How to compress the folder? and download the zip file

Question

protected void Submit_Click(object sender, EventArgs e)

{

string path = Server.MapPath("~/images/");//Location for inside Test Folder

string[] Filenames = Directory.GetFiles(path);

using (ZipFile zip = new ZipFile())

{

zip.AddFiles(Filenames, "Project");//Zip file inside filename

zip.Save(@"C:\Users\user\Desktop\Projectzip.zip");//location and name for creating zip file

}

}