C#.NET自带的压缩解压类Compress/Decompress zip file using System.IO.Packaging

Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/--> 1 using System;
 using System.Collections.Generic;
 using System.IO;
 using System.IO.Packaging;
 
 public class SharpZip
 {
     private const long BUFFER_SIZE = 4096;
 
     public static void CompressFiles(List<string> fileNames, string zipFileName)
     {
         foreach (string file in fileNames)
         {
             CompressFile(zipFileName, file);
         }
     }
 
     public static void CompressFile(string zipFilename, string fileToAdd)
     {
         using (Package zip = System.IO.Packaging.Package.Open(zipFilename, FileMode.OpenOrCreate))
         {
             string destFilename = ".\\" + Path.GetFileName(fileToAdd);
             Uri uri = PackUriHelper.CreatePartUri(new Uri(destFilename, UriKind.Relative));
             if (zip.PartExists(uri))
             {
                 zip.DeletePart(uri);
             }
             PackagePart part = zip.CreatePart(uri, "", CompressionOption.Normal);
             using (FileStream fileStream = new FileStream(fileToAdd, FileMode.Open, FileAccess.Read))
             {
                 using (Stream dest = part.GetStream())
                 {
                     CopyStream(fileStream, dest);
                 }
             }
         }
     }
 
     public static void DecompressFile(string zipFilename, string outPath)
     {
         using (Package zip = System.IO.Packaging.Package.Open(zipFilename, FileMode.Open))
         {
             foreach (PackagePart part in zip.GetParts())
             {
                 string outFileName = Path.Combine(outPath, part.Uri.OriginalString.Substring(1));
                 using (System.IO.FileStream outFileStream = new System.IO.FileStream(outFileName, FileMode.Create))
                 {
                     using (Stream inFileStream = part.GetStream())
                     {
                         CopyStream(inFileStream, outFileStream);
                     }
                 }
             }
         }
     }
 
     private static void CopyStream(System.IO.Stream inputStream, System.IO.Stream outputStream)
     {
         long bufferSize = inputStream.Length < BUFFER_SIZE ? inputStream.Length : BUFFER_SIZE;
         byte[] buffer = new byte[bufferSize];
         int bytesRead = 0;
         long bytesWritten = 0;
         while ((bytesRead = inputStream.Read(buffer, 0, buffer.Length)) != 0)
         {
             outputStream.Write(buffer, 0, bytesRead);
             bytesWritten += bufferSize;
         }
     }
 }