Setting an ASP.NET Master Page at runtime

Question

I\'m working on a site which needs to be able to support two or more looks, changable at runtime. I\'d hoped to be able to handle the change with a CSS switch, but it looks like

Answer 1

Inherit all you pages from a base class like

public class PageBase : System.Web.UI.Page
{
    public PageBase()
    {
        this.PreInit += new EventHandler(PageBase_PreInit);
    }
    void PageBase_PreInit(object sender, EventArgs e)
    {
        this.MasterPageFile = "~/MyMasterPage.Master";
    }
}