public virtual void ModifyCustomers()
        {
            List <Customer> newCustomers = AddCustomers(10);

            context.SubmitChanges();

            EditCustomers(newCustomers);
            context.SubmitChanges();

            DeleteCustomers(newCustomers);
            context.SubmitChanges();
        }
        public ActionResult MasterGridViewPartialAddNew(AdvancedMasterDetail.Models.Supplier item)
        {
            var model = context.Suppliers;

            if (ModelState.IsValid)
            {
                try
                {
                    // Insert here a code to insert the new item in your model
                    context.Suppliers.InsertOnSubmit(item);
                    context.SubmitChanges();
                }
                catch (Exception e)
                {
                    ViewData["EditError"] = e.Message;
                }
            }
            else
            {
                ViewData["EditError"] = "Please, correct all errors.";
            }
            return(PartialView("_MasterGridViewPartial", model));
        }