private void btn_back_Click(object sender, EventArgs e)
        {
            Form_Menu form2 = new Form_Menu(myScheduling);

            form2.Show();
            form2.Location = this.Location;
            Hide();
        }
        private void btn_back_Click(object sender, EventArgs e)
        {
            // Navigate Page.
            Form_Menu form = new Form_Menu(myScheduling);

            form.Show();
            form.Location = this.Location;
            Hide();
        }
        private void btn_done_Click(object sender, EventArgs e)
        {
            myScheduling.flag_language_bar = checkBox_avialable_lang_bar.Checked;
            if (comboBox_language.SelectedIndex == 0)
            {
                myScheduling.language = "EN";
            }
            else if (comboBox_language.SelectedIndex == 1)
            {
                myScheduling.language = "TH";
            }

            Form_Menu form = new Form_Menu(myScheduling);

            form.Show();
            form.Location = this.Location;
            Hide();
        }