Check out the BCL site… we just posted some new CodeDom samples:


MSIL Code Provider
The Microsoft Intermediate Language (MSIL) code provider takes a CodeDom tree and generates MSIL syntax. MSIL code provider generates all the CodeDom elements that are part of the 1.1 conformance spec. MSIL code provider generates code for most of the CodeDom types that shipped in V1.1.   

Subset Code Provider
This CodeDom provider consumes CodeDom trees in the way the C# code provider does, but whenever a node that does not fall into the subset is encountered, it emits a #error in the generated code. This will alert to the CodeDom tree builder of any place in their code where they don't meet subset conformance.