Simple Ball of Mud

Order.cs

public class Order
{
    private readonly List<OrderLineItem>  _lineItems = new List<OrderLineItem>();

    public Guid Id { get; set; }
    public IEnumerable<OrderLineItem> LineItems { get { return _lineItems; } }
    public bool IsInterational { get; set; }
    public bool IsReadyToShip { get; set; }

    public void AddLineItem(OrderLineItem item)
    {
        _lineItems.Add(item);
    }
}

public class OrderLineItem
{
}

OrderProcessor.cs

public class OrderProcessor
{
    public void Process(ProcessOrderMessage message)
    {
        Order order;
        var conStr = ConfigurationManager.ConnectionStrings["OrdersDb"].ConnectionString;
        using(var con = new SqlConnection(conStr))
        {
            order = findOrder(message.Id, con);
        }

        if(order.IsInterational)
        {
            processInternationalOrder(order);
        }
        else if (order.LineItems.Count() > 10)
        {
            processLargeDomesticOrder(order);
        }
        else
        {
            processDomesticOrder(order);
        }

        if(order.IsReadyToShip)
        {
            var shipmentGateway = new ShipmentGateway();
            var readyToShip = new ShipOrderMessage {Id = message.Id};
            shipmentGateway
                .Ship(readyToShip);
        }

        // why not have two?
        using (var con = new SqlConnection(conStr))
        {
            updateDatabase(order, con);
        }
    }

    private Order findOrder(Guid id, SqlConnection con)
    {
        // actually do some crappy ado.net stuff
        return new Order();
    }

    private void updateDatabase(Order order, SqlConnection con)
    {
        // update the shtuff
    }

    private void processInternationalOrder(Order order)
    {
    }

    private void processLargeDomesticOrder(Order order)
    {
    }

    private void processDomesticOrder(Order order)
    {
    }
}

ProcessOrderMessage.cs

public class ProcessOrderMessage
{
    public Guid Id { get; set; }
}

Shipping.cs

public class ShipOrderMessage
{
    public Guid Id { get; set; }
}

public class ShipmentGateway
{
    public void Ship(ShipOrderMessage shipOrderMessage)
    {
        // does stuff that we don't care about
    }
}