The calling thread cannot access this object?

Your problem is that the System.Timers. Timer event runs on a different thread than the UI thread. You can try directly invoking as others have mentioned or you could use DispatcherTimer.

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.