Use GZipStream to Zip : GZipStream « File Stream

   





using System;

using System.Collections.Generic;

using System.Text;

using System.IO;

using System.IO.Compression;



class Program {

    static void SaveCompressedFile(string filename, string data) {

        FileStream fileStream = new FileStream(filename, FileMode.Create, FileAccess.Write);

        GZipStream compressionStream = new GZipStream(fileStream, CompressionMode.Compress);

        StreamWriter writer = new StreamWriter(compressionStream);

        writer.Write(data);

        writer.Close();

    }



    static string LoadCompressedFile(string filename) {

        FileStream fileStream = new FileStream(filename, FileMode.Open, FileAccess.Read);

        GZipStream compressionStream = new GZipStream(fileStream, CompressionMode.Decompress);

        StreamReader reader = new StreamReader(compressionStream);

        string data = reader.ReadToEnd();

        reader.Close();

        return data;

    }



    static void Main(string[] args) {

        try {

            string filename = "compressedFile.txt";

            string sourceString = "Source String";

            SaveCompressedFile(filename, sourceString);

            FileInfo compressedFileData = new FileInfo(filename);

            string recoveredString = LoadCompressedFile(filename);

        } catch (IOException ex) {

            Console.WriteLine(ex.ToString());

        }

    }

}
Use GZipStream to Zip : GZipStream « File Stream « C# / C Sharp
