C # Extract and compress file source code

Using system.io;using system.windows.forms;using icsharpcode.sharpziplib.zip;using   ICSharpCode.SharpZipLib.Checksums; public void UnZip (string strsoucefile, String strdestfile) {if (!            Directory.Exists (strDestFile)) directory.createdirectory (strDestFile); using (zipinputstream zip = new Zipinputstream (File.openread (strsoucefile))) {ZipEntry theentry                ;                String FileName;                FileStream StreamWriter; while (Theentry = zip.                    Getnextentry ()) = null) {FileName = Path.getfilename (theentry.name); if (fileName! = String.Empty) {streamWriter = new FileStream (strDestFile + F Ilename, FileMode.Create, FileAccess.Write, FileShare.Read |                        Fileshare.write);                        int size = 2048;                        byte[] data = new byte[2048];               while (true)         {size = zip. Read (data, 0, data.                            Length);                            if (Size > 0) {streamwriter.write (data, 0, size);                            } else {break;                    }} streamwriter.close (); }} MessageBox.Show ("Unzip the file successfully!
"," hint ", messageboxbuttons.ok,messageboxicon.information); }} public void ZipFile (string strsoucefile, String strdestfile) {using (Zipoutputstream stream = new Zipoutputstream (File.create (strDestFile))) {stream.                SetLevel (5);                byte[] buffer = new byte[0x1000];                ZipEntry entry = new ZipEntry (Path.getfilename (strsoucefile)); Entry.                DateTime = DateTime.Now; Stream.                Putnextentry (entry);                    using (FileStream stream2 = File.openread (strsoucefile)) {int num; do {num = stream2. Read (buffer, 0, buffer.                        Length); Stream.                    Write (buffer, 0, num);                    } while (num > 0); MessageBox.Show ("Compressed file succeeded!
"); } stream.                Finish (); Stream.            Close (); }        }

DLL that needs to be referenced, download DLL for page below
http://download.csdn.net/detail/sky_cat/7236675

C # Extract and compress file source code