Working with either .Net framework 2.0 or 4.0 and building some dlls to help me in my daily tasks, I realized that when I registered the dll build in 4.0 they were not listed in the already well known %windir%\Assembly folder that I always check to make sure the files are set ok.
The location for dlls build with version 4.0 has changed to %windir%\Microsoft.NET\Assembly.
This is just a reminder for when you start to think "why my assembly doesn't show in gac folder ?!".