private void PreviousCartesianOnClick(object sender, MouseButtonEventArgs e)
        {
            if (CartesianView == null)
            {
                return;
            }
            var current = CartesianExamples.IndexOf(CartesianView);

            current--;
            CartesianView = current >= 0 ? CartesianExamples[current] : CartesianExamples[CartesianExamples.Count - 1];
        }
        private void NextCartesianOnClick(object sender, MouseButtonEventArgs e)
        {
            if (CartesianView == null)
            {
                return;
            }
            var current = CartesianExamples.IndexOf(CartesianView);

            current++;
            CartesianView = CartesianExamples.Count > current ? CartesianExamples[current] : CartesianExamples[0];
        }