VS 2010中的System.IO.Compression.FileSystem程序集

Question

I'm trying to compile this simple code in my C# WinForms project in VS 2010:

using System.IO;
using System.IO.Compression;

string zipPath = @"c:\example\start.zip";
string extractPath = @"c:\example\extract";

using (ZipArchive archive = ZipFile.OpenRead(zipPath))
{
    foreach (ZipArchiveEntry entry in archive.Entries)
    {
        if (entry.FullName.EndsWith(".txt", StringComparison.OrdinalIgnoreCase))
        {
            entry.ExtractToFile(Path.Combine(extractPath, entry.FullName));
        }
    }
}

The description for the ZipFile Class tells me that I need to add System.IO.Compression.FileSystem assembly. Sorry for this question, but where the heck is it? Does it come as a DLL? It is not in the list of the .NET references, and I know for sure that I have .NET Framework v.4.5 installed.

EDIT : Whoever wants to include a simple Zip archive support in your VS 2010 project, I found this project that compiles right into your own project. Very clean and simple.

Answer 1

You may have the .NET 4.5 framework installed, but you need to have VS 2012 to use components from it when developing programs in 4.5.

VS 2010 supports .NET 2.0, 3.0, 3.5 and 4.0, but not 4.5.

VS 2012 supports all of the above plus .NET 4.5. The ZipFile Class is new in 4.5, there are no earlier versions of it (according to the MSDN link, at least).

If you don't want to buy VS 2012, you can check into the Visual Studio Express 2012 Products , which are free.

Answer 2

You can use Visual Studio 2010 and it does support it, provided your OS supports .NET 4.5.
I know this because I use Visual Studio 2010 on Windows 8.

Right click on your solution to add a reference (as you do). When the dialog box shows, select browse, then navigate to the following folder:

C:\\Program Files (x86)\\Reference Assemblies\\Microsoft\\Framework\\.NETFramework\\v4.5

You will find it there.

I had the same issue a while back.

Hope this helps.