public List <DateTime> GetPossibleDates()
        {
            Dictionary <string, DateTime> dates = new Dictionary <string, DateTime>();

            BackEndData.GetAllCyclingData().ForEach(x => dates.TryAdd(x.col2.ToString("MM-yyyy"), x.col2));

            List <DateTime> sortedList = dates.Values.ToList();

            sortedList.Sort();
            sortedList.Reverse();
            return(sortedList);
        }
 private void radioFietsTraining_Checked(object sender, RoutedEventArgs e)
 {
     dgOverview.ItemsSource = BackEndData.GetAllCyclingData();
     SortDataGrid(dgOverview, 2);
 }