Unfortunately hardly any ORMs support that (especially not EF, argh), and writing custom value-types is a painful experience given C# (still) doesn't support strict typedefs nor mixins.
If only structs were inheritable, then you could roll your own `struct Wrapper<T>` with operators for implicit conversion, equality, etc, and then extend it with just the name and type. Wouldn't help with the EF pain point though, and I'm sure it might confuse newcomers initially.
