private void LoadExpert()
        {
            var x = App.LoadExpert(ExpertName);

            if (!Experts.Contains(x))
            {
                Experts.Add(App.LoadExpert(ExpertName));
            }
        }
        private void LoadExperts()
        {
            Experts.Clear();
            var x = App.LoadExperts();

            foreach (var exp in x)
            {
                Experts.Add(exp);
            }
        }