private void Button_Encode_Click(object sender, EventArgs e)
        {
            Stopwatch timer = new Stopwatch();

            timer.Start();
            Controller_LSB LSB = new Controller_LSB(C_Image, Key.Text, Plaintext.Text, Setting);

            S_Image = LSB.Encode(Ciphertext, Stego_Image, Button_Save);
            timer.Stop();
            Console.WriteLine(timer.Elapsed.ToString());
        }
        private void Button_Decode_Click(object sender, EventArgs e)
        {
            Stopwatch timer = new Stopwatch();

            timer.Start();
            S_Image = Utility.GetStego();
            Controller_LSB LSB = new Controller_LSB(S_Image, Key2.Text, NCharacter2.Value, Setting);

            LSB.Decode(Ciphertext2, Plaintext2, Button_Save2);
            timer.Stop();
            Console.WriteLine(timer.Elapsed.ToString());
        }