Object reference not set to an instance of an object. at AlRasikh.Areas.KMS.Models.CategoryRepository.getOrgranizedCategoriesByRoots(String brand) at AlRasikh.Controllers.ProductsController.Index(String brand) at lambda_method(Closure , ControllerBase , Object[] ) at System.Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext controllerContext, IDictionary`2 parameters) at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary`2 parameters) at System.Web.Mvc.ControllerActionInvoker.<>c__DisplayClass15. |