private void SaveChange()
 {
     using (var context = new StockShopEntities())
     {
         context.SaveChanges();
     }
 }
 public void CreateEntity(Outcome entity)
 {
     if (entity == null)
     {
         throw new ArgumentNullException("entity");
     }
     using (var context = new StockShopEntities())
     {
         context.Outcome.Add(entity);
         context.SaveChanges();
     }
 }