This is a new add-in related to the ILGraph addin for Reflector. Basically I use the IL graph to extract all the path to cover the entire graph (and get full coverage). Each path then generates an empty Unit Test Case (using Refly) that the user will have to write. Better than words, the schema below is straightforward:
The addin can generate Unit Test cases for methods, types, namespaces or even full assemblies! Since it is based on CodeDom, it supports output to any .NET language.