private void LeesSessieGegevens()
        {
            SessieDataService sessieDs =
                new SessieDataService();

            Sessies = new ObservableCollection <Sessie>(sessieDs.GetSessies());
            //Pionnen = new ObservableCollection<Pion>(pionDs.GetPionnen());

            BordDataService bordDs =
                new BordDataService();

            Borden = new ObservableCollection <Bord>(bordDs.GetBorden());

            RecentsteSessie = Sessies.LastOrDefault();



            foreach (Bord bord in Borden)
            {
                if (bord.ID == RecentsteSessie.bordID)
                {
                    hexBrush = new SolidColorBrush((Color)ColorConverter.ConvertFromString(bord.HexCode));
                }
            }
        }
        private void LeesSessies()
        {
            //instantiëren dataservice
            SessieDataService sessieDs =
                new SessieDataService();

            Sessies = new ObservableCollection <Sessie>(sessieDs.GetSessies());
        }