private ObservableCollection<NHACUNGCAP> nhacungcap;

        public ObservableCollection<NHACUNGCAP> Nhacungcap { get => nhacungcap; set => nhacungcap = value; }

private void btnRemove_Click(object sender, RoutedEventArgs e)
        {
            Nhacungcap.Remove(((sender as Button).DataContext as NHACUNGCAP));
        }

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