I want to learn zip file from the link below but got an error said that "ZipArchive is not defined"
How to fix it?
(I used vs2015, win7, framework 4.5)

https://msdn.microsoft.com/en-us/lib...v=vs.110).aspx

Imports System.IO
Imports System.IO.Compression

Module Module1

Sub Main()
Dim zipPath As String = "c:\example\start.zip"
Dim extractPath As String = "c:\example\extract"

Using archive As ZipArchive = ZipFile.OpenRead(zipPath)
For Each entry As ZipArchiveEntry In archive.Entries
If entry.FullName.EndsWith(".txt", StringComparison.OrdinalIgnoreCase) Then
entry.ExtractToFile(Path.Combine(extractPath, entry.FullName))
End If
Next
End Using
End Sub

End Module