I'm implementing different shipping prices by weight based on this post.

I'm using Umbraco v6 & Tea Commerce v2 so things are done a little differently.

The bit I'm struggling with is the setting of the shipping price.

In the original post it's done like this:

order.ShippingFeeWithoutVAT = totalShippingPriceWithoutVAT;
order.Save();

In TC v2 you can't set the order.ShipmentInformation.TotalPrice.Value directly because it is read only.

Instead I've created a new price object and assigned it.

Price newShippingTotalPrice = new Price(shippingPriceWithoutVAT, order.VatRate, TeaCommerceHelper.GetCurrency(order.StoreId, order.CurrencyId));
order.ShipmentInformation.TotalPrice = newShippingTotalPrice;
order.Save();

However the new shipping price does not get saved to the order.
If I read the order back immediately using

TeaCommerceHelper.GetCurrentOrder(order.StoreId);

I can see it has not been saved.

What am I doing wrong?

Regards, Matt