These namespaces were introduced in CLR 2.0. For example for the
GCHeap::GcCondemnedGeneration
symbol, it's WKS::GCHeap::GcCondemnedGeneration for Workstation GC and SVR::GCHeap::GcCondemnedGeneration for Server GC (if you are reading the Investigating Memory Issues article in the recent MSDN magazine and are trying out some of ...