async Task FindFilteredContactsAsync() { this.IsRefreshing = true; string authToken = await _cacheService.GetObject <string>("AuthToken"); if (authToken != null) { var contacts = await _contactsService.FindFilteredContact(authToken); if (contacts.Any()) { var list = new List <ContactViewModel>(); foreach (var result in contacts) { var contact = this.Contacts .FirstOrDefault(x => x.Id.Equals(result.Id)); if (contact != null) { contact.TrySet(result); } else { contact = new ContactViewModel(); contact.TrySet(result); this.Contacts.Add(contact); } } if (list.Any()) { this.Contacts.AddRange(list); } } } this.IsRefreshing = false; }