private void AddCourseButton_Click(object sender, RoutedEventArgs e)
{
Course c = new Course();
//Pull data from text boxes and put in c
c.Id = Convert.ToInt32(IdTextBox.Text);
c.Designator = DesignatorTextBox.Text;
c.Number = NumberTextBox.Text;
c.Title = TitleTextBox.Text;
c.Description = DescriptionTextBox.Text;
c.Credits = Convert.ToInt32(CreditsTextBox.Text);
dataLayer.AddCourse(c);
}