Error while using ZipArchive.

Question

Hi,

    The below is my code. i got error in  marked Lines. 

Error :

    

Severity Code Description Project File Line

Error CS1674 'ZipArchive': type used in a using statement must be implicitly convertible to 'System.IDisposable' 

 

Severity Code Description Project File Line

Error CS0246 The type or namespace name 'ZipArchiveEntry' could not be found (are you missing a using directive or an assembly reference?)

 I added the namespaces correctly but i got error. What mistake i did. kindly help me. Thanks in Advance.

 

using System;

using System.Windows.Forms;

using System.IO;

using System.IO.Compression;

namespace Zip

{

public partial class Form1 : Form

{

public Form1()

{

InitializeComponent();

}

private void btnclr_Click(object sender, EventArgs e)

{

txtsource.Text = "";

txtZip.Text = "";

}

private void btnprocess_Click(object sender, EventArgs e)

{

using (FileStream zipToOpen = new FileStream(txtZip.Text, FileMode.Open))

{

using (ZipArchive archive = new ZipArchive(zipToOpen, ZipArchiveMode.Update))

{

   ZipArchiveEntry readmeEntry;

   DirectoryInfo d = new DirectoryInfo(txtsource.Text);

   FileInfo[] Files = d.GetFiles("*");

   foreach (FileInfo file in Files)

   {

      readmeEntry = archive.CreateEntryFromFile(txtsource.Text + "\\" + file.Name,       txtsource.Text + "/" + file.Name);

   }

}

}

}

}

}