public void UpdateStockList()
 {
     try
     {
         Cordners.Clear();
         List <SpecailOrders> selectedList = new List <SpecailOrders>();
         IsBusy = true;
         Task.Factory.StartNew(() =>
         {
             selectedList = _specailOrdersService.GetSaleStock(SelectedSupplier, SelectedCategory, SelectedSeasons, SelectedStyle, SelectedStockType, SelectedColour);
         }).ContinueWith((task) =>
         {
             foreach (var o in selectedList.ToArray().Distinct())
             {
                 Cordners.Add(o);
             }
             IsBusy = false;
         }, TaskScheduler.FromCurrentSynchronizationContext());
     }
     catch (Exception e)
     {
         new LogWriter().LogWrite(e.Message);
         new LogWriter().LogWrite(e.StackTrace);
         MessageBox.Show(e.Message);
     }
 }
        public void RemoveSelectedListItems()
        {
            var selectedList = new ArrayList(SpecailSelected);

            foreach (var o in selectedList.ToArray())
            {
                SpecailOrders.Remove(o as SpecailOrders);
                Cordners.Add(o as SpecailOrders);
            }
        }