private void load_Click(object sender, RoutedEventArgs e)
        {
            OpenFileDialog dialog = new OpenFileDialog();

            dialog.Filter = "dat files (*.dat)|*.dat";
            dialog.ShowDialog();

            string path = dialog.FileName;

            if (path.Equals(""))
            {
                return;
            }

            using (FileStream fs = new FileStream(path, FileMode.OpenOrCreate))
            {
                StreamReader sr    = new StreamReader(fs);
                MyStyle      style = (MyStyle)XamlReader.Parse(sr.ReadToEnd());

                sideLeft.chageColor(style.fontColor, style.backgroundColor);
                sideRight.chageColor(style.fontColor, style.backgroundColor);
                sideLeft.changeFont(style.fontSize);
                sideRight.changeFont(style.fontSize);
            }
        }
        private void save_Click(object sender, RoutedEventArgs e)
        {
            SaveFileDialog dialog = new SaveFileDialog();

            dialog.Filter = "dat files (*.dat)|*.dat";
            dialog.ShowDialog();

            string path = dialog.FileName;

            if (path.Equals(""))
            {
                return;
            }

            using (FileStream fs = new FileStream(path, FileMode.OpenOrCreate))
            {
                MyStyle style = new MyStyle();
                if (fontColor == null || backgroundColor == null)
                {
                    style.fontColor       = Brushes.Blue;
                    style.backgroundColor = (SolidColorBrush) new BrushConverter().ConvertFrom("#FFE3F8FF");
                }
                else
                {
                    style.fontColor       = fontColor;
                    style.backgroundColor = backgroundColor;
                }

                if (fontSize < 10 || fontSize > 20)
                {
                    style.fontSize = 15;
                }
                else
                {
                    style.fontSize = fontSize;
                }

                string       styleStr = XamlWriter.Save(style);
                StreamWriter sw       = new StreamWriter(fs);
                sw.Write(styleStr);
                sw.Close();
                fs.Close();
            }
        }