public RedirectToRouteResult PortfolioDeleteSymbol(PortfolioAddSymbolModel portfolio_add_symbol)
        {
            if (System.Web.HttpContext.Current.User.Identity.Name == portfolio_add_symbol.Username)
            {
                DashboardService.DeleteSymbolFromPortfolio(portfolio_add_symbol.Portfolio_Id, portfolio_add_symbol.Symbol_Id);
            }

            return(RedirectToAction("Index"));
        }