public IActionResult OnGet(int? id)
        {
            DepartmentVM = new DeptViewModel()
            {
                Faculty = _facultyRepo.GetFacultyListOfDropDown(),
                Department = new Department()
            };
            if (id != null)
            {
                var deptFromDb = _deptRepo.GetFisrtOrDefault(m => m.Id == id);
                if (deptFromDb == null)
                {
                    return NotFound();
                }
                DepartmentVM.Department = deptFromDb;
            }

            return Page();
        }