Sounds like one of the projects in your solution is referencing the v2 system assemblies. Make sure that all of your projects and application pools are set to use 4.0. You can set this in the project properties in Visual Studio.
I have been having the same issues for a long time, but just found some old Silverlight Assemblies in my bin folder, removed those and voila.. error gone.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.