private void ButtonAdd_Click(object sender, RoutedEventArgs e)
{
CollegeSubjectDialog collegeSubjectDialog = new CollegeSubjectDialog()
{
Title = "Adicionar Curso"
};
if (collegeSubjectDialog.ShowDialog() == true)
{
subjects.Add(DbContextHelper.AddCollegeSubject(_db, collegeSubjectDialog.CollegeSubject));
subjectGrd.SelectedIndex = subjectGrd.Items.Count - 1;
}
}