Folder.Zip Method

public static void Zip(string sourceFolder,
     string zipFile)
 {
     if (!Directory.Exists(sourceFolder))
         throw new ArgumentException("sourceDirectory");
     byte[] zipHeader = new byte[] { 80, 75, 5, 6, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
     using (FileStream fs = System.IO.File.Create(zipFile))
         fs.Write(zipHeader, 0, zipHeader.Length);
     dynamic shellApplication = Activator.CreateInstance(Type.GetTypeFromProgID("Shell.Application"));
     dynamic source = shellApplication.NameSpace(sourceFolder);
     dynamic destination = shellApplication.NameSpace(zipFile);
     destination.CopyHere(source.Items(), 20);
 }