] args)
         {          
             ZipFile.ExtractToDirectory("D:\\a.zip", "D:\\");
        }

 using (FileStream fs = new FileStream("D:\\a.zip", FileMode.Open))
             {
                 using (ZipArchive archive = new ZipArchive(fs, ZipArchiveMode.Update))
                 {
                     archive.CreateEntryFromFile("C:\\Users\\ZhaoJia\\Pictures\\1.jpg","1.jpg");                                      
                 }
             }

   static void Main(string[] args)
          {
              string filePath = "D:\\test";    //要添加到压缩文件的目录
              string targetPath = "D:\\";      //压缩文件存放的目录         
  
              DirectoryInfo dirInfo = new DirectoryInfo(filePath);
  
              foreach (FileInfo fileInfo in dirInfo.GetFiles())
              {
                 using (FileStream fsorg = fileInfo.OpenRead())
                 {
                     using (FileStream fs = File.Create(targetPath + fileInfo.Name + ".gz"))
                     {
                         using (GZipStream compressionStream = new GZipStream(fs,
                             CompressionMode.Compress))
                         {
                             fsorg.CopyTo(compressionStream);
                         }
                     }
                 }
             }
         }

    string compressFilePath = "D:\\4172212144245982608.jpg.gz";//压缩文件名
  
              FileInfo fileInfo = new FileInfo(compressFilePath);
  
              using (FileStream originalFileStream = fileInfo.OpenRead())
              {
                  string currentFileName = fileInfo.FullName;
                  string newFileName = currentFileName.Remove(currentFileName.Length - fileInfo.Extension.Length);
  
                 using (FileStream decompressedFileStream = File.Create(newFileName))
                 {
                     using (GZipStream decompressionStream = new GZipStream(originalFileStream, CompressionMode.Decompress))
                     {
                         decompressionStream.CopyTo(decompressedFileStream);                   
                     }
                 }
             }

  static void Main(string[] args)
          {
              const string RARToolName = "Rar.exe";        //Rar命令行exe
              string compressionFileName = "D:\\test.rar"; //压缩后的文件名
              string sourceFolderName = "D:\\test";        //要压缩的文件夹
  
              Process p = new Process();
              ProcessStartInfo startInfo = new ProcessStartInfo();
              startInfo.FileName = RARToolName;
             startInfo.CreateNoWindow = false;
             startInfo.UseShellExecute = false;
             startInfo.Arguments = string.Format("{0} {1} {2}","a",compressionFileName,sourceFolderName);
             p.StartInfo = startInfo;
             p.Start();
         }

 const string RARToolName = "Rar.exe";        //Rar命令行exe
             string compressionFileName = "D:\\test.rar"; //指定压缩文件名
             string sourceFolderName = "D:\\test";   //要解压到的文件夹
             Process p = new Process();
             ProcessStartInfo startInfo = new ProcessStartInfo();
             startInfo.FileName = RARToolName;
             startInfo.CreateNoWindow = false;
             startInfo.UseShellExecute = false;
             startInfo.Arguments = string.Format("{0} {1} {2}","x",compressionFileName,sourceFolderName);
             p.StartInfo = startInfo;
             p.Start();

   static void Main(string[] args)
         {
             string imageFilePath = "D:\\2.jpg";            //图片文件路径
             string rarFilePath = "D:\\test.rar";           //压缩文件路径
             string command = string.Format("copy /b {0} + {1} = {0}",imageFilePath,rarFilePath);  //命令
 
             Process p = new Process();
             ProcessStartInfo startInfo = new ProcessStartInfo();
             startInfo.FileName = "cmd.exe";
             startInfo.UseShellExecute = false;    
             startInfo.CreateNoWindow = false;
             startInfo.RedirectStandardInput = true;
             startInfo.RedirectStandardOutput = true;
             p.StartInfo = startInfo;          
             p.Start();
             p.StandardInput.WriteLine(command + "&exit");
             p.StandardInput.AutoFlush = true;      
             p.WaitForExit();
             p.Close();
             Console.WriteLine("执行成功");
 }