private void addButton_Click(object sender, RoutedEventArgs e)
{
contacts.Add(new Contact());
ContactDetailWindow add = new ContactDetailWindow(ContactDetailWindow.Mode.Add, contacts[contacts.Count - 1]);
add.Show();
// show "please select a contact"
}
private void editButton_Click(object sender, RoutedEventArgs e)
{
if(contactDataGrid.SelectedValue != null)
{
ContactDetailWindow edit = new ContactDetailWindow(ContactDetailWindow.Mode.Edit, contactDataGrid.SelectedValue as Contact);
edit.Show();
}
// show "please select a contact"
}
