Add sublayout to layout

protected void Page_PreInit(object sender, EventArgs e)

{

Database db = Factory.GetDatabase("master");

Item slItm = db.Items["/sitecore/layout/sublayouts/Test"];

Sublayout sublayout = new Sublayout();

sublayout.Path = slItm["Path"];

sublayout.DataSource = db.Items["/sitecore/content/home"].Paths.Path;

MainPH.Controls.Add(sublayout);//Placeholder on the page

}