BugTrackingSystem.Administrator.Inquiries.Page_PreInit C# (CSharp) Метод

        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!");
            }
        }