public OnShopItemSaveEvtArgs(string _brief, 
     string _desc, double _priority, double _cost,
     ExistingListActivity.dboperations _operation, int _ID = 0)
     : base()
 {
     ID = _ID;
     item_brief = _brief;
     item_Cost = _cost;
     item_priority = _priority;
     item_description = _desc;
     operate = _operation;
 }
 public OnDismissListener(ExistingListActivity.dboperations opt)
 {
     operate = opt;
 }