I didn t find ZipFile class in the System IO Compression namespace

Question

I can t use  Zipfile  class in the name space  System IO Compression  my code is    using System  using System IO  using System IO Compression   namespace ConsoleApplication       class Program               static void Main string   args                        string startPath     c  example start               string zipPath     c  example result zip               string extractPath     c  example extract                ZipFile CreateFromDirectory startPath  zipPath  CompressionLevel Fastest true                ZipFile ExtractToDirectory zipPath  extractPath                       the error is    The name  zipfile  does not exist in the current context  How I can solve it

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In solution explorer  right-click References  then click to expand assemblies  find System IO Compression FileSystem and make sure it s checked   Then you can use it in your class - using System IO Compression   Add Reference Assembly Screenshot

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you can use an external package if you cant upgrade to 4 5  One such is Ionic Zip dll from DotNetZipLib   using Ionic Zip    you can download it here  its free  http   dotnetzip codeplex com

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For those who are green programmers in  NET  to add the DLL reference as MarcGravell noted  you follow these steps   To add a reference in Visual C    In Solution Explorer  right-click the project node and click Add Reference  In the Add Reference dialog box  select the tab indicating the type of component you want to reference  Select the components you want to reference  and then click OK    From the MSDN Article  How to  Add or Remove References By Using the Add Reference Dialog Box

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I know this is an old thread  but I just cannot steer away from posting some useful info on this  I see the Zip question come up a lot and this answers nearlly most of the common questions   To get around framework issues of using 4 5     Their is a ZipStorer class created by jaime-olivares  https   github com jaime-olivares zipstorer  he also has added an example of how to use this class as well and has also added an example of how to search for a specific filename as well   And for reference on how to use this and iterate through for a certain file extension as example you could do this    region      lt summary gt      Custom Method - Check if  string  has   png  or   PNG  extension       lt  summary gt  static bool HasPNGExtension string filename        return Path GetExtension filename  Equals   png   StringComparison InvariantCultureIgnoreCase             Path GetExtension filename  Equals   PNG   StringComparison InvariantCultureIgnoreCase      endregion  private void button1 Click object sender  EventArgs e          NOTE  I recommend you add path checking first here  added the below as example ONLY      string ZIPfileLocationHere     C  Users Name Desktop test zip       string EXTRACTIONLocationHere     C  Users Name Desktop          Opens existing zip file      ZipStorer zip   ZipStorer Open ZIPfileLocationHere  FileAccess Read          Read all directory contents      List lt ZipStorer ZipFileEntry gt  dir   zip ReadCentralDir         foreach  ZipStorer ZipFileEntry entry in dir                try                         If the files in the zip are    png or   PNG  extract them              string path   Path Combine EXTRACTIONLocationHere   entry FilenameInZip                if  HasPNGExtension path                                   Extract the file                  zip ExtractFile entry  path                                   catch  InvalidDataException                        MessageBox Show  Error  The ZIP file is invalid or corrupted                continue                    catch                       MessageBox Show  Error  An unknown error ocurred while processing the ZIP file                 continue                      zip Close

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A solution that helped me  Go to Tools   NuGet Package Manager   Manage NuGet Packaged for Solution      Browse   Search for System IO Compression ZipFile and install it

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System IO Compression is now available as a nuget package maintained by Microsoft     To use ZipFile you need to download System IO Compression ZipFile nuget package

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The issue here is that you just Added the reference to System IO Compression it is missing the reference to System IO Compression Filesystem dll  And you need to do it on  net 4 5 or later  because it doesn t exist on older versions    I just posted a script on TechNet Maybe somebody would find it useful it requires  net 4 5 or 4 7  https   gallery technet microsoft com scriptcenter Create-a-Zip-file-from-a-b23a7530

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Add System IO Compression ZipFile as nuget reference it is working

User · Answer

Just go to References and add  System IO Compression FileSystem

User · Answer

You need an extra reference for this  the most convenient way to do this is via the NuGet package System IO Compression ZipFile   lt  -- Version here correct at time of writing  but please check for latest -- gt   lt PackageReference Include  System IO Compression ZipFile  Version  4 3 0    gt    If you are working on  NET Framework without NuGet  you need to add a dll reference to the assembly   System IO Compression FileSystem dll  - and ensure you are using at least  NET 4 5  since it doesn t exist in earlier frameworks    For info  you can find the assembly and  NET version s  from MSDN

[c#] I didn't find "ZipFile" class in the "System.IO.Compression" namespace

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