protected internal override event OrderStateHandler HowCost; //when cost of order is determined
//method for call event
private void CallEvent(OrderEvents e, OrderStateHandler handler)
{
if (e != null)
{
handler?.Invoke(this, e);
}
}
// method for show message of event when cost is determined
protected override void OnCost(OrderEvents e)
{
CallEvent(e, HowCost);
}
// method for show message of event when cost is determined
protected virtual void OnCost(OrderEvents e)
{
CallEvent(e, HowCost);
}