public double GetPositionPrice(string positionName)
        {
            if (!PositionPriceList.ContainsKey(positionName))
            {
                return(100);
            }

            return(PositionPriceList[positionName]);
        }
        private void ReadAllPositionPrices(XmlDocument xDoc, XmlNode xAppSettings, StorageFile file)
        {
            XmlNode xPriceList = GetPriceListNode(xDoc, xAppSettings, file);

            if (xPriceList.ChildNodes == null)
            {
                return;
            }

            foreach (XmlNode pos_i in xPriceList.ChildNodes)
            {
                string positionName = pos_i.Attributes["PositionName"].Value;
                double price        = Convert.ToDouble(pos_i.InnerText);
                PositionPriceList.Add(positionName, price);
            }
        }