private void RemoveCourse(object parameter)
 {
     if (SelectedCourse != null && (MessageBox.Show("Are you sure you want to delete " + SelectedCourse.CourseName, "Training Database", MessageBoxButton.YesNo, MessageBoxImage.Question) == MessageBoxResult.Yes))
     {
         IEnumerable <int> idlist = CourseList.Select(t => t.ID);
         db.Courses.Remove(SelectedCourse);
         //SaveDataChanges(null);
         CourseList     = db.Courses.Local.Where(c => idlist.Contains(c.ID)).OrderBy(c => c.CourseName).ToList();
         SelectedCourse = CourseList.FirstOrDefault();
         NotifyPropertyChanged("Changed");
     }
 }