private void themeComboBox_SelectedIndexChanged(object sender, EventArgs e)
        {
            MetroThemeStyle newTheme = (MetroThemeStyle)themeComboBox.SelectedItem;

            AppearanceManager.SetThemeOnForms(newTheme, this, _shellForm);

            AppearanceManager.SaveSettings(_shellForm.BaseMetroStyleManager);
        }
        private void styleButton_Click(object sender, EventArgs e)
        {
            MetroColorStyle?style = AppearanceManager.ConvertStyleToColor(((Button)sender).BackColor);

            if (style != null)
            {
                AppearanceManager.SetStyleOnForms(style.Value, this, _shellForm);

                AppearanceManager.SaveSettings(_shellForm.BaseMetroStyleManager);
            }
        }