using Ionic.Zip;


public class ZipHelper
    {
        public static void ZipSingleFile(string zipPath)
        {
            try
            {
                using (ZipFile zip = new ZipFile())
                {
                    zip.AddFile("c:\\images\\personal\\7440-N49th.png", "images");
                    zip.AddFile(
 
"c:\\Reports\\2008-Regional-Sales-Report.pdf", "files");
                    zip.AddFile("ReadMe.txt");
                    zip.Save(zipPath);
                }
            }
            catch (Exception ex)
            {
                System.Console.Error.WriteLine("exception: " + ex);
            }
        }
        
 
public static void UnZipSingleFile(string path)
        {
            try
            {
                using (ZipFile zip = new ZipFile(path))
                {
                    var baseDir = Path.GetDirectoryName(path);
                    var fileName = Path.GetFileNameWithoutExtension(path);
                    
 
var newDir = Path.Combine(baseDir, fileName);
                    Directory.CreateDirectory(newDir);
                    zip.ExtractAll(newDir, ExtractExistingFileAction.OverwriteSilently);
                }
                File.Delete(path);
            }
            catch(Exception ex)
            {
                System.Console.Error.WriteLine("exception: " + ex);
            }
        }
    }

DoNetZip類庫解壓和壓縮文件