public CardDragDropHolder(object sender, List<int> cardIDs, string description, List<int> cardListIDs, CardDragDropAction action)
 {
     Sender = sender;
     CardIDs = cardIDs;
     Description = description;
     Action = action;
     CardListIDs = cardListIDs;
 }
 public CardDragDropHolder(object sender, List<int> cardIDs, string description, CardDragDropAction action)
     : this(sender, cardIDs, description, new List<int>(), action)
 {
 }