private void Button_Click_1(object sender, RoutedEventArgs e) { try { Course course = new Course(); course.Name = CName.Text.ToString(); course.StartDate = StartDate.SelectedDate.GetValueOrDefault(); course.EndDate = EndDate.SelectedDate.GetValueOrDefault(); CourseBL courseBL = new CourseBL(); bool courseAdd = courseBL.AddNewCourse(course); if (courseAdd == true) { MessageBox.Show("Course Added Successfully..."); } else { MessageBox.Show("Course not Added", "Error", MessageBoxButton.OK, MessageBoxImage.Error); } } catch (Exception ex) { MessageBox.Show(ex.Message, "Error", MessageBoxButton.OK, MessageBoxImage.Error); } }