private void ButtonAdd_Click(object sender, RoutedEventArgs e)
{
CollegeDialog collegeDialog = new CollegeDialog()
{
Title = "Adicionar Universidade"
};
if (collegeDialog.ShowDialog() == true)
{
colleges.Add(DbContextHelper.AddCollege(_db, collegeDialog.College));
collegeGrd.SelectedIndex = collegeGrd.Items.Count - 1;
}
}