public void AddNew(EmployeeView employee)
{
if (employee is null)
{
throw new ArgumentNullException(nameof(employee));
}
if (_Employes.Any(e => e.Id == employee.Id))
{
return;
}
_Employes.Add(employee.FromViewModel(_Employes.Count == 0 ? 1 : _Employes.Max(e => e.Id) + 1));
}
