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using System;using System.IO;using System.IO.Compression;namespace zip{    public class Program    {        public static void Main()        {            // Path to directory of files to compress and decompress.            string dirpath = @"c:\users\public\reports";            DirectoryInfo di = new DirectoryInfo(dirpath);            // Compress the directory's files.            foreach (FileInfo fi in di.GetFiles())            {                Compress(fi);            }            // Decompress all *.gz files in the directory.            foreach (FileInfo fi in di.GetFiles("*.gz"))            {                Decompress(fi);            }        }        public static void Compress(FileInfo fi)        {            // Get the stream of the source file.            using (FileStream inFile = fi.OpenRead())            {                // Prevent compressing hidden and                 // already compressed files.                if ((File.GetAttributes(fi.FullName)                     & FileAttributes.Hidden)                    != FileAttributes.Hidden & fi.Extension != ".gz")                {                    // Create the compressed file.                    using (FileStream outFile =                                 File.Create(fi.FullName + ".gz"))                    {                        using (GZipStream Compress =                             new GZipStream(outFile,                             CompressionMode.Compress))                        {                            // Copy the source file into                             // the compression stream.                        inFile.CopyTo(Compress);                            Console.WriteLine("Compressed {0} from {1} to {2} bytes.",                                fi.Name, fi.Length.ToString(), outFile.Length.ToString());                        }                    }                }            }        }        public static void Decompress(FileInfo fi)        {            // Get the stream of the source file.            using (FileStream inFile = fi.OpenRead())            {                // Get original file extension, for example                // "doc" from report.doc.gz.                string curFile = fi.FullName;                string origName = curFile.Remove(curFile.Length -                         fi.Extension.Length);                //Create the decompressed file.                using (FileStream outFile = File.Create(origName))                {                    using (GZipStream Decompress = new GZipStream(inFile,                            CompressionMode.Decompress))                    {                        // Copy the decompression stream                         // into the output file.                        Decompress.CopyTo(outFile);                                                Console.WriteLine("Decompressed: {0}", fi.Name);                    }                }            }        }    }}