public MemberViewModel() { Title = "Member"; Members = new ObservableCollection <Member>(); LoadMembersCommand = new Command(async() => await ExecuteLoadItemsCommand()); /*TODO: MessagingCenter to register when implemented AddMember*/ MessagingCenter.Subscribe <NewMemberPage, Member>(this, "AddMember", async(obj, item) => { var newItem = item as Member; Members.Add(newItem); await MemberStore.AddDataAsync(newItem); }); }