public async Task <IActionResult> AddOrEdit([Bind("Id,FullName,Emp_Code,Postion,OfficeLocation")] Employee employee)
        {
            if (ModelState.IsValid)
            {
                if (employee.Id == 0)
                {
                    _context.Add(employee);
                }
                else
                {
                    _context.Update(employee);
                }

                await _context.SaveChangesAsync();

                return(RedirectToAction(nameof(Index)));
            }
            return(View(employee));
        }