// GET: Contact
        public ViewResult List(string city = null, string function = null, int items = 3, int page = 1)
        {
            ContactListViewModel model = new ContactListViewModel
            {

                Contacts = repository.Contacts
                .Where(c => city == null || c.City == city).Where(c => function == null || c.Function == function)
                .OrderBy(c => c.ContactId).Skip((page - 1) * items).Take(items),
                PagingInfo = new PagingInfo
                {
                    CurrenPage = page,
                    ItemsPerPage = items,
                    TotalItems = (city == null & function == null) ? repository.Contacts.Count() :
                    repository.Contacts.Where(e => city == null || e.City == city).Count(e => function == null || e.Function == function)
                },
                CurrentCity = city,
                CurrentFunction = function
            };
            if (city == null & function == null)
            {
                return View(model);
            }
            else return View("ListByCityOrFunction", model);
        }
        public ActionResult ListByName(string lastName)
        {
            ContactListViewModel model = new ContactListViewModel
            {

                Contacts = repository.Contacts
                .Where(c => lastName == null || c.LastName == lastName).OrderBy(c => c.LastName),
                PagingInfo = new PagingInfo
                {
                    CurrenPage = 1,
                    ItemsPerPage = 3,
                    TotalItems = repository.Contacts.Where(e => lastName == null || e.LastName == lastName).Count()
                },
                CurrentCity = null,
                CurrentFunction = null
            };
            if (lastName != "")
            {
                return View(model);
            }
            else
            {
                return RedirectToAction("FindByLastName", "Menu");
            }
        }