C#解壓多個文件夾下的多個zip到一個目錄下

 using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
 using System.IO;
 using ICSharpCode.SharpZipLib;
 using ICSharpCode.SharpZipLib.Zip;
 using ICSharpCode.SharpZipLib.Checksums;
 
 namespace Unzip
 {
     class Unzip
     {
         /// <summary>
         /// 解壓一個文件
         /// </summary>
         /// <param name="zipFilePath">需要解壓文件所在的路徑</param>
         /// <param name="targetFilePath">將zip解壓到此目錄下</param>
         /// <returns></returns>
         public static void UnZipFile(string zipFilePath, string targetFilePath)
         {
             ZipInputStream zipInputStream = null;
             FileStream streamWrite = null;
             ZipEntry ent = null;
             string fileName;//解壓文件時讀寫zip文件所用的變量
 
             // 去掉文件夾或文件的只讀屬性
             if (true == Directory.Exists(zipFilePath))
             {
                 System.IO.DirectoryInfo directoryInfo = new System.IO.DirectoryInfo(zipFilePath);
                 directoryInfo.Attributes = FileAttributes.Normal;
             }
 
             //創建目錄
             if (!Directory.Exists(targetFilePath))
                 Directory.CreateDirectory(targetFilePath);
 
             //遍歷文件夾
             DirectoryInfo theFolder = new DirectoryInfo(zipFilePath);
             DirectoryInfo[] dirInfo = theFolder.GetDirectories();
 
             foreach (DirectoryInfo NextFolder in dirInfo)
             {
                 //遍歷子文件          
                 FileInfo[] fileInfo = NextFolder.GetFiles("*.zip", SearchOption.AllDirectories);
 
                 foreach (FileInfo NextFile in fileInfo)
                 {
                     try
                     {
                         //去掉只讀屬性
                         File.SetAttributes(zipFilePath, FileAttributes.Normal);     
 
                         zipInputStream = new ZipInputStream(File.OpenRead(NextFile.FullName));
 
                         while ((ent = zipInputStream.GetNextEntry()) != null)
                         {
                             if (!string.IsNullOrEmpty(ent.Name))
                             {
                                 fileName = Path.Combine(targetFilePath + @"\" + NextFolder.Name, ent.Name);
                                 fileName = fileName.Replace('/', '\\');
 
                                 if (fileName.EndsWith("\\"))
                                 {
                                     Directory.CreateDirectory(fileName);
                                     continue;
                                 }
 
                                 streamWrite = File.Create(fileName);
                                 int size = 2048;
                                 byte[] data = new byte[size];
 
                                 while (true)
                                 {
                                     size = zipInputStream.Read(data, 0, data.Length);
                                     if (size > 0)
                                         streamWrite.Write(data, 0, size);
                                     else
                                         break;
                                 }
                             }
                         }
                     }
                     catch(Exception ex)
                     {
                         throw ex;
                     }
                     finally
                     {
                         if (streamWrite != null)
                         {
                             streamWrite.Close();
                             streamWrite.Dispose();
                         }
                         if (zipInputStream != null)
                         {
                             zipInputStream.Close();
                             zipInputStream.Dispose();
                         }
                         if (ent != null)
                         {
                             ent = null;
                         }
                         GC.Collect();
                         GC.Collect(1);
                     }
                 }
             }
         }