I don't know if the problem has been solved yet, but I've had the same problem with my (POCO) "Scenario" class.
The error is caused because GridView does not handle polymorphic datasources when using boundfields. So you have two options.
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.