/// <summary>

        /// 设置App样式

        /// </summary>

        /// <param name="accentName">窗口标题栏样式</param>

        /// <param name="themeName">背景样式</param>

        private void ChangeTheme(string accentName, string themeName)

        {

            Accent expectedAccent = ThemeManager.Accents.First(x => x.Name == accentName); //"Blue"

            AppTheme expectedTheme = ThemeManager.GetAppTheme(themeName);  //"BaseDark"

            ThemeManager.ChangeAppStyle(Application.Current, expectedAccent, expectedTheme);

        }