On Thu, 13 Mar 2014 21:33:56 +0100, Sönke Ludwig wrote:

You have to remove all the immutable modifiers in Message to make it
compile. They are not necessary here, because all fields are either
value types or already immutable (string).

In theory, there is no reason why this shouldn't also work with
immutable, but Variant doesn't seem to like it.

It works! awesome :) thanks