private async void CreateNewOrder()
        {
            OrderModel newOrder = null;

            await Task.Run(() =>
            {
                newOrder = serviceRepository.CreateNewOrder();
            });

            if (newOrder != null)
            {
                OrdersList.Add(newOrder);
                SelectedOrder = newOrder;
                EventAggregator.GetEvent <OrderCreated>().Publish();
            }
        }