如何在.net framework 4.0中压缩文件夹

Question

How to zip a folder using vb.net and in .net framework 4.0. I am able to do this by using ZipFile class which is available in framework 4.5 but I need to use only framework 4.0 and also no third party library. Please help

Answer 1

Actually you can use the ZipFile class in .NET 4.0 as well. You just gotta add a reference to the System.IO.Compression.FileSystem.dll file, located in:

%SystemRoot%\Microsoft.NET\assembly\GAC_MSIL\System.IO.Compr‌​‌​‌​ession.FileSyste‌​m\‌​v4‌​.0_4.0.0.0__‌​b77a‌​5c56‌​1934e089‌​\Syste‌​m.IO.C‌​ompr‌​ession.F‌​ileSyste‌​‌​m.dll

As you see it is located in the "v4.0" folder, so it exists in .NET 4.0, but for some reason isn't referenced automatically.

---

To add a reference to your project:

1. Right-click the project node in the Solution Explorer .

   

   (Image credit: another Stack Overflow question )

2. Press Add Reference... .

3. Go to the Browse tab and locate the file mentioned above.

How to: Add or Remove References By Using the Add Reference Dialog Box