protected void Page_PreInit(object sender, EventArgs e)
{
if (Page.Request.QueryString["mode"] == "administrator")
{
this.MasterPageFile = "~/Administrator/Administrator.master";
}
else if (Page.Request.QueryString["mode"] == "tester")
{
this.MasterPageFile = "~/Tester/Tester.master";
}
else
{
throw new ArgumentException("Mode of page is not specified!");
}
}