Your implementation is basically reimplementing string. Join method, so you might try to make it simpler and more generic with some LINQ.
I think the way would be to let PersonDocument and AssetDocument inherit from a Document class, which would have an Id property, that stores your current PersonId or AssetId respectivly.
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.