// C# version 3.0
using System;
using System.IO;
using System.Text;
using Shell32; // Reference to C:\WINDOWS\system32\shell32.dll 
 
public static class Zipper {
    public static void Compress(string zipFileName, params string[] fileNames) {
        //Create an empty zip file
        byte[] emptyzip = 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 fileStream = File.Create(zipFileName)) {
            fileStream.Write(emptyzip, 0, emptyzip.Length);
            fileStream.Flush();
            fileStream.Close();
        }
        Add(zipFileName, fileNames);
    }
 
    public static void Add(string zipFileName, params string[] fileNames) {
        Folder destFolder = new ShellClass().NameSpace(zipFileName);
        foreach (string filename in fileNames)
            destFolder.CopyHere(filename, 20);
    }
 
    public static void Extract(string zipFileName, string targetPath) {
        Folder srcFolder = new ShellClass().NameSpace(zipFileName);
        Folder dstFolder = new ShellClass().NameSpace(targetPath);
        dstFolder.CopyHere(srcFolder.Items(), 20);
    }
}
 
 
// Zipper test
internal class Program {
    private static void Main(string[] args) {
        FileInfo zipFileInfo = new FileInfo(Path.Combine(Path.GetTempPath(), Path.GetRandomFileName() + ".zip"));
        if (zipFileInfo.Exists)
            zipFileInfo.Delete();
        Zipper.Compress(zipFileInfo.FullName); // just create empty zip-file
        DirectoryInfo sourceDir = new DirectoryInfo(Path.Combine(Path.GetTempPath(), Path.GetRandomFileName()));
        if (!sourceDir.Exists)
            sourceDir.Create();
        for (int i = 0; i < 31; i++) {
            FileInfo fileInfo = new FileInfo(Path.Combine(sourceDir.FullName, Path.GetRandomFileName()));
            if (!fileInfo.Exists) {
                using (FileStream fileStream = fileInfo.Create()) {
                    for (int j = 0; j < 15; j++) {
                        byte[] bytes = Encoding.Default.GetBytes(fileInfo.FullName + Environment.NewLine);
                        fileStream.Write(bytes, 0, bytes.Length);
                    }
                    fileStream.Close();
                }
            }
            Zipper.Add(zipFileInfo.FullName, fileInfo.FullName);
        }
        DirectoryInfo targetDir = new DirectoryInfo(Path.Combine(Path.GetTempPath(), Path.GetRandomFileName()));
        if (!targetDir.Exists)
            targetDir.Create();
        Zipper.Extract(zipFileInfo.FullName, targetDir.FullName);
 
        sourceDir.Delete(true);
        targetDir.Delete(true);
        zipFileInfo.Delete();
    }
}