MVVM: class that implements ViewModel not updating its Model instance?

Everything looks OK except one small, but important detail. It looks like you forgot to set DataContext of your view to the instance of the view model.

In your FooBarViewModel you are not instantiating your Model, it is left as null, since you marked it readonly, you will need to new it in a default constructor.

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.