public PartialViewResult PortfolioAddSymbol(PortfolioAddSymbolModel portfolio_add_symbol)
 {
     if (System.Web.HttpContext.Current.User.Identity.Name == portfolio_add_symbol.Username)
     {
         string action_validation = ValidationService.ValidateUserSymbolCount(portfolio_add_symbol.Username, portfolio_add_symbol.Portfolio_Id);
         if (String.IsNullOrEmpty(action_validation))
         {
             DashboardService.AddSymbolToPortfolio(portfolio_add_symbol.Portfolio_Id, portfolio_add_symbol.Symbol_Id);
         }
         else
         {
             ViewBag.ActionValidationError = action_validation;
         }
     }
     return(PartialView("~/Views/Dashboard/Partial/Watchlists.cshtml", new DashboardModel(System.Web.HttpContext.Current.User.Identity.Name, portfolio_add_symbol.Portfolio_Id)));
 }