I am creating a checkout page which displays a radiobuttonlist for available countries and another RBL for each shippingmethod available in the currently selected country.

The issue I am having is attempting to save an order after having set a countryId at which point I get a nullReferenceError like this:

Error Loading Razor Script (file: ) Object reference not set to an instance of an object.    at TeaCommerce.Data.Order.get_ShippingMethodId()
  at TeaCommerce.Data.Order.Save()
  at ASP._Page_macroScripts_checkout_cshtml.Execute() in c:\projectdir\Checkout.cshtml:line 20

This seems to make some sense since I've not yet actually set a ShippingMethodId, but I cannot seem to figure out how to do this from the C# codebehind/Razor where this is happening, unfortunately I expect to need to set a country before I can let TeaCommerce find and manage the legal shippingmethods for that country.

Attempting to hardset a shippingmethodid instead using "order.shippingmethodid = 1", treats me to a similar error:

Error Loading Razor Script (file: ) Object reference not set to an instance of an object.    

at TeaCommerce.Data.Order.get_ShippingMethodId()

at TeaCommerce.Data.Order.set_ShippingMethodId(Nullable`1 value)

which seems to suggest setting a shippingorderid is not the way to do this.

Which I guess leads me to the first question: How do I properly set a shippingmethod based on selected country from C# or Razor?

Thanks in advance