Development of a zip compression software of my own

Any file that can be read, can be read by any application. You cannot prevent that - because it would also prevent your application form being able to read it and that turns your hard drive into Write Only Memory.

What you can do is encrypt of obfuscate the file contents so that only your can understand the content once it is read. That's not difficult, but requires a good deal background reading in order to make it secure.

Start here: http://msdn.microsoft.com/en-us/library/as0w18af(v=vs.110).aspx[^] and follow the links. Then start thinking about exactly what you are trying to achieve and what best fits that.

In order to compress as well, you will need to use a package like zipsharp, or write your own: http://en.wikipedia.org/wiki/Data_compression[^] gives an overview of the various methods you might implement.

Only a suggestion , need improvements.

using System;                                                                              
using System.IO;
using System.IO.Compression;

namespace ConsoleApplication
{
    class Program
    {
        static void Main(string[] args)
        {
            string startPath = @"c:\example\start";
            string zipPath = @"c:\example\result.zip";
            string extractPath = @"c:\example\extract";
            string myFile = @"c:\example\result.xxx";

            ZipFile.CreateFromDirectory(startPath, zipPath);

            /// Scamble zip file in xxx file with an MyScrambleAlgo function, likely using an array of byte
            /// TODO

            /// Change name : zipPath =>  myFile.xxx
            /// TODO

            /// Now you have your custom zip and scrambled file , only you can open it
 
            /// To read your file do the same in reverse order
            /// Unscramble xxx file in zip file with an MyUnScrambleAlgo function, likely using an array of byte
            /// TODO

            /// Change name myfile.xxx => zipPath
            /// TODO

            ZipFile.ExtractToDirectory(zipPath, extractPath);
        }



    }
}

Hope help
Hi

check on this link

http://msdn.microsoft.com/en-us/library/system.io.compression.gzipstream%28v=vs.110%29.aspx


this will help you