asp.net简单实现页面换肤的方法

private string _StyleClass;
public string StyleClass
{
 get { return _StyleClass; }
 set { _StyleClass = value; }
}
private void StyleForm()
{
 HtmlForm Form1 = this.FindControl("form1") as HtmlForm;
 Form1.Attributes.Add("class", _StyleClass);
}
protected override void OnPreRender(EventArgs e)
{
 //控件呈现调用方法
 StyleForm();
 base.OnPreRender(e);
}