public ActionResult Scheme()
        {
            ButtonVisiblity("Index");
            var model = new SchemeViewModel();

            ViewBag.PurityList      = new SelectList(_schemeService.GetPurityMasterList(), "Id", "PurityName");
            ViewBag.ProductList     = new SelectList(_schemeService.GetProductList(), "Id", "Name");
            model.SchemeId          = _schemeService.GetMaxPkNo();
            Session["EffectiveROI"] = null;
            return(View(model));
        }