Apply page themes programmatically

apply a page themes programmatically:

Need to set page's 'Theme' Property in Page's Preint event

protected void Page_PreInit(object sender, EventArgs e)
{
switch (Request.QueryString["theme"])
{
case "Orange":
Page.Theme = "OrangeTheme";
break;
case "skyblue":
Page.Theme = "skyblueTheme";
break;
}
}


apply a style sheet themes programmatically:

Override 'StyleSheetTheme" propert in page code. Following code override existing code and set current page theme as 'SkyblueTheme'
public override String StyleSheetTheme
{
get { return "SkyblueTheme"; }
}

Apply Contol SKINS programmatically:
We can over ride control skin properties in PreInt event
void Page_PreInit(object sender, EventArgs e)
{
Calendar1.SkinID = "CustomSkin";
}