public IActionResult Index(string id, string search)
{
List <ContactModel> listeContacts;
if (id != null)
{
ViewBag.message = id;
}
if (search == null)
{
listeContacts = ContactModel.GetAllContacts();
}
else
{
listeContacts = ContactModel.GetContactsBySearch(search);
}
return(View(listeContacts));
}