不错的开源压缩组件（可惜没能用上）

< Deployment  xmlns ="<a href=" http://schemas.microsoft.com/client/2007/deployment"" > http://schemas.microsoft.com/client/2007/deployment" </ a >  

xmlns:x=" < a  href ="http://schemas.microsoft.com/winfx/2006/xaml" " > http://schemas.microsoft.com/winfx/2006/xaml" </ a >  EntryPointAssembly="ProjectA" 

EntryPointType="ProjectA.App" RuntimeVersion="4.0.50401.0"> 
   < Deployment.OutOfBrowserSettings >  
     < OutOfBrowserSettings  ShortName ="ProjectA Application"  EnableGPUAcceleration ="False"  

ShowInstallMenuItem ="True" >  
       < OutOfBrowserSettings.Blurb > ProjectA Application on your desktop; at home, at work or on the 

go. </ OutOfBrowserSettings.Blurb >  
       < OutOfBrowserSettings.WindowSettings >  
         < WindowSettings  Title ="ProjectA Application"   />  
       </ OutOfBrowserSettings.WindowSettings >  
       < OutOfBrowserSettings.Icons  />  
     </ OutOfBrowserSettings >  
   </ Deployment.OutOfBrowserSettings >  
   < Deployment.Parts >  
     < AssemblyPart  x:Name ="ProjectA"  Source ="ProjectA.dll"   />  
     < AssemblyPart  x:Name ="ProjectB"  Source ="ProjectB.dll"   />  
     < AssemblyPart  x:Name ="System.Windows.Controls"  Source ="System.Windows.Controls.dll"   />  
     < AssemblyPart  x:Name ="Telerik.Windows.Controls"  Source ="Telerik.Windows.Controls.dll"   />  
   </ Deployment.Parts >  
</ Deployment >

using  System; 
using  System.Collections.Generic; 
using  System.Linq; 
using  System.Web;

using  System.IO; 
using  ICSharpCode.SharpZipLib.Zip;

namespace  SLProjectsDownLoad.Web 
{ 
     public   class  Zip 
    { 
         public   static   void  ZipFiles( string  ZipFileName,  string  FromDirectory) 
        { 
            FastZip fz  =   new  FastZip(); 
            fz.CreateEmptyDirectories  =   true ; 
            fz.CreateZip(ZipFileName, FromDirectory,  true ,  "" ); 
            fz  =   null ; 
        }

         public   static   void  UnZipFiles( string  ZipFileName,  string  ToDirectory) 
        { 
             if  ( ! Directory.Exists(ToDirectory)) 
                Directory.CreateDirectory(ToDirectory);

            ZipInputStream s  =   new  ZipInputStream(File.OpenRead(ZipFileName));

            ZipEntry theEntry; 
             while  ((theEntry  =  s.GetNextEntry())  !=   null ) 
            { 
                 string  directoryName  =  Path.GetDirectoryName(theEntry.Name); 
                 string  fileName  =  Path.GetFileName(theEntry.Name);

                 if  (directoryName  !=  String.Empty) 
                    Directory.CreateDirectory(ToDirectory  +  directoryName);

                 if  (fileName  !=  String.Empty) 
                { 
                    FileStream streamWriter  =  File.Create(ToDirectory  +  theEntry.Name);

                     int  size  =   2048 ; 
                     byte [] data  =   new   byte [ 2048 ]; 
                     while  ( true ) 
                    { 
                        size  =  s.Read(data,  0 , data.Length); 
                         if  (size  >   0 ) 
                        { 
                            streamWriter.Write(data,  0 , size); 
                        } 
                         else  
                        { 
                             break ; 
                        } 
                    } 
                    streamWriter.Close(); 
                } 
            } 
            s.Close(); 
        } 
    } 
}