Voted to close as "too localized". But if you find this question in an attempt to resolve your own issue I recommend tripple-checking all your interfaces and ensuring that they are supporting covariance. Thanks to Tim Rogers for mentioning this, one interface had slipped through, along with another very localized issue in my code base.
See also: stackoverflow. Com/questions/245607/how-is-generic-covariance-contra-variance-implemented-in-c-4-0 stackoverflow. Com/questions/2662369/covariance-and-contravariance-real-world-example stackoverflow.Com/questions/3445631/still-confused-about-covariance-and-contravariance-in-out.
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.