private void ConfirmExecute(object parameter)
        {
            AddSellOrderCollectionWindow AddSellOrderCollectionWindow = parameter as AddSellOrderCollectionWindow;

            CallBack(SellOrderCollection);
            AddSellOrderCollectionWindow.Close();
        }
        private void CancelExecute(object parameter)
        {
            SellOrderCollection = null;
            AddSellOrderCollectionWindow AddSellOrderCollectionWindow = parameter as AddSellOrderCollectionWindow;

            CallBack(SellOrderCollection);
            AddSellOrderCollectionWindow.Close();
        }