public static void SetTheme(
            this DependencyObject dependencyObject,
            string themeName)
        {
            IThemeSetting theme         = GetThemeSetting(themeName);
            var           themeTypeName = theme.GetType().Name.Replace("ThemeSettings", "");

            SfSkinManager.RegisterThemeSettings(themeTypeName, theme);
            SfSkinManager.SetTheme(dependencyObject, new Theme(themeTypeName));
        }
        private static IThemeSetting GetThemeSetting(string themeName)
        {
            FontFamily    fontFamily   = new FontFamily("Microsoft YaHei");
            int           bodyfontSize = 14;
            IThemeSetting theme        = null;

            switch (themeName)
            {
            case "FluentLight":
                theme = new FluentLightThemeSettings()
                {
                    FontFamily = fontFamily, BodyFontSize = bodyfontSize,
                };
                break;

            case "MaterialLight":
                theme = new MaterialLightThemeSettings()
                {
                    FontFamily = fontFamily, BodyFontSize = bodyfontSize,
                };
                break;

            case "MaterialLightBlue":
                theme = new MaterialLightBlueThemeSettings()
                {
                    FontFamily = fontFamily, BodyFontSize = bodyfontSize,
                };
                break;

            case "Office2019White":
                theme = new Office2019WhiteThemeSettings()
                {
                    FontFamily = fontFamily, BodyFontSize = bodyfontSize,
                };
                break;

            case "FluentDark":
                theme = new FluentDarkThemeSettings()
                {
                    FontFamily = fontFamily, BodyFontSize = bodyfontSize,
                };
                break;

            case "MaterialDark":
                theme = new MaterialDarkThemeSettings()
                {
                    FontFamily = fontFamily, BodyFontSize = bodyfontSize,
                };
                break;

            case "MaterialDarkBlue":
                theme = new MaterialDarkBlueThemeSettings()
                {
                    FontFamily = fontFamily, BodyFontSize = bodyfontSize,
                };
                break;

            case "Office2019Black":
                theme = new Office2019BlackThemeSettings()
                {
                    FontFamily = fontFamily, BodyFontSize = bodyfontSize,
                };
                break;
            }
            return(theme);
        }