private void CreateCommertialProductGroup()
{
TimeSpan deliveryTime = new TimeSpan(_ComercialProductGroupDeliveryTime.Value, 0, 0, 0);
ComercialProductGroup group = new ComercialProductGroup(_ComercialProductGroupName.Value,
_ComercialProductGroupPurchasePrice.Value,
_ComercialProductGroupSellPrice.Value,
deliveryTime);
_Stock.AddComercialProductGroup(group);
UpdateComercialProductGroups();
}
public void AddComercialProductGroup(ComercialProductGroup group)
{
_ComercialProductGroups.Add(group);
}