According to the documentation, it is possible to skip the entire namespace:
<Module file="$(InPath)\AssemblyX.exe">
<!-- skip a namespace -->
<SkipNamespace name="Company.PublicBits" />
All the subtypes (classes) under Company.PublicBits will also be skipped. But I am looking for a way to only not obfuscate namespace itself, but still obfuscate all its subtypes. Is it possible to be done by configuration?