Immutable data class generator

I'm working on a DSL implementation for defining "data classes" with certain properties in C# (see http://blogs.gotdotnet.com/ericlippert/archive/2007/11/13/immutability-in-c-part-one-kinds-of-immutability.aspx for an example of the output).

Table of Contents

1. Goals
   
2. Skeleton implementation
   
3. ???