public IActionResult Create(EmployeeViewModel Employee) { if (Employee is null) { throw new ArgumentNullException(nameof(Employee)); } if (Employee.Name == "123" && Employee.SecondName == "QWE") { ModelState.AddModelError(string.Empty, "Странное имя и фамилия ..."); } if (!ModelState.IsValid) { return(View(Employee)); } _EmployeesData.Add(Employee.FromView()); _EmployeesData.SaveChages(); return(RedirectToAction("Index")); }