streamWriter=File.Create(aDestDir+directoryName+fileName);
while((size=s.Read(data, 0 ,data.Length))> 0 )
   streamWriter.Write(data, 0 ,size);
streamWriter.Close(); 

		public static void Extract(string aZipFileName, string aDestDir, bool WithFullPath)
		{
			ZipInputStream
				s=null;

			FileStream
				streamWriter=null;

			try
			{
				try
				{
					if(aDestDir==null || aDestDir==string.Empty)
						aDestDir=Directory.GetCurrentDirectory();
					if(aDestDir.EndsWith(Path.DirectorySeparatorChar.ToString()))
						aDestDir=aDestDir.Remove(aDestDir.Length- 1 , 1 );
					if(!Directory.Exists(aDestDir))
						Directory.CreateDirectory(aDestDir);
					aDestDir+=Path.DirectorySeparatorChar;

					s=new ZipInputStream(File.OpenRead(aZipFileName));

					ZipEntry
						entry;

					string
						directoryName,
						fileName;

					int
						pos,
						size= 8192 ;

					byte[]
						data=null;
					
					while(data==null && size!= 0 )
					{
						try
						{
							data=new byte[size];
						}
						catch(OutOfMemoryException)
						{
							size>>= 1 ;
						}
					}
					if(data==null && size== 0 )
						throw(new Exception("Insufficient memory")); 

					while((entry=s.GetNextEntry())!=null)
					{
						if(WithFullPath)
						{
							directoryName=Path.GetDirectoryName(entry.Name);
							if((pos=directoryName.IndexOf(Path.VolumeSeparatorChar))>= 0 )
								directoryName=directoryName.Remove( 0 ,pos+ 1 );
							if(directoryName.StartsWith(Path.DirectorySeparatorChar.ToString()))
								directoryName=directoryName.Remove( 0 , 1 );
							if(!Directory.Exists(aDestDir+directoryName))
								Directory.CreateDirectory(aDestDir+directoryName);
							directoryName+=Path.DirectorySeparatorChar;
						}
						else
							directoryName=string.Empty;

						if((fileName=Path.GetFileName(entry.Name))!=string.Empty)
						{
							streamWriter=File.Create(aDestDir+directoryName+fileName);
							while((size=s.Read(data, 0 ,data.Length))> 0 )
								streamWriter.Write(data, 0 ,size);
							streamWriter.Close();
							streamWriter=null;
							File.SetLastWriteTime(aDestDir+directoryName+fileName,entry.DateTime);
						}
					}
				}
				catch(Exception eException)
				{
					throw(new Exception(eException.GetType().FullName+Environment.NewLine+"Message: "+eException.Message+Environment.NewLine+"StackTrace:"+Environment.NewLine+eException.StackTrace));
				}
			}
			finally
			{
				if(streamWriter!=null)
					streamWriter.Close();
				if(s!=null)
					s.Close();
			}
		}