private void ArtBtnDe_Click(object sender, RoutedEventArgs e)
        {
            string txt = EnTxtEn.Text;

            byte[]       bytes = Encoding.ASCII.GetBytes(txt);
            ArithmeticCl ar    = new ArithmeticCl(bytes);

            double res = Convert.ToDouble(DeTxtEn.Text);

            string w = ar.Decode(res, false);

            DeTxtRes.Text = w;
        }
        private void FileBtnDe_Click(object sender, RoutedEventArgs e)
        {
            TextReader tr       = new StreamReader(@"..\ArtEncode.txt");
            string     resultst = tr.ReadToEnd();

            double[] result = new double[resultst.Length / 7];
            int      n      = 0;

            for (int i = 0; i < resultst.Length; i += 7)
            {
                string s = "0," + resultst.Substring(i, 7);

                result[n] = Convert.ToDouble(s);
                n++;
            }

            tr.Close();

            // byte[] bytes = File.ReadAllBytes(@"..\test1.txt");


            TextWriter tw = new StreamWriter(@"..\ArtDecode.txt");

            for (int i = 0; i <= result.Length - 2; i++)
            {
                string txt = globalArithmetic.Decode(result[i], false);
                tw.Write(txt);
            }

            string txt1 = globalArithmetic.Decode(result[result.Length - 1], true);

            tw.Write(txt1);


            tw.Close();
        }