private void AddCheckPoint_Click(object sender, RoutedEventArgs e)
 {
     AddCheckPoints window = new AddCheckPoints();
     if (window.ShowDialog().Value)
     {
         this.TransportViewModel.CheckPoints.Add(window.DataContext as RouteCheckpointInfo);
     }
 }
 private void AddCheckPoint_Click(object sender, RoutedEventArgs e)
 {
     AddCheckPoints window = new AddCheckPoints();
     if (window.ShowDialog().Value)
     {
         this.TransportViewModel.CheckPoints.Add(window.DataContext as RouteCheckpointInfo);
     }
 }