public AcquaintanceListViewModel()
        {
            _CapabilityService = DependencyService.Get <ICapabilityService>();

            DataSource = new AcquaintanceDataSource();

            SubscribeToSaveAcquaintanceMessages();

            SubscribeToDeleteAcquaintanceMessages();
        }
        public AcquaintanceListViewModel()
        {
            _CapabilityService = DependencyService.Get<ICapabilityService>();

            DataSource = new AcquaintanceDataSource();

            SubscribeToSaveAcquaintanceMessages();

            SubscribeToDeleteAcquaintanceMessages();
        }