The model of type 'BusinessClassLibrary.Employee' could not be updated.

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SQL-Server

MVC5

hi
Error:

The model of type 'BusinessClassLibrary.Employee' could not be updated.

I am new to asp.net mvc. I got the above error. When i use UpdateModel(employee) method this error comming.

Employee.cs

public int ID { get; set; }
       [Required]
        public string Name { get; set; }
        public string Gender { get; set; }
        public string City { get; set; }
        public string DOB { get; set; }

In database DOB datatype is DateTime, but in .cs class i taken as a string.Is it creates any prob?
EmployeeController.cs

[HttpPost]
        [ActionName("create")]
        public ActionResult Create_Post()
        {
            if (ModelState.IsValid)
            {
                Employee employee = new Employee();
                UpdateModel(employee);

                EmployeeBusinessLayer employeebusinesslayer = new EmployeeBusinessLayer();
                employeebusinesslayer.AddEmployees(employee);
                return RedirectToAction("Index");
            }
            return View();
        }

Why that error comming? Where i did a mistake. Plz help to me.

Thanking you