private void LvBrands_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
if (!(lvBrands.SelectedItem is null))
{
_selectedBrand = lvBrands.SelectedItem as Brand;
SetBrandUpdateField();
}
}
private void ClearBrandUpdateField()
{
_selectedBrand = null;
tbxUpdateBrand.Text = null;
btnDeleteBrand.IsEnabled = false;
}