http://blogs.msdn.com/mhendersblog/archive/2006/03/28/563153.aspxI'm blogging to: The Yeah Yeah Yeahs Show Your Bones I just wanted to make sure eveyone was aware of this little fact. First of all, in more recent builds (at leas the Feb CTP and beyond) you no longer use Mapping PIs to reference external assemblies.en-USCommunityServer 2.1 SP1 (Build: 61025.2)