public void AddToCart(StockItem item)
        {
            using (eToolsSystemContext context = new eToolsSystemContext())
            {
                StockItem added = null;

                added = context.

            }
        }
 public void StockItem_Update(StockItem selectedStockItem)
 {
     using (eToolContext context = new eToolContext())
         {
             context.Entry<StockItem>(context.StockItems.Attach(selectedStockItem)).State
                 = System.Data.Entity.EntityState.Modified;
             context.SaveChanges();
         }
 }