//Clear Button
private void btnClearCourse_Click(object sender, RoutedEventArgs e)
{
courseservice.ClearCourse(this);
//TxtCourseID.Text = "";
//TxtCourseName.Text = "";
//TxtCourseDescription.Text = "";
//TxtCourseMinDeg.Text = "";
//TxtCourseMaxDeg.Text = "";
}