The following are some suggested supplemental references to further your retraining effort.
.NET Magazine:
http://www.fawcette.com/dotnetmag/
Visual Studio Magazine:
http://www.fawcette.com/vsm/
XML & Web Services Magazine:
http://www.fawcette.com/xmlmag/
.NET Framework Developer's Guide's "What is the Common Language Specification?":
http://msdn.microsoft.com/library/en-us/cpguide/html/cpconwhatiscommonlanguagespecification.asp
ILDasm Tutorial:
http://msdn.microsoft.com/library/en-us/cptutorials/html/il_dasm_tutorial.asp
Microsoft Communities (discussion groups, e-Newsletters, and so forth):
http://communities2.microsoft.com
MSDN:
http://msdn.microsoft.com