protected override void Act()
        {
            var cacheManager = LoggingViewModel.GetDescendentsOfType <TraceListenerData>().Single();

            try
            {
                cacheManager.Property("TraceOutputOptions").BindableProperty.BindableValue = "abc";
            }
            catch { }
        }
        protected override void Arrange()
        {
            base.Arrange();

            elementViewModel          = LoggingViewModel.GetDescendentsOfType <TraceListenerData>().Single();
            HostAdapter.TasksChanged += (sender, args) => validationError = args.Tasks.First();

            try
            {
                elementViewModel.Property("Filter").BindableProperty.BindableValue = "abc";
            }
            catch { }
        }