C# DeflateStream DeflateStream(Stream, CompressionLevel, Boolean)

public DeflateStream(
  Stream stream,//from   w ww .ja  va2 s. c  o  m
  CompressionLevel compressionLevel,
  bool leaveOpen
)

/*from  w  ww. ja  v  a2 s .c o m*/
using System;
using System.Collections.Generic;
using System.IO;
using System.IO.Compression;

class Program
{
    static void Main(string[] args)
    {
        string directoryPath = @"c:\users";
        DirectoryInfo directorySelected = new DirectoryInfo(directoryPath);

        foreach (FileInfo fileToCompress in directorySelected.EnumerateFiles())
        {
            Compress(fileToCompress);
        }
    }

    public static void Compress(FileInfo fileToCompress)
    {
        using (FileStream originalFileStream = fileToCompress.OpenRead())
        {
            if ((File.GetAttributes(fileToCompress.FullName) & FileAttributes.Hidden) != FileAttributes.Hidden & fileToCompress.Extension != ".cmp")
            {
                using (FileStream compressedFileStream = File.Create(fileToCompress.FullName + ".cmp"))
                {
                    using (DeflateStream compressionStream = new DeflateStream(compressedFileStream, CompressionLevel.Fastest, true))
                    {
                        originalFileStream.CopyTo(compressionStream);
                    }
                    Console.WriteLine(string.Format("file compressed to {0} bytes", compressedFileStream.Length));
                }
            }
        }
    }
}