Theme Asp.Net

//Take one dropdownlist insert the name of skin file (through collection or create the masters of themes)

Default
skinfile
Changetheme
BasicBlue

//page_preInit Event because theme work on preinit event

protected void page_PreInit(object Sender,EventArgs e)
{
string theme="";
if(page.request.form.count>0)
{

theme=page.request["Theme"].tostring();// Theme is the id of dropdown
if(theme=="Defaule")
{
theme="";
}
}
this.Theme=theme;
}