前提: 默认皮肤的显示http://www.cnblogs.com/chucklu/p/4785572.html
1.修改XtraForm的LookAndFeel的SkinName属性,设置为Caramel
this.LookAndFeel.SkinName = "Caramel";
2.运行程序后,发现设置没有生效
3.修改XtraForm的LookAndFeel的UseDefaultLookAndFeel 属性为false
this.LookAndFeel.UseDefaultLookAndFeel = false;
4.再次运行程序,皮肤更换成功