public static void Update(DiscountCard discountCard)
{
var date = DateTime.Now;
var document = XDocument.Load(Path);
var element = document.GetXElements("DiscountCards", "rec").First(el => el.GetXElementValue("CustomerId").ToGuid() == discountCard.CustomerId);
DiscountCard.SetXmlValues(element, discountCard);
File.WriteAllText(Path, document.ToString());
if (SyncData.IsConnect)
{
using (var connection = ConnectionFactory.CreateConnection())
connection.Execute(UpdateQuery, new { discountCard.Points, date, discountCard.CustomerId });
}
var idx = DiscountCards.FindIndex(ds => ds.CustomerId == discountCard.CustomerId);
DiscountCards[idx] = discountCard;
}