to create .zip file in asp.net using C#.

Hi ,

I have created a function to create zip file but when I extract the zip in windows the file which was zip does not contains the extension. please let me know how to get the extension.

calling of the function is like this:

 string filepATH = Server.MapPath("Doc\\hello.docx");
        string fileoutpath = Server.MapPath("Doc\\hellox.zip");
        CompressFile(filepATH, fileoutpath);

 public bool CompressFile(string file, string outputFile)
    {
        try
        {
            //open the file to be compressed
            using (var inFile = File.OpenRead(file))
            {
                //create a new stream from the resulting zip file to be created
                using (var outFile = File.Create(outputFile))
                {
                    //now create a GZipStream object for writing the input file to
                    using (var compress = new GZipStream(outFile, CompressionMode.Compress, false))
                    {
                        //buffer array to hold the input file in
                        byte[] buffer = new byte[inFile.Length];

                        //read the file into the FileStream
                        int read = inFile.Read(buffer, 0, buffer.Length);

                        //now loop (as long as we have data) and
                        //write to the GZipStream
                        while (read > 0)
                        {
                            compress.Write(buffer, 0, read);
                            read = inFile.Read(buffer, 0, buffer.Length);
                        }
                    }
                }
            }
            return true;
        }
        catch (IOException ex)
        {
           // MessageBox.Show(string.Format("Error compressing file: {0}", ex.Message));
            return false;
        }
    }