Change BillingAddress to allow NULL values

[flcdrg]

"NOT NULL NULL" is not valid T-SQL. Given it refers to the previous type, allowing this column to be nullable seems to be what was intended.

[roji]

Thanks for spotting the error, but I don't see any reason for this to be nullable, given that ShippingAddress just above is non-nullable and they configured exactly the same (plus the section just above - for table splitting - shows two non-nullable properties.

[flcdrg]

But it isn't!

If you refer to the most recent definition above it is defined like this:

public class Customer
{
    ...

    public Address ShippingAddress { get; set; }
    public Address? BillingAddress { get; set; }
}

[roji]

Oops, you're right - sorry about that. Submitted #5250 to correct it.